From TWICChristopher Kreuzer wrote: Would anyone be able to post that game here?
Chess Player Strip Searched
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Roger de Coverly
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Re: Chess Player Strip Searched
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Chris Rice
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Re: Chess Player Strip Searched
OK I'm convinced Jon Rogers has an argument here. When you look at the position after 23...Bc8 be honest what would you play? Most of us wouldn't have even looked at 24 Nf5. Even if we had seen the idea would we have played it? Almost certainly not, not only because its complicated and if we got it wrong would be a piece down and lose the game on the spot but especially because there is a far more human and risk free move to play. I'm sure most of us would have played 24 Nd8 with the idea of putting it on e6 and White's got to be winning after that.
I saw 24 Nd8 before I put it on Fritz and it wasn't among the first three choices initially, a few seconds later it had bettered the third ranked move evaluation. The first ranked choice of Fritz was of course instantaneously 24 Nf5. This is hardly conclusive proof on its own but it does further increase the suspicion that Ivanov was cheating.
I saw 24 Nd8 before I put it on Fritz and it wasn't among the first three choices initially, a few seconds later it had bettered the third ranked move evaluation. The first ranked choice of Fritz was of course instantaneously 24 Nf5. This is hardly conclusive proof on its own but it does further increase the suspicion that Ivanov was cheating.
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Chris Rice
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Re: Chess Player Strip Searched
I see Stewart Reuben's achieved a 2703 performance rating after round 9 at Hastings.
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Chris Rice
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Re: Chess Player Strip Searched
Another ChessBase article on the "cheating scandal" in Zadar. http://www.chessbase.com/newsdetail.asp?newsid=8760
A Bulgarian FM Lilov 2433 has done an hour long video on all Ivanov's games. He refers to "Stealth Glasses" but ChessBase refuses to give links. I have because sooner or later we will have to deal with these issues. You can buy them on Amazon for $36. The reviews aren't great so this is still developing technology. http://www.amazon.com/SPY-NET-Stealth-V ... B004X4X3N0
I was only joking about Stewart btw so no need to get the rubber gloves out looking for implants.
A Bulgarian FM Lilov 2433 has done an hour long video on all Ivanov's games. He refers to "Stealth Glasses" but ChessBase refuses to give links. I have because sooner or later we will have to deal with these issues. You can buy them on Amazon for $36. The reviews aren't great so this is still developing technology. http://www.amazon.com/SPY-NET-Stealth-V ... B004X4X3N0
I was only joking about Stewart btw so no need to get the rubber gloves out looking for implants.
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Mike W. Richardt
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Re: Chess Player Strip Searched
The article from Tiger Lilov - http://www.chessbase.de/nachrichten.asp?newsid=13813
The article is in german but the 70 mins vidoe is in english!!!
The article is in german but the 70 mins vidoe is in english!!!
Nullius addictus iurare in verba magistri - I am not bound to believe in the word of any master
http://www.mikerichardt.co.uk
http://www.mikerichardt.co.uk
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Chris Rice
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Re: Chess Player Strip Searched
Here is a quick and dirty translation of all the best bits of the Lilov article:
"The consensus is that Ivanov played almost perfect chess and followed Houdini in at least 9 out of 10 cases, for each move it was always one of Houdini's top three proposals.
Of course, one may ask, why Ivanov has not won all the games and lost in the second round against GM Ognen Jovanovic? Lilov notes that Ivanov lost to Jovanovic despite almost exclusively following Houdini's recommendations. It was because the position was closed after the opening and we know that in closed positions the computer has been known to play badly. Lilov reveals that Ivanov lost that game by making errors in a totally drawn position.
The following position (you'll have to refer back to the diagram from the ChessBase article http://www.chessbase.de/nachrichten.asp?newsid=13813 - ed) Black played 115th ..Bd6? and with the simple white 116.Nf4 it was clear that Black had overlooked the threat of losing the pawn at d5. White then played 116… Bxf4 117.Kxf4 with an easily won pawn ending for White. Lilov explains in the diagram position that Black should have moved his king with 115 …Ke6 116 Nf6 d6 with an easy draw.
In other words, Black had been playing this game almost perfectly, not making any mistakes and then overlooked a simple threat, which forced him to transition into a lost pawn ending. Lilov explained this oversight was probably caused by lack of time and assumes that the correct continuation in the hectic closing stages could not be delivered.
But Ivanov hit back immediately and in round 3 he destroyed GM Bojan Kurajica with brilliant play on two fronts, which was crowned by a tactically precise mating attack. Lilov explains that Houdini is again almost always of the same opinion as Ivanov. The remarkable thing about this game is, however, above all, that Ivanov has played "chaotic, illogical trains of thought" based on hidden tactical options and precise calculation. Lilov also feels its conspicuous that Black, a 2520 GM, contributed almost no resistance.
Round four was followed by a draw against Davorin Kuljasevic, again with striking parallels to Houdini. However, the game was simplified right after the opening so that Black had little tactical ways to outwit his opponent.
In rounds five and six, followed devastating victories against Zelcic and Kozul, both were beaten by mating attacks. And again there was a strong agreement with the proposals by Houdini. Lilov remarks how amazingly accurate and precise Ivanov ‘s play is. Even the best players choose their moves intuitively and this intuition is prone to error.
After round seven, Ivanov is investigated by the tournament committee and following this in round eight the game against Borki Predojevic, in contrast to the previous games, is not broadcast live on the Internet. Lilov shows that Ivanov shows none of the preciseness and creativity from previous rounds and loses pathetically.
In the ninth and final round Ivanov wins in a game then rich with incident and tactically precise against GM Ivan Saric and ends up fourth in the tournament.
Lilov concludes that "more than 95 to 97% of Ivanov's trains of thought are trains of thought that would be suggested by very powerful engines which no man is capable of.
But Lilov is not content to analyse just Zadar, but digs deeper - and reveals more suprises. He looks at the chess career of Ivanov and notes that the Bulgarian had difficulties up to September 2012 of even winning one game against a player rated more than 2200 Elo. Take the first round of the Balkan Belogradchik Chess Festival 2012. Ivanov loses to a player rated 1916 Elo. But then comes the great metamorphosis: Ivanov is transformed overnight into a dangerous and strong player and wins 7/7.
