Search found 146 matches

by Jesper Norgaard
Mon Apr 16, 2018 10:46 pm
Forum: General Chat
Topic: Evil puzzle
Replies: 19
Views: 1892

Re: Evil puzzle

This is the suggestion: "The game is won by the player who has checkmated his opponent’s king. This immediately ends the game, provided that the last move of each player producing the checkmate position was in accordance with Article 3 and Articles 4.2 – 4.7." There is a couple of problems with this...
by Jesper Norgaard
Sun Apr 15, 2018 5:33 pm
Forum: General Chat
Topic: Evil puzzle
Replies: 19
Views: 1892

Re: Evil puzzle

The relevant article is 5.1.1: "The game is won by the player who has checkmated his opponent’s king. This immediately ends the game, provided that the move producing the checkmate position was in accordance with Article 3 and Articles 4.2 – 4.7." Geurt Gijssen suggested that to be a valid checkmate...
by Jesper Norgaard
Sun Apr 15, 2018 2:53 pm
Forum: General Chat
Topic: Evil puzzle
Replies: 19
Views: 1892

Re: Evil puzzle

I'm not sure that I've understood the 'rules' but how about 1.c4 e6 2. e3 Kc2. Assuming that 3.Qxc2 is illegal because you can't take a king, then there appear to be six moves (Qe2, Qf3, Qg4, Qh5, Bd3, Ne2) which don't result in checkmate and another twenty which do. I get 19 moves that are checkma...
by Jesper Norgaard
Sun Apr 15, 2018 2:03 am
Forum: General Chat
Topic: Evil puzzle
Replies: 19
Views: 1892

Re: Evil puzzle

1.c4 e6 2.Nf3 Kc2

There are 21 checkmate moves:
a3 a4 b3 b4 c5 d3 d4 e3 e4 g3 g4 h3 h4 Nd4 Ne5 Ng5 Nh4 Ng1 Rg1 Na3 Nc3

However, astonishingly there are no legal moves that are not checkmate!
by Jesper Norgaard
Sun Apr 15, 2018 1:02 am
Forum: General Chat
Topic: Evil puzzle
Replies: 19
Views: 1892

Re: Evil puzzle

My intended solution was 1.d4 f5 (a Dutch Defence!) 2.Nc3 Ke4
19 checkmate moves:
a3 a4 b3 b4 e3 f3 f4 g3 g4 h3 h4 Nf3 Nh3 Qd2 Qd3 Be3 Bg5 Bh6 Rb1

Actually there are 8 moves that are not checkmate (I forgot Kd2 and Bd2):
Nd5 Nb5 Na4 Nb1 Bf4 d5 Kd2 Bd2
by Jesper Norgaard
Sun Apr 15, 2018 12:57 am
Forum: General Chat
Topic: Evil puzzle
Replies: 19
Views: 1892

Re: Evil puzzle

Chris Goodall wrote:
Sat Apr 14, 2018 10:37 pm
Why not go 1.a4 g5 2.h4 Kxc2 and give White some extra checkmating moves.
I get also 19 moves that are checkmate:

a5 b3 b4 d3 d4 e3 e4 f3 f4 g3 g4 hxg5 h5 Na3 Nc3 Nf3 Nh3 Rh2 Rh3

A big problem is that Ra2 and Ra3 are not checkmate since Black can play Kxb1
by Jesper Norgaard
Sun Apr 15, 2018 12:51 am
Forum: General Chat
Topic: Evil puzzle
Replies: 19
Views: 1892

Re: Evil puzzle

I'm not sure that I've understood the 'rules' but how about 1.c4 e6 2. e3 Kc2. Assuming that 3.Qxc2 is illegal because you can't take a king, then there appear to be six moves (Qe2, Qf3, Qg4, Qh5, Bd3, Ne2) which don't result in checkmate and another twenty which do. I get 19 moves that are checkma...
by Jesper Norgaard
Sat Apr 14, 2018 4:06 pm
Forum: General Chat
Topic: Evil puzzle
Replies: 19
Views: 1892

Re: Evil puzzle

FIDE loves absurd checkmates, and will go to their grave defending them. I think these checkmates should be abolished. I did state that the last move needs to be legal, however I did not say that about the preceding moves, and as such I will accept your solution. However, let me rephrase the puzzle:...
by Jesper Norgaard
Sat Apr 14, 2018 2:18 pm
Forum: General Chat
Topic: Evil puzzle
Replies: 19
Views: 1892

Re: Evil puzzle

The latter. There is a genuine solution (e.g. 2 moves from White and Black) and then there is 20 different checkmate moves possible as the 3rd move of the game. I am validating with the FIDE Laws of Chess, which should be a hint. Perhaps the hustlers in New York Central Park would not accept it, but...
by Jesper Norgaard
Sat Apr 14, 2018 10:08 am
Forum: General Chat
Topic: Evil puzzle
Replies: 19
Views: 1892

Evil puzzle

Admirers of retrograde analysis may like this puzzle: From the initial position (not Fischerandom) White moves, Black moves, White moves, Black moves, and now White can checkmate Black with 20 different legal moves. 6 legal moves will not checkmate from that position. Can you find the moves? Just a ...
by Jesper Norgaard
Fri Oct 13, 2017 11:26 pm
Forum: General Chat
Topic: FIDE Laws of Chess
Replies: 20
Views: 1788

Re: FIDE Laws of Chess

The proposal is that from 1st January 2018, two illegal moves lose in all three speed formats of chess, not one. That would seem to be sensible, but it doesn't appear to be what is suggested in the document I have just downloaded from the FIDE website: "Appendix 2, FIDE Laws of Chess, Amendments pr...
by Jesper Norgaard
Wed Jul 05, 2017 3:45 am
Forum: General Chat
Topic: 2017 Laws of Chess: FIDE Handbook discrepancy
Replies: 62
Views: 4252

Re: 2017 Laws of Chess: FIDE Handbook discrepancy

Should there be a Law preventing a player from holding a captured piece during the game? I believe that would be trying to solve the problem in the wrong end. Punishing actions with captured pieces will not guarantee that any new promotions become more consistent, which should clearly be our primar...
by Jesper Norgaard
Sun Sep 04, 2016 12:32 am
Forum: General Chat
Topic: What is the result of the game?
Replies: 22
Views: 2035

Re: What is the result of the game?

Although forced, surely this can only be classed as a 'theoretical' draw given the scenario; Where white has just played Bxd2 (presumably then stopping his clock) and Black's flag (then) falls, then... 1. White may claim the win due to Black's flag fall, regardless of the position on the board (unl...
by Jesper Norgaard
Fri Sep 02, 2016 11:19 pm
Forum: General Chat
Topic: What is the result of the game?
Replies: 22
Views: 2035

Re: What is the result of the game?

As it happens within the last few weeks I played in a rapidplay and was a piece + pawns up but with only 6 seconds left. I considered offering a draw but didn't as my opponent had several minutes left and I needed at least 12 moves to complete the game. I felt it would be insulting to offer a draw ...
by Jesper Norgaard
Mon Aug 22, 2016 12:14 pm
Forum: General Chat
Topic: Draft of FIDE Laws of Chess
Replies: 28
Views: 1798

Re: Draft of FIDE Laws of Chess

I do not like the new 6.7.1. "Any player who arrives at the chessboard after the start of the session shall lose the game. Thus the default time is zero minutes. The rules of a competition may specify otherwise." That's back to what it said in the 2009 Laws, which, I believe, many arbiters did not ...