Search found 270 matches

Tue Sep 26, 2017 8:18 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: The Peace-Chess Challenge
Replies: 45
Views: 8494

Re: The Peace-Chess Challenge

"Repeated moves: When the same move has been played by both players three times in a row with the same piece in the same position on the board, the players will automatically draw." But there is nothing in the rules to avoid a cycle during a single move. There could be four solutions: During a move ...
Mon Sep 25, 2017 11:54 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: The Peace-Chess Challenge
Replies: 45
Views: 8494

Re: The Peace-Chess Challenge

I like this game but I would prefer that the kings could capture. Otherwise positions with less than 32 man are illegal which is bad for composing problems or studies. Also the checkmate positions would be more natural if the king could take an undefended attacker.
Sun Sep 24, 2017 12:50 pm
Forum: Computer Chess Club: General Topics
Topic: Static evaluation of the immobile pieces
Replies: 9
Views: 1345

Re: Static evaluation of the immobile pieces

Yes, it is a clear win for white! The author's solution was this: [pgn][Event "Tidskrift for Schack#218 (v)"] [Site "?"] [Date "1930.??.??"] [Round "?"] [White "Clausen=S"] [Black "(+0433.24f1b6)"] [Result "1-0"] [SetUp "1"] [FEN "8/8/1k6/8/6p1/6p1/P2R1pPp/n4Kbr w - - 0 1"] [PlyCount "77"] [EventDat...
Sat Sep 23, 2017 1:32 pm
Forum: Computer Chess Club: General Topics
Topic: Static evaluation of the immobile pieces
Replies: 9
Views: 1345

Re: Static evaluation of the immobile pieces

Engines usually give a big bonus for the passed pawns. So the pawns are rewarded for being able to reach the promotion square (their main target) on a "frozen board". Probably the static evaluation can be made more dynamic also for other pieces. They should receive rewards (or penalties) for their a...
Sat Sep 23, 2017 1:02 pm
Forum: Computer Chess Club: General Topics
Topic: Static evaluation of the immobile pieces
Replies: 9
Views: 1345

Static evaluation of the immobile pieces

The static evaluation should severely penalize the black rook and bishop in the following position (Clausen, 1930). Even the knight must get a big penalty. On the other hand the white king has much less attacking value than the black one. Effectively only the R+P vs K+N is fighting and white has the...
Fri Sep 22, 2017 4:43 pm
Forum: Computer Chess Club: General Topics
Topic: What does semi-fortress mean?
Replies: 1
Views: 582

Re: What does semi-fortress mean?

I guess the semi-fortress is not a true fortress but a fortress-like position which can be eventually broken (a "pseudo-fortress"). Sometimes, when the fortress collapses, the weaker side tries to rebuild another one elsewhere. In the BB/N ending if a fortress with Nb2 is broken, the weaker side can...
Sun Sep 17, 2017 8:00 pm
Forum: Computer Chess Club: General Topics
Topic: KNPPKBP longest win
Replies: 23
Views: 4591

Re: KNPPKBP longest win

[pgn] [Event "EG#188"] [Site "?"] [Date "2012.??.??"] [Round "?"] [White "Bourzutschky & Konoval"] [Black "?"] [Result "1-0"] [SetUp "1"] [FEN "8/2p5/8/8/6b1/1PP5/K7/1N5k w - - 0 0"] [PlyCount "203"] {"For the KNPPKBP endgame the longest win is 102 moves and there is only one record position."} 1. ...
Fri Sep 15, 2017 11:42 pm
Forum: Computer Chess Club: General Topics
Topic: The trojan horse puzzle
Replies: 24
Views: 6762

Re: The trojan horse puzzle

It seems that both 1.Kd2 and 1.Kb1 are equally good keys so I have corrected the study by modifying the position a bit:

http://ruszchessstudies.blogspot.hu/201 ... ess-3.html
Fri Sep 15, 2017 12:55 am
Forum: Computer Chess Club: General Topics
Topic: The trojan horse puzzle
Replies: 24
Views: 6762

Re: The trojan horse puzzle

This is a new study but I don't know who is its author. I have just seen on Facebook.
Thu Sep 14, 2017 11:10 pm
Forum: Computer Chess Club: General Topics
Topic: The trojan horse puzzle
Replies: 24
Views: 6762

The trojan horse puzzle

[D]3k4/8/7p/2p1p1pP/1pPpPpP1/1P1P1P2/N7/2K5 w - - 0 1

Break the fortress!