Lilov has no doubt that Ivanov had computer help. At the end of this fascinating video, Lilov impresses with precise analysis and a deep understanding of chess and follows with a further surprise: Lilov shows what tools Ivanov could have taken advantage of: small cameras that can transmit the position to a partner anywhere in the world who is watching and analysing on his computer and a miniature microphone that can be hidden so well and deep in the ear, it cannot be discovered.
Lilov explains, both the camera and microphone in Bulgaria can be bought for about 50 Euro and are a popular tool by students in examinations. To prevent cheating in chess tournaments, Lilov suggests that tournament organizers should have a transmitter that emits noise and prevents the electronic signals.
"The consensus is that Ivanov played almost perfect chess and followed Houdini in at least 9 out of 10 cases, for each move it was always one of Houdini's top three proposals.
Of course, one may ask, why Ivanov has not won all the games and lost in the second round against GM Ognen Jovanovic? Lilov notes that Ivanov lost to Jovanovic despite almost exclusively following Houdini's recommendations. It was because the position was closed after the opening and we know that in closed positions the computer has been known to play badly. Lilov reveals that Ivanov lost that game by making errors in a totally drawn position.
The following position (you'll have to refer back to the diagram from the ChessBase article http://www.chessbase.de/nachrichten.asp?newsid=13813 - ed) Black played 115th ..Bd6? and with the simple white 116.Nf4 it was clear that Black had overlooked the threat of losing the pawn at d5. White then played 116… Bxf4 117.Kxf4 with an easily won pawn ending for White. Lilov explains in the diagram position that Black should have moved his king with 115 …Ke6 116 Nf6 d6 with an easy draw.
In other words, Black had been playing this game almost perfectly, not making any mistakes and then overlooked a simple threat, which forced him to transition into a lost pawn ending. Lilov explained this oversight was probably caused by lack of time and assumes that the correct continuation in the hectic closing stages could not be delivered.
But Ivanov hit back immediately and in round 3 he destroyed GM Bojan Kurajica with brilliant play on two fronts, which was crowned by a tactically precise mating attack. Lilov explains that Houdini is again almost always of the same opinion as Ivanov. The remarkable thing about this game is, however, above all, that Ivanov has played "chaotic, illogical trains of thought" based on hidden tactical options and precise calculation. Lilov also feels its conspicuous that Black, a 2520 GM, contributed almost no resistance.
Round four was followed by a draw against Davorin Kuljasevic, again with striking parallels to Houdini. However, the game was simplified right after the opening so that Black had little tactical ways to outwit his opponent.
In rounds five and six, followed devastating victories against Zelcic and Kozul, both were beaten by mating attacks. And again there was a strong agreement with the proposals by Houdini. Lilov remarks how amazingly accurate and precise Ivanov ‘s play is. Even the best players choose their moves intuitively and this intuition is prone to error.
After round seven, Ivanov is investigated by the tournament committee and following this in round eight the game against Borki Predojevic, in contrast to the previous games, is not broadcast live on the Internet. Lilov shows that Ivanov shows none of the preciseness and creativity from previous rounds and loses pathetically.
In the ninth and final round Ivanov wins in a game then rich with incident and tactically precise against GM Ivan Saric and ends up fourth in the tournament.
Lilov concludes that "more than 95 to 97% of Ivanov's trains of thought are trains of thought that would be suggested by very powerful engines which no man is capable of.
But Lilov is not content to analyse just Zadar, but digs deeper - and reveals more suprises. He looks at the chess career of Ivanov and notes that the Bulgarian had difficulties up to September 2012 of even winning one game against a player rated more than 2200 Elo. Take the first round of the Balkan Belogradchik Chess Festival 2012. Ivanov loses to a player rated 1916 Elo. But then comes the great metamorphosis: Ivanov is transformed overnight into a dangerous and strong player and wins 7/7.
Lilov has no doubt that Ivanov had computer help. At the end of this fascinating video, Lilov impresses with precise analysis and a deep understanding of chess and follows with a further surprise: Lilov shows what tools Ivanov could have taken advantage of: small cameras that can transmit the position to a partner anywhere in the world who is watching and analysing on his computer and a miniature microphone that can be hidden so well and deep in the ear, it cannot be discovered.
Lilov explains, both the camera and microphone in Bulgaria can be bought for about 50 Euro and are a popular tool by students in examinations. To prevent cheating in chess tournaments, Lilov suggests that tournament organizers should have a transmitter that emits noise and prevents the electronic signals.
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Christopher Kreuzer
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Re: Chess Player Strip Searched
Thanks very much for this. It is fascinating, if more than a bit worrying how fast things are moving. I only hope that chess authorities and organisers worldwide (and in the UK) can keep up with developments and implement or oversee any changes that are needed.Chris Rice wrote:Here is a quick and dirty translation of all the best bits of the Lilov article [...]
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John Upham
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Re: Chess Player Strip Searched
The Lilov video is worth watching and for me, at least, convincing.
I believe that jammers are illegal and banned by the Home Office under the Wireless Telegraphy Act 2006 but am no expert in these matters.
It would be pragmatic, legal and cheaper to scan for Bluetooth devices: I would suggest that all Bluetooth signals should be accounted for within the playing area.
There may well be legitimate Bluetooth signals found such as those for the newer DGT equipment.
Any unaccounted for devices should be tracked and eliminated.
Are there any experts in this field in forum land?
Are there non-Bluetooth technologies in the transmission domain?
I believe that jammers are illegal and banned by the Home Office under the Wireless Telegraphy Act 2006 but am no expert in these matters.
It would be pragmatic, legal and cheaper to scan for Bluetooth devices: I would suggest that all Bluetooth signals should be accounted for within the playing area.
There may well be legitimate Bluetooth signals found such as those for the newer DGT equipment.
Any unaccounted for devices should be tracked and eliminated.
Are there any experts in this field in forum land?
Are there non-Bluetooth technologies in the transmission domain?
British Chess News : britishchessnews.com
Twitter: @BritishChess
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Twitter: @BritishChess
Facebook: facebook.com/groups/britishchess
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MartinCarpenter
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Re: Chess Player Strip Searched
Bluetooth is just short range communications though.
So only really useful for anything on site and that's not the main issue. A camera fed, purely local, system would be exceedingly hard to produce. Getting an invisible camera where it could get a reliable view of the board and then interpreting it reliably? Serious effort and I'd not want to underwrite the image recognition bit. It has to work reliably for 50+ moves every game.
