Alekhine Memorial

[Christopher Kreuzer]

Uh, wrong tournament thread?

In the Alekhine Memorial, looks like Gelfand and Vachier-Lagrave will lead, with Adams and Anand a half point behind.

[Andrew Bak]

Good point - I've posted in the Zug thread.

[Mick Norris]

Vachier-Lagrave has just lost, so has been caught by Anand, Adams, and Aronian on 4.5 with Fressinet and Vitugov on 4

Gelfand (4.5) still playing against Kramnik (3)

[LawrenceCooper]

Round 09 – May 01 2013, 14:00h

Peter Svidler 2747 v Laurent Fressinet 2706
Boris Gelfand 2739 v Viswanathan Anand 2783
Michael Adams 2727 v Vladimir Kramnik 2801
Nikita Vitiugov 2712 v Ding Liren 2707
Levon Aronian 2809 v Maxime Vachier-Lagrave 2722

Scores: Gelfand 4.5/8, Adams, Anand, Aronian, Vachier 4.5, Fressinet & Vitiugov 4, Kramnik 3/8, Ding 3, Svidler 2.5

In the unlikely event that Gelfand loses to Kramnik there is a possibility of a seven way tie for first on 5/9 tomorrow

[Mick Norris]

In the unlikely event that Gelfand loses to Kramnik there is a possibility of a seven way tie for first on 5/9 tomorrow

Well, he has reached the time control at move 60, but they were both into their last minute - I assume Kramnik has some chance of winning?

[Christopher Kreuzer]

In the unlikely event that Gelfand loses to Kramnik there is a possibility of a seven way tie for first on 5/9 tomorrow

Well, he has reached the time control at move 60, but they were both into their last minute - I assume Kramnik has some chance of winning?

Kramnik missed a nice line on move 63. The Houdini line starting 63.Ra8 looks winning, though I'm not surprised it was missed. The game looks drawish now. EDIT: having said that, the computer is looking at another long forcing line that gives +1.18 at the moment. I never knew such positions could be so interesting.

[LawrenceCooper]

In the unlikely event that Gelfand loses to Kramnik there is a possibility of a seven way tie for first on 5/9 tomorrow

Well, he has reached the time control at move 60, but they were both into their last minute - I assume Kramnik has some chance of winning?

Kramnik missed a nice line on move 63. The Houdini line starting 63.Ra8 looks winning, though I'm not surprised it was missed. The game looks drawish now. EDIT: having said that, the computer is looking at another long forcing line that gives +1.18 at the moment. I never knew such positions could be so interesting.

Some of these "winning" lines that are in excess of +1 aren't necessarily winning but reflect that white is an exchange up.

[Christopher Kreuzer]

Some of these "winning" lines that are in excess of +1 aren't necessarily winning but reflect that white is an exchange up.

Yeah, but those mating nets look dangerous. Still, I suppose if it was a mating net, the computer would throw a fit and go +20 or something.

[Mick Norris]

Round 09 – May 01 2013, 14:00h

Peter Svidler 2747 v Laurent Fressinet 2706
Boris Gelfand 2739 v Viswanathan Anand 2783
Michael Adams 2727 v Vladimir Kramnik 2801
Nikita Vitiugov 2712 v Ding Liren 2707
Levon Aronian 2809 v Maxime Vachier-Lagrave 2722

Scores: Gelfand 4.5/8, Adams, Anand, Aronian, Vachier 4.5, Fressinet & Vitiugov 4, Kramnik 3/8, Ding 3, Svidler 2.5

In the unlikely event that Gelfand loses to Kramnik there is a possibility of a seven way tie for first on 5/9 tomorrow

Gelfand has drawn

The tiebreaks are interesting;
In case of a tie the following auxiliary scorings are used for players’ places identification:
 Maximum number of games played with black pieces;
 Maximum number of wins;
 Direct encounter result;
 Koja coefficient;
 Sonneborn-Berger score.

[Mick Norris]

What is a Koja coefficient?

[Kevin Thurlow]

"What is a Koja coefficient?"

It's normally spelt "Koya"

see below from FIDE Handbook...

"2.1.3 The Koya System for Round Robin Tournaments

This is the number of points achieved against all opponents who have achieved 50 % or more.

2.1.3.1 The Koya System extended

The Koya System may be extended step by step to include score groups with less than 50 % "

You extend it if it's still level.

[Christopher Kreuzer]

Kramnik missed a nice line on move 63. The Houdini line starting 63.Ra8 looks winning, though I'm not surprised it was missed. The game looks drawish now. EDIT: having said that, the computer is looking at another long forcing line that gives +1.18 at the moment. I never knew such positions could be so interesting.

Some of these "winning" lines that are in excess of +1 aren't necessarily winning but reflect that white is an exchange up.

Turns out there was a win there, though, at least according to the Chessbase report: "Kramnik missed a win on move 64 with Rh8!" Worth having a look at that, if only as a reminder that tactical points are easily missed in positions like that. Who here would have considered that?

To pick up on Mick's question, I've no idea what that Koja coefficient is, though Googling found another chess forum where someone else asked the same question, but on answer there either as yet. Maybe something got lost in translation (ah, I see Kevin has just answered the question).

[Mick Norris]

"What is a Koja coefficient?"

It's normally spelt "Koya"

see below from FIDE Handbook...

"2.1.3 The Koya System for Round Robin Tournaments

This is the number of points achieved against all opponents who have achieved 50 % or more.

2.1.3.1 The Koya System extended

The Koya System may be extended step by step to include score groups with less than 50 % "

You extend it if it's still level.

Kevin

Thank you

Wonder why it wasn't there for the Candidates

[Mick Norris]

Round 09 – May 01 2013, 14:00h

Peter Svidler 2747 v Laurent Fressinet 2706
Boris Gelfand 2739 v Viswanathan Anand 2783
Michael Adams 2727 v Vladimir Kramnik 2801
Nikita Vitiugov 2712 v Ding Liren 2707
Levon Aronian 2809 v Maxime Vachier-Lagrave 2722

Scores: Gelfand 4.5/8, Adams, Anand, Aronian, Vachier 4.5, Fressinet & Vitiugov 4, Kramnik 3/8, Ding 3, Svidler 2.5

In the unlikely event that Gelfand loses to Kramnik there is a possibility of a seven way tie for first on 5/9 tomorrow

Gelfand drew yesterday and today but has been overtaken on tiebreak by Aronian who won - other games drawn apart from Adams trying to hold draw against Kramnik

[Christopher Kreuzer]

Is it me, or has Mickey nearly always been in the last game still going on, or at least has played many more moves than the other players? Average of 54 moves over the nine games so far at move 50 (the average will go up by a ninth every additional move in this last game that is still going on). Complex position.