Search found 270 matches

by Arpad Rusz
Thu May 24, 2018 11:42 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: 7-men Syzygy attempt
Replies: 588
Views: 138278

Re: 7-men Syzygy attempt

Having the full set of 7-man Syzygy tablebases would be cool. In practice, some tablebases are very important for endgame analysis and some are likely just wasting storage place. I have created a heat map for the 4v3 tablebases. The bases with material differences of 1 or 3 are the most important an...
by Arpad Rusz
Thu Oct 19, 2017 11:03 am
Forum: Computer Chess Club: General Topics
Topic: Elements of the ULTIMATE Chess GUI?
Replies: 197
Views: 29386

Re: Elements of the ULTIMATE Chess GUI?

I would suggest to build on ChessX, an attractive GUI which already has lots of features.
http://chessx.sourceforge.net/
by Arpad Rusz
Thu Oct 19, 2017 12:08 am
Forum: Computer Chess Club: General Topics
Topic: KNPPKBP longest win
Replies: 23
Views: 4040

Re: KNPPKBP longest win

23...Rc7 or 23...Rc4 are also losing but the win would take more than 50 moves since the last capture from the third move. Studies don't take into account the 50 moves rule so these moves are not cooks. 23...Kc2 is slightly suboptimal but keeps the following moves from the solution unique.
by Arpad Rusz
Wed Oct 18, 2017 10:48 pm
Forum: Computer Chess Club: General Topics
Topic: KNPPKBP longest win
Replies: 23
Views: 4040

Re: KNPPKBP longest win

The study based on the longest cursed win from the KRRvKRP syzygy tablebase has been published in the Russian magazine Shakhmatnaya Kompozitsia.

[D]5B2/8/1K6/8/8/ppR5/k7/rbR5 w - - 0 1
White wins

Here is the full analysis:
http://ruszchessstudies.blogspot.hu/201 ... y-129.html
by Arpad Rusz
Sat Oct 14, 2017 4:14 pm
Forum: Computer Chess Club: General Topics
Topic: TCEC 10
Replies: 229
Views: 65847

Re: TCEC 10

Stockfish - Chiron

[D]6rr/3b1k2/1p1p4/qPpPp1n1/P1P1PpP1/3Q1P1p/N2N3R/3B1K2 b - - 1 59

The f3 pawn is defended three times but Stockfish still played 59...Nxf3! -+
by Arpad Rusz
Fri Sep 29, 2017 8:52 am
Forum: Computer Chess Club: General Topics
Topic: non comprehensible moves for humans
Replies: 9
Views: 1775

Re: non comprehensible moves for humans

Maybe instead of Syzygy50MoveRule engine should have another UCI option telling above which piece count should the 50 move rule kick in. The default should be 2, the correspondence players would choose 7 and someone who tries to analyse an endgame study would choose 32 (disabling the rule completely).
by Arpad Rusz
Wed Sep 27, 2017 8:48 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: The Peace-Chess Challenge
Replies: 45
Views: 7185

Re: The Peace-Chess Challenge

Thanks for the engine, it was a great fun to play with it! Probably there is no need even to change the rules. :D
There is a bug: the engine got into a perpetual cycle when tried to play a move. Its rook and queen were exchanging places forever (both of them hugging some other pieces).
by Arpad Rusz
Wed Sep 27, 2017 1:38 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: The Peace-Chess Challenge
Replies: 45
Views: 7185

Re: The Peace-Chess Challenge

Rule proposal:
If a piece finds a matching piece of the same kind their union have to be removed from the board. So Qq, Rr, Bb, Nn and Pp pairs never survive on the board. This also removes most of the annoying repetitions.
by Arpad Rusz
Wed Sep 27, 2017 7:55 am
Forum: Computer Chess Club: General Topics
Topic: The trojan horse puzzle
Replies: 24
Views: 5967

Re: The trojan horse puzzle

The author of this puzzle seems to be GM Surya Sekhar Ganguly,‏ I just proposed a correction.
by Arpad Rusz
Tue Sep 26, 2017 8:49 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: The Peace-Chess Challenge
Replies: 45
Views: 7185

Re: The Peace-Chess Challenge

We also discussed the issue of the poor King being so defenseless. One of the solutions he coined was to allow a King to embrace pieces, immobilizing the latter (so they cannot abduct the King to a place where it cannot survive). After the king embraces it becomes immune to all attacks because one ...