Yes, at some stage - 20(?) years - it'll be possible to hook a cemera up behind your eye and have a direct cranial interface to a computer. That'll be fun.
Anyhow why bother when there's no time delay on the live transmission?! A very good idea to have that.
As for ear pieces, well if we're transmitting from off site anyway then just use one which will receive direct. A seperate bluetooth hub would just add extra points of vunerability.
Or you could use a different short range radio frequency. More work but doing anything like this 'right' would be far from trivial in the first place. It's not off the shelf. Easiest to do it with a few humans involved but that sort of thing does seem to tend to break down over time.
So only really useful for anything on site and that's not the main issue. A camera fed, purely local, system would be exceedingly hard to produce. Getting an invisible camera where it could get a reliable view of the board and then interpreting it reliably? Serious effort and I'd not want to underwrite the image recognition bit. It has to work reliably for 50+ moves every game.
Yes, at some stage - 20(?) years - it'll be possible to hook a cemera up behind your eye and have a direct cranial interface to a computer. That'll be fun.
Anyhow why bother when there's no time delay on the live transmission?! A very good idea to have that.
As for ear pieces, well if we're transmitting from off site anyway then just use one which will receive direct. A seperate bluetooth hub would just add extra points of vunerability.
Or you could use a different short range radio frequency. More work but doing anything like this 'right' would be far from trivial in the first place. It's not off the shelf. Easiest to do it with a few humans involved but that sort of thing does seem to tend to break down over time.
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Paolo Casaschi
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Re: Chess Player Strip Searched
I don't know about the 2006 Act, but there are at least two reasons for banning jammers: fisrt, mobile phones are used for emergency calls, so you can't decide to disrupt mobile calls in any given area, especially public. Then, mobile operators paid a substantial amount of money for the mobile licenses; I believe that as part of the deal they got some guarantee from people deliberately (or not) interfering with their public service (can you imagine otherwise Vodafone trying to jam O2's signal?).John Upham wrote:I believe that jammers are illegal and banned by the Home Office under the Wireless Telegraphy Act 2006 but am no expert in these matters.
Plenty. The most commonly available such as Bluethoot and Wifi are easy to detect, but there are plenty of other options if you want to go underground. Most common technologies are much likely to be extremely cheap, other might be more expensive and not readily integrated with the devices you might want to use.John Upham wrote:Are there non-Bluetooth technologies in the transmission domain?
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Mick Norris
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Re: Chess Player Strip Searched
Leonard Barden is name checked here, interesting letter
http://www.cse.buffalo.edu/~regan/chess ... report.pdf
Press article here
http://rjlipton.wordpress.com/2013/01/1 ... me-affair/
http://www.cse.buffalo.edu/~regan/chess ... report.pdf
Press article here
http://rjlipton.wordpress.com/2013/01/1 ... me-affair/
Any postings on here represent my personal views
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Geoff Chandler
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Re: Chess Player Strip Searched
Interesting to note that Alan Tate is mentioned in the 2nd article
Apparently he scored well but with a lower computer match up
than his opponents.
(My joke about first to turn off their computer will be will be KIng is coming true.)
One of lads who has been doing this for years on Red Hot Pawn
supplied Houdini engine anlaysis of the Ivanov - Kurajica game.
One game is never enough but this is one of the highest match ups
I've seen in a GM game. No wonder everyone is suspicious.
I'll give the full analysis as posted on RHP. Apparently it takes a couple
of hourse to do this correctly.
[Event "19th Open A"]
[Site "Zadar"]
[Date "2012.12.17"]
[Round "3.12"]
[White "Borislav Ivanov"]
[Black "Bojan Kurajica"]
[Result "1-0"]
[ECO "E00"]
[WhiteElo "2227"]
[BlackElo "2565"]
[PlyCount "69"]
[Analysis "Houdini 1.5a x64 Hash:640 Time:N/A Fixed Depth:20ply"]
{ Book Moves: }
1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 c5 5. Bxb4 cxb4 6. Bg2 0-0 7. Nf3 d6 8. 0-0 Qe7
9. a3 bxa3 10. Rxa3
{ Analyzed: }
10... b6 { h6 35 20 : a6 35 20 : Rd8 36 20 : Nc6 36 20 }
11. Nc3 { Nc3 37 20 : Nh4 33 20 : d5 25 20 : Qd2 22 20 }
11... Bb7 { Bb7 41 20 : a5 42 20 : Rd8 45 20 : Nc6 67 20 }
12. d5 { d5 40 20 : Qd2 26 20 : Re1 23 20 : Qa4 23 20 }
12... e5 { Rc8 39 20 : exd5 46 20 : e5 50 20 : Nbd7 53 20 }
13. Nh4 { Qd2 54 20 : Nh4 49 20 : Qc1 39 20 : b4 36 20 }
13... g6 { Bc8 50 20 : a6 56 20 : g6 57 20 : Qd8 65 20 }
14. Qd2 { Qc1 63 20 : Qd2 59 20 : f4 33 20 : b3 31 20 }
14... Nh5 { Ne8 54 20 : Qd8 58 20 : a5 61 20 : Nfd7 70 20 }
15. Qh6 { Qh6 106 20 : Rfa1 68 20 : Nf3 57 20 : Rc1 52 20 }
15... f5 { Bc8 105 20 : f5 129 20 : Rd8 133 20 : Nd7 156 20 }
16. e4 { Nxf5 198 20 : e4 136 20 : Rfa1 107 20 : Bh3 90 20 }
16... Ng7 { f4 145 20 : Ng7 190 20 : Qg7 217 20 : fxe4 317 20 }
17. exf5 { exf5 166 20 : Rfa1 123 20 : b4 123 20 : Rd1 95 20 }
17... gxf5 { gxf5 207 20 : Nxf5 225 20 : Rxf5 237 20 : g5 517 20 }
18. Nb5 { Nb5 202 20 : g4 146 20 : b4 136 20 : Rfa1 123 20 }
18... Rf6 { Rf6 219 20 : a5 266 20 : Nd7 332 20 : Ne8 363 20 }
19. Qg5 { Qg5 223 20 : Qe3 63 20 : Qd2 53 20 : Qc1 47 20 }
19... Qf7 { Qf7 224 20 : Qf8 268 20 : Kf7 287 20 : Nd7 400 20 }
20. Rxa7 { Rxa7 221 20 : Nxa7 210 20 : Bh3 143 20 : Bf3 107 20 }
20... Rxa7 { h6 225 20 : Rxa7 225 20 : Nd7 739 20 : Qf8 915 20 }
21. Nxa7 { Nxa7 212 20 : Nxf5 -53 20 : c5 -210 20 : Bh3 -250 20 }
21... f4 { h6 206 20 : Kf8 223 20 : e4 251 20 : f4 253 20 }
22. Ra1 { Ra1 245 20 : Re1 173 20 : Rd1 158 20 : Bf3 136 20 }
22... Na6 { Na6 273 20 : Qf8 279 20 : Kf8 316 20 : Nd7 331 20 }
23. Nc6 { Nc6 281 20 : Qg4 209 20 : Nb5 185 20 : Ra3 160 20 }
23... Bc8 { Qf8 273 20 : Bc8 274 20 : fxg3 385 20 : Nc5 418 20 }
24. Nf5 { Nf5 280 20 : gxf4 278 20 : Nd8 204 20 : Nf3 200 20 }
24... Bxf5 { Kf8 280 20 : Kh8 342 20 : Bxf5 354 20 : fxg3 580 20 }
25. Rxa6 { Rxa6 342 20 : gxf4 35 20 : g4 -50 20 : f3 -58 20 }
25... h6 { h6 354 20 : Kf8 515 20 : Qf8 568 20 : h5 641 20 }
26. Qh4 { Qh4 348 20 : Ra8+ 205 20 : Nxe5 -85 20 : Nd8 -122 20 }
26... Bd3 { Bd3 341 20 : Kh7 356 20 : Bc2 388 20 : Ne8 418 20 }
27. Rxb6 { g4 397 20 : Rxb6 342 20 : Ra7 293 20 : b4 283 20 }
27... e4 { Nf5 342 20 : fxg3 481 20 : e4 531 20 : Qh5 556 20 }
28. Rb7 { Rb7 545 20 : Ne5 479 20 : Bf1 253 20 : h3 244 20 }
28... Qxb7 { Qxb7 533 20 : Qf8 945 20 : e3 1012 20 : fxg3 1123 20 }
29. Qxf6 { Qxf6 521 20 : b4 -637 19 : b3 -791 19 : Bxe4 -812 19 }
29... e3 { e3 534 20 : Qf7 559 20 : Kh7 572 20 : Nf5 849 20 }
30. fxe3 { fxe3 556 20 : Bf1 502 20 : Ne7+ 246 20 : Qd8+ 194 20 }
30... fxe3 { Qf7 561 20 : Kh7 603 20 : Qa6 654 20 : Qa8 654 20 }
31. Ne7+ { Ne7+ 1968 20 : Bf1 610 20 : Qd8+ 514 20 : b4 435 20 }
31... Kh7 { Kh7 1197 4 : Qxe7 1541 3 : Kh8 #2 3 }
32. Qf8 { Qf8 2049 20 : Bf1 546 20 : Qf7 468 20 : Qc3 286 20 }
32... h5 { Qxe7 #8 9 : Qa8 #8 9 : Qc8 #8 9 : Qb8 #8 9 }
33. Qg8+ { Qg8+ #5 20 : Bf1 545 20 : h4 517 20 : Bf3 490 20 }
33... Kh6 { Kh6 #4 4 }
34. Qh8+ { Qh8+ #4 20 : Qf7 255 20 : Qf8 255 20 : Qd8 35 20 }
34... Bh7 { Bh7 #3 4 : Kg5 #2 3 }
35. Be4 { Be4 #3 20 : Ng8+ 2130 20 : Qf8 1628 20 : Qd8 582 20 }
1-0
{ Game Summary }
{ White: Borislav Ivanov }
{ Top 1 Match: 21/25 ( 84.0% )
{ Top 2 Match: 25/25 ( 100.0% )
{ Top 3 Match: 25/25 ( 100.0% )
{ Top 4 Match: 25/25 ( 100.0% )
{ Black: Bojan Kurajica }
{ Top 1 Match: 12/25 ( 48.0% )
{ Top 2 Match: 16/25 ( 64.0% )
{ Top 3 Match: 20/25 ( 80.0% )
{ Top 4 Match: 21/25 ( 84.0% )
As you can see, the 4 moves in which Ivanov didn't play the top engine choice
13. Nh4 { Qd2 54 20 : Nh4 49 20 : Qc1 39 20 : b4 36 20 }
14. Qd2 { Qc1 63 20 : Qd2 59 20 : f4 33 20 : b3 31 20 }
16. e4 { Nxf5 198 20 : e4 136 20 : Rfa1 107 20 : Bh3 90 20 }
27. Rxb6 { g4 397 20 : Rxb6 342 20 : Ra7 293 20 : b4 283 20 }
he instead played the 2nd choice move with very little difference in score...
Next we see the game Ivanov lost to Predojevic.
The game that did not have the live broadcast.
You will see quite a dip in form and a more 'normal' match up percentage.
[Event "19th Open A"]
[Site "Zadar"]
[Date "2012.12.21"]
[Round "8.1"]
[White "Borislav Ivanov"]
[Black "Borki Predojevic"]
[Result "0-1"]
[ECO "D11"]
[WhiteElo "2227"]
[BlackElo "2600"]
[PlyCount "68"]
[Analysis "Houdini 1.5a x64 Hash:640 Time:N/A Max Depth:20ply"]
{ Book Moves: }
1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Qc2 dxc4 5. Qxc4 Bg4 6. Ne5 Be6 7. Qd3 Nbd7
{ Analyzed: }
8. Nf3 { Nf3 6 20 : f4 -14 20 : Nxd7 -17 20 : Nd2 -24 20 }
8... Bg4 { Bg4 0 20 : Qb6 5 20 : Qc7 6 20 : Nb6 13 20 }
9. Nc3 { Nc3 0 20 : h3 -3 20 : Nbd2 -5 20 : Bd2 -10 20 }
9... e6 { Qb6 -2 20 : Qc7 0 20 : Qa5 8 20 : e6 12 20 }
10. g3 { e4 7 20 : h3 5 20 : a3 -5 20 : Bf4 -9 20 }
10... Be7 { Be7 -6 20 : h6 -6 20 : Rc8 -2 20 : Bb4 0 20 }
11. Bg2 { Bg2 -5 20 : h3 -11 20 : a3 -18 20 : Bf4 -19 20 }
11... 0-0 { 0-0 -5 20 : Bf5 -3 20 : Qb6 0 20 : Rc8 3 20 }
12. 0-0 { 0-0 0 20 : a3 -18 20 : h3 -18 20 : Qd2 -19 20 }
12... Rc8 { Qb6 0 20 : Rc8 0 20 : Bf5 0 20 : h6 9 20 }
13. Rd1 { Rd1 12 20 : Re1 0 20 : e4 -3 20 : Qc2 -4 20 }
13... Qa5 { h6 7 20 : Bh5 14 20 : Bb4 16 20 : Qa5 16 20 }
14. Bd2 { h3 18 20 : Bd2 10 20 : Bf4 6 20 : Nh4 0 20 }
14... Rfd8 { Qb6 7 20 : Rcd8 13 20 : Rfd8 13 20 : Bh5 16 20 }
15. h3 { h3 15 20 : Nh4 2 20 : Rac1 -7 20 : Qc2 -11 20 }
15... Bh5 { Bh5 12 20 : Bxf3 24 20 : Bf5 46 20 : Nc5 217 20 }
16. Qc4 { e4 11 20 : a3 0 20 : g4 0 20 : Rac1 0 20 }
16... b5 { b5 -24 20 : Qb6 -8 20 : h6 -3 20 : Bg6 -2 20 }
17. Qb3 { Qd3 -24 20 : Qb3 -28 20 : b4 -70 20 : Nd5 -203 20 }
17... Qb6 { b4 -20 20 : Qb6 -19 20 : Qa6 -4 20 : Qc7 10 20 }
18. g4 { Bg5 -14 20 : Rac1 -17 20 : a3 -18 20 : Bf4 -27 20 }
18... Bg6 { Bg6 -21 20 : Bxg4 153 20 : Nxg4 159 20 : e5 249 20 }
19. Bf4 { g5 -24 20 : Nh4 -30 20 : a3 -31 20 : Rac1 -37 20 }
19... a5 { b4 -28 20 : a5 -22 20 : h6 -20 20 : Nd5 -17 20 }
20. a3 { Nh4 -19 20 : Ne5 -33 20 : a3 -37 20 : Rdc1 -44 20 }
20... a4 { a4 -34 20 : h6 -32 20 : Qa6 -21 20 : Nd5 -21 20 }
21. Qa2 { Qa2 -38 20 : Nxa4 -298 20 : Bc7 -543 20 : Bd6 -865 20 }
21... Bc2 { Nd5 -43 20 : h6 -34 20 : Bc2 -33 20 : h5 -32 20 }
22. Rd2 { Rdc1 -34 20 : Re1 -45 20 : Rd2 -63 20 : Rf1 -70 20 }
22... Bb3 { Bb3 -54 20 : Nd5 -35 20 : Bg6 -31 20 : Be4 -8 20 }
23. Qb1 { Qb1 -62 20 : Nxa4 -442 20 : Bc7 -570 20 : g5 -632 20 }
23... c5 { Nd5 -57 20 : h6 -46 20 : h5 -43 20 : c5 -39 20 }
24. e3 { e4 -33 20 : Qe1 -39 20 : Be3 -39 20 : e3 -45 20 }
24... b4 { Nd5 -43 20 : h6 -35 20 : h5 -32 20 : Bc4 -31 20 }
25. axb4 { axb4 -2 20 : dxc5 -60 20 : Ne2 -83 20 : Ne4 -127 20 }
25... Qxb4 { Qxb4 0 20 : cxb4 0 20 : c4 27 20 : cxd4 38 20 }
26. Ne5 { dxc5 0 20 : Bg5 -26 20 : e4 -27 20 : Ne1 -28 20 }
26... Nxe5 { Nxe5 -72 20 : g5 -31 20 : Nd5 -23 20 : Nb6 39 20 }
27. Bxe5 { Bxe5 -84 20 : Bh2 -585 20 : Bg3 -594 20 : g5 -622 20 }
27... Nd7 { Nd7 -101 20 : cxd4 -89 20 : Qa5 -61 20 : h6 -30 20 }
28. Bg3 { Bf4 -88 20 : Bg3 -101 20 : Qe1 -115 20 : Bh2 -115 20 }
28... Nb6 { Nb6 -114 20 : Nf6 -60 20 : h5 -45 20 : Bf6 -27 20 }
29. Qe4 { Be5 -100 20 : Re2 -120 20 : Be4 -130 20 : Bf1 -146 20 }
29... Nc4 { Nc4 -293 20 : a3 -159 20 : Qa5 -134 20 : cxd4 -89 20 }
30. Re2 { Re2 -290 20 : Rdd1 -514 20 : Qd3 -673 20 : Rd3 -689 20 }
30... cxd4 { cxd4 -318 20 : Nxb2 -229 20 : Bf6 -137 20 : a3 -124 20 }
31. exd4 { exd4 -318 20 : Na2 -629 20 : Nxa4 -674 20 : Nd5 -801 20 }
31... Nxb2 { Nxb2 -318 20 : a3 -184 20 : h6 -128 20 : Bf8 -117 20 }
32. Rxb2 { Na2 -322 20 : Nb5 -327 20 : Rxb2 -369 20 : Qb7 -414 20 }
32... Qxc3 { Rxc3 -362 20 : Qxc3 -360 20 : Rxd4 -180 20 : a3 -153 20 }
33. Qe2 { Qe2 -363 20 : Rab1 -552 20 : Rbb1 -554 20 : Qb1 -646 20 }
33... Qxd4 { a3 -365 20 : Bf6 -346 20 : Qxd4 -343 20 : h6 -325 20 }
34. Be5 { Be5 -348 20 : Rbb1 -368 20 : Re1 -449 20 : Rab1 -472 20 }
34... Qd3 { Qc5 -358 20 : Qd3 -353 20 : Qc4 -349 20 : Qd7 -334 20 }
0-1
{ Game Summary }
{ White: Borislav Ivanov }
{ Top 1 Match: 14/27 ( 51.9% )
{ Top 2 Match: 17/27 ( 63.0% )
{ Top 3 Match: 20/27 ( 74.1% )
{ Top 4 Match: 21/27 ( 77.8% )
{ Black: Borki Predojevic }
{ Top 1 Match: 15/27 ( 55.6% )
{ Top 2 Match: 20/27 ( 74.1% )
{ Top 3 Match: 23/27 ( 85.2% )
{ Top 4 Match: 26/27 ( 96.3% )
Of course it's not 100% conclusive but you can see where all the fuss is coming from.
Apparently he scored well but with a lower computer match up
than his opponents.
(My joke about first to turn off their computer will be will be KIng is coming true.)
One of lads who has been doing this for years on Red Hot Pawn
supplied Houdini engine anlaysis of the Ivanov - Kurajica game.
One game is never enough but this is one of the highest match ups
I've seen in a GM game. No wonder everyone is suspicious.
I'll give the full analysis as posted on RHP. Apparently it takes a couple
of hourse to do this correctly.
[Event "19th Open A"]
[Site "Zadar"]
[Date "2012.12.17"]
[Round "3.12"]
[White "Borislav Ivanov"]
[Black "Bojan Kurajica"]
[Result "1-0"]
[ECO "E00"]
[WhiteElo "2227"]
[BlackElo "2565"]
[PlyCount "69"]
[Analysis "Houdini 1.5a x64 Hash:640 Time:N/A Fixed Depth:20ply"]
{ Book Moves: }
1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 c5 5. Bxb4 cxb4 6. Bg2 0-0 7. Nf3 d6 8. 0-0 Qe7
9. a3 bxa3 10. Rxa3
{ Analyzed: }
10... b6 { h6 35 20 : a6 35 20 : Rd8 36 20 : Nc6 36 20 }
11. Nc3 { Nc3 37 20 : Nh4 33 20 : d5 25 20 : Qd2 22 20 }
11... Bb7 { Bb7 41 20 : a5 42 20 : Rd8 45 20 : Nc6 67 20 }
12. d5 { d5 40 20 : Qd2 26 20 : Re1 23 20 : Qa4 23 20 }
12... e5 { Rc8 39 20 : exd5 46 20 : e5 50 20 : Nbd7 53 20 }
13. Nh4 { Qd2 54 20 : Nh4 49 20 : Qc1 39 20 : b4 36 20 }
13... g6 { Bc8 50 20 : a6 56 20 : g6 57 20 : Qd8 65 20 }
14. Qd2 { Qc1 63 20 : Qd2 59 20 : f4 33 20 : b3 31 20 }
14... Nh5 { Ne8 54 20 : Qd8 58 20 : a5 61 20 : Nfd7 70 20 }
15. Qh6 { Qh6 106 20 : Rfa1 68 20 : Nf3 57 20 : Rc1 52 20 }
15... f5 { Bc8 105 20 : f5 129 20 : Rd8 133 20 : Nd7 156 20 }
16. e4 { Nxf5 198 20 : e4 136 20 : Rfa1 107 20 : Bh3 90 20 }
16... Ng7 { f4 145 20 : Ng7 190 20 : Qg7 217 20 : fxe4 317 20 }
17. exf5 { exf5 166 20 : Rfa1 123 20 : b4 123 20 : Rd1 95 20 }
17... gxf5 { gxf5 207 20 : Nxf5 225 20 : Rxf5 237 20 : g5 517 20 }
18. Nb5 { Nb5 202 20 : g4 146 20 : b4 136 20 : Rfa1 123 20 }
18... Rf6 { Rf6 219 20 : a5 266 20 : Nd7 332 20 : Ne8 363 20 }
19. Qg5 { Qg5 223 20 : Qe3 63 20 : Qd2 53 20 : Qc1 47 20 }
19... Qf7 { Qf7 224 20 : Qf8 268 20 : Kf7 287 20 : Nd7 400 20 }
20. Rxa7 { Rxa7 221 20 : Nxa7 210 20 : Bh3 143 20 : Bf3 107 20 }
20... Rxa7 { h6 225 20 : Rxa7 225 20 : Nd7 739 20 : Qf8 915 20 }
21. Nxa7 { Nxa7 212 20 : Nxf5 -53 20 : c5 -210 20 : Bh3 -250 20 }
21... f4 { h6 206 20 : Kf8 223 20 : e4 251 20 : f4 253 20 }
22. Ra1 { Ra1 245 20 : Re1 173 20 : Rd1 158 20 : Bf3 136 20 }
22... Na6 { Na6 273 20 : Qf8 279 20 : Kf8 316 20 : Nd7 331 20 }
23. Nc6 { Nc6 281 20 : Qg4 209 20 : Nb5 185 20 : Ra3 160 20 }
23... Bc8 { Qf8 273 20 : Bc8 274 20 : fxg3 385 20 : Nc5 418 20 }
24. Nf5 { Nf5 280 20 : gxf4 278 20 : Nd8 204 20 : Nf3 200 20 }
24... Bxf5 { Kf8 280 20 : Kh8 342 20 : Bxf5 354 20 : fxg3 580 20 }
25. Rxa6 { Rxa6 342 20 : gxf4 35 20 : g4 -50 20 : f3 -58 20 }
25... h6 { h6 354 20 : Kf8 515 20 : Qf8 568 20 : h5 641 20 }
26. Qh4 { Qh4 348 20 : Ra8+ 205 20 : Nxe5 -85 20 : Nd8 -122 20 }
26... Bd3 { Bd3 341 20 : Kh7 356 20 : Bc2 388 20 : Ne8 418 20 }
27. Rxb6 { g4 397 20 : Rxb6 342 20 : Ra7 293 20 : b4 283 20 }
27... e4 { Nf5 342 20 : fxg3 481 20 : e4 531 20 : Qh5 556 20 }
28. Rb7 { Rb7 545 20 : Ne5 479 20 : Bf1 253 20 : h3 244 20 }
28... Qxb7 { Qxb7 533 20 : Qf8 945 20 : e3 1012 20 : fxg3 1123 20 }
29. Qxf6 { Qxf6 521 20 : b4 -637 19 : b3 -791 19 : Bxe4 -812 19 }
29... e3 { e3 534 20 : Qf7 559 20 : Kh7 572 20 : Nf5 849 20 }
30. fxe3 { fxe3 556 20 : Bf1 502 20 : Ne7+ 246 20 : Qd8+ 194 20 }
30... fxe3 { Qf7 561 20 : Kh7 603 20 : Qa6 654 20 : Qa8 654 20 }
31. Ne7+ { Ne7+ 1968 20 : Bf1 610 20 : Qd8+ 514 20 : b4 435 20 }
31... Kh7 { Kh7 1197 4 : Qxe7 1541 3 : Kh8 #2 3 }
32. Qf8 { Qf8 2049 20 : Bf1 546 20 : Qf7 468 20 : Qc3 286 20 }
32... h5 { Qxe7 #8 9 : Qa8 #8 9 : Qc8 #8 9 : Qb8 #8 9 }
33. Qg8+ { Qg8+ #5 20 : Bf1 545 20 : h4 517 20 : Bf3 490 20 }
33... Kh6 { Kh6 #4 4 }
34. Qh8+ { Qh8+ #4 20 : Qf7 255 20 : Qf8 255 20 : Qd8 35 20 }
34... Bh7 { Bh7 #3 4 : Kg5 #2 3 }
35. Be4 { Be4 #3 20 : Ng8+ 2130 20 : Qf8 1628 20 : Qd8 582 20 }
1-0
{ Game Summary }
{ White: Borislav Ivanov }
{ Top 1 Match: 21/25 ( 84.0% )
{ Top 2 Match: 25/25 ( 100.0% )
{ Top 3 Match: 25/25 ( 100.0% )
{ Top 4 Match: 25/25 ( 100.0% )
{ Black: Bojan Kurajica }
{ Top 1 Match: 12/25 ( 48.0% )
{ Top 2 Match: 16/25 ( 64.0% )
{ Top 3 Match: 20/25 ( 80.0% )
{ Top 4 Match: 21/25 ( 84.0% )
As you can see, the 4 moves in which Ivanov didn't play the top engine choice
13. Nh4 { Qd2 54 20 : Nh4 49 20 : Qc1 39 20 : b4 36 20 }
14. Qd2 { Qc1 63 20 : Qd2 59 20 : f4 33 20 : b3 31 20 }
16. e4 { Nxf5 198 20 : e4 136 20 : Rfa1 107 20 : Bh3 90 20 }
27. Rxb6 { g4 397 20 : Rxb6 342 20 : Ra7 293 20 : b4 283 20 }
he instead played the 2nd choice move with very little difference in score...
Next we see the game Ivanov lost to Predojevic.
The game that did not have the live broadcast.
You will see quite a dip in form and a more 'normal' match up percentage.
[Event "19th Open A"]
[Site "Zadar"]
[Date "2012.12.21"]
[Round "8.1"]
[White "Borislav Ivanov"]
[Black "Borki Predojevic"]
[Result "0-1"]
[ECO "D11"]
[WhiteElo "2227"]
[BlackElo "2600"]
[PlyCount "68"]
[Analysis "Houdini 1.5a x64 Hash:640 Time:N/A Max Depth:20ply"]
{ Book Moves: }
1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Qc2 dxc4 5. Qxc4 Bg4 6. Ne5 Be6 7. Qd3 Nbd7
{ Analyzed: }
8. Nf3 { Nf3 6 20 : f4 -14 20 : Nxd7 -17 20 : Nd2 -24 20 }
8... Bg4 { Bg4 0 20 : Qb6 5 20 : Qc7 6 20 : Nb6 13 20 }
9. Nc3 { Nc3 0 20 : h3 -3 20 : Nbd2 -5 20 : Bd2 -10 20 }
9... e6 { Qb6 -2 20 : Qc7 0 20 : Qa5 8 20 : e6 12 20 }
10. g3 { e4 7 20 : h3 5 20 : a3 -5 20 : Bf4 -9 20 }
10... Be7 { Be7 -6 20 : h6 -6 20 : Rc8 -2 20 : Bb4 0 20 }
11. Bg2 { Bg2 -5 20 : h3 -11 20 : a3 -18 20 : Bf4 -19 20 }
11... 0-0 { 0-0 -5 20 : Bf5 -3 20 : Qb6 0 20 : Rc8 3 20 }
12. 0-0 { 0-0 0 20 : a3 -18 20 : h3 -18 20 : Qd2 -19 20 }
12... Rc8 { Qb6 0 20 : Rc8 0 20 : Bf5 0 20 : h6 9 20 }
13. Rd1 { Rd1 12 20 : Re1 0 20 : e4 -3 20 : Qc2 -4 20 }
13... Qa5 { h6 7 20 : Bh5 14 20 : Bb4 16 20 : Qa5 16 20 }
14. Bd2 { h3 18 20 : Bd2 10 20 : Bf4 6 20 : Nh4 0 20 }
14... Rfd8 { Qb6 7 20 : Rcd8 13 20 : Rfd8 13 20 : Bh5 16 20 }
15. h3 { h3 15 20 : Nh4 2 20 : Rac1 -7 20 : Qc2 -11 20 }
15... Bh5 { Bh5 12 20 : Bxf3 24 20 : Bf5 46 20 : Nc5 217 20 }
16. Qc4 { e4 11 20 : a3 0 20 : g4 0 20 : Rac1 0 20 }
16... b5 { b5 -24 20 : Qb6 -8 20 : h6 -3 20 : Bg6 -2 20 }
17. Qb3 { Qd3 -24 20 : Qb3 -28 20 : b4 -70 20 : Nd5 -203 20 }
17... Qb6 { b4 -20 20 : Qb6 -19 20 : Qa6 -4 20 : Qc7 10 20 }
18. g4 { Bg5 -14 20 : Rac1 -17 20 : a3 -18 20 : Bf4 -27 20 }
18... Bg6 { Bg6 -21 20 : Bxg4 153 20 : Nxg4 159 20 : e5 249 20 }
19. Bf4 { g5 -24 20 : Nh4 -30 20 : a3 -31 20 : Rac1 -37 20 }
19... a5 { b4 -28 20 : a5 -22 20 : h6 -20 20 : Nd5 -17 20 }
20. a3 { Nh4 -19 20 : Ne5 -33 20 : a3 -37 20 : Rdc1 -44 20 }
20... a4 { a4 -34 20 : h6 -32 20 : Qa6 -21 20 : Nd5 -21 20 }
21. Qa2 { Qa2 -38 20 : Nxa4 -298 20 : Bc7 -543 20 : Bd6 -865 20 }
21... Bc2 { Nd5 -43 20 : h6 -34 20 : Bc2 -33 20 : h5 -32 20 }
22. Rd2 { Rdc1 -34 20 : Re1 -45 20 : Rd2 -63 20 : Rf1 -70 20 }
22... Bb3 { Bb3 -54 20 : Nd5 -35 20 : Bg6 -31 20 : Be4 -8 20 }
23. Qb1 { Qb1 -62 20 : Nxa4 -442 20 : Bc7 -570 20 : g5 -632 20 }
23... c5 { Nd5 -57 20 : h6 -46 20 : h5 -43 20 : c5 -39 20 }
24. e3 { e4 -33 20 : Qe1 -39 20 : Be3 -39 20 : e3 -45 20 }
24... b4 { Nd5 -43 20 : h6 -35 20 : h5 -32 20 : Bc4 -31 20 }
25. axb4 { axb4 -2 20 : dxc5 -60 20 : Ne2 -83 20 : Ne4 -127 20 }
25... Qxb4 { Qxb4 0 20 : cxb4 0 20 : c4 27 20 : cxd4 38 20 }
26. Ne5 { dxc5 0 20 : Bg5 -26 20 : e4 -27 20 : Ne1 -28 20 }
26... Nxe5 { Nxe5 -72 20 : g5 -31 20 : Nd5 -23 20 : Nb6 39 20 }
27. Bxe5 { Bxe5 -84 20 : Bh2 -585 20 : Bg3 -594 20 : g5 -622 20 }
27... Nd7 { Nd7 -101 20 : cxd4 -89 20 : Qa5 -61 20 : h6 -30 20 }
28. Bg3 { Bf4 -88 20 : Bg3 -101 20 : Qe1 -115 20 : Bh2 -115 20 }
28... Nb6 { Nb6 -114 20 : Nf6 -60 20 : h5 -45 20 : Bf6 -27 20 }
29. Qe4 { Be5 -100 20 : Re2 -120 20 : Be4 -130 20 : Bf1 -146 20 }
29... Nc4 { Nc4 -293 20 : a3 -159 20 : Qa5 -134 20 : cxd4 -89 20 }
30. Re2 { Re2 -290 20 : Rdd1 -514 20 : Qd3 -673 20 : Rd3 -689 20 }
30... cxd4 { cxd4 -318 20 : Nxb2 -229 20 : Bf6 -137 20 : a3 -124 20 }
31. exd4 { exd4 -318 20 : Na2 -629 20 : Nxa4 -674 20 : Nd5 -801 20 }
31... Nxb2 { Nxb2 -318 20 : a3 -184 20 : h6 -128 20 : Bf8 -117 20 }
32. Rxb2 { Na2 -322 20 : Nb5 -327 20 : Rxb2 -369 20 : Qb7 -414 20 }
32... Qxc3 { Rxc3 -362 20 : Qxc3 -360 20 : Rxd4 -180 20 : a3 -153 20 }
33. Qe2 { Qe2 -363 20 : Rab1 -552 20 : Rbb1 -554 20 : Qb1 -646 20 }
33... Qxd4 { a3 -365 20 : Bf6 -346 20 : Qxd4 -343 20 : h6 -325 20 }
34. Be5 { Be5 -348 20 : Rbb1 -368 20 : Re1 -449 20 : Rab1 -472 20 }
34... Qd3 { Qc5 -358 20 : Qd3 -353 20 : Qc4 -349 20 : Qd7 -334 20 }
0-1
{ Game Summary }
{ White: Borislav Ivanov }
{ Top 1 Match: 14/27 ( 51.9% )
{ Top 2 Match: 17/27 ( 63.0% )
{ Top 3 Match: 20/27 ( 74.1% )
{ Top 4 Match: 21/27 ( 77.8% )
{ Black: Borki Predojevic }
{ Top 1 Match: 15/27 ( 55.6% )
{ Top 2 Match: 20/27 ( 74.1% )
{ Top 3 Match: 23/27 ( 85.2% )
{ Top 4 Match: 26/27 ( 96.3% )
Of course it's not 100% conclusive but you can see where all the fuss is coming from.
-
John Upham
- Posts: 7224
- Joined: Wed Apr 04, 2007 10:29 am
- Location: Cove, Hampshire, England.
Re: Chess Player Strip Searched
A petition related to this matter has been launched by Emil Sutovsky (on behalf of the Association of Chess Professionals) at
http://www.chessprofessionals.org/node/369
http://www.chessprofessionals.org/node/369
British Chess News : britishchessnews.com
Twitter: @BritishChess
Facebook: facebook.com/groups/britishchess
Twitter: @BritishChess
Facebook: facebook.com/groups/britishchess
-
Matthew Turner
- Posts: 3604
- Joined: Fri May 16, 2008 11:54 am
Re: Chess Player Strip Searched
I think the research piece cited by Mick Norris is a very welcome development
http://www.cse.buffalo.edu/~regan/chess ... report.pdf
It seeks to analyse the use of comuters in a very statistical and academic way. I am sure that this provides the basis for evaluating future cases, but there are two things I think have to be borne in mind
1. The author's own comment "my policy to date has been that statistical evidence is secondary to physical or observational evidence of cheating when judging a case."
2. Historical analysis of games is a deeply flawed comparison, because players increasingly use engines to prepare/analyse their games, so a higher incidence of 'computer moves' is to be expected.
http://www.cse.buffalo.edu/~regan/chess ... report.pdf
It seeks to analyse the use of comuters in a very statistical and academic way. I am sure that this provides the basis for evaluating future cases, but there are two things I think have to be borne in mind
1. The author's own comment "my policy to date has been that statistical evidence is secondary to physical or observational evidence of cheating when judging a case."
2. Historical analysis of games is a deeply flawed comparison, because players increasingly use engines to prepare/analyse their games, so a higher incidence of 'computer moves' is to be expected.
-
Roger de Coverly
- Posts: 21320
- Joined: Tue Apr 15, 2008 2:51 pm
Re: Chess Player Strip Searched
I wonder if they've ever tested whether their test can actually detect games known to have been played by computer engines. In other words go back ten years or more and test the computer championships. Perhaps they can, because the test seemed to be about style of play as well as accuracy. The point being that in a position where a player already has an advantage or a decisive advantage, that the engines will continue to play the most critical moves whilst a human player will often choose the simplest. In a position with an assessed 2.5 pawn advantage, the engine will strive to increase it to 3, whilst a human will be content to allow it to drop to 2, provided the position becomes simple to play, in other words there are many moves which retain an advantage.Matthew Turner wrote: 2. Historical analysis of games is a deeply flawed comparison, because players increasingly use engines to prepare/analyse their games, so a higher incidence of 'computer moves' is to be expected.