Search found 9 matches

by guyhaw
Tue Oct 30, 2018 9:01 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Chess Programming Wiki
Replies: 34
Views: 17955

Re: Chess Programming Wiki

Great job by the CPW team in resurrecting this ultra-valuable source of information.

Congratulations and thanks to all.

Guy
by guyhaw
Thu Mar 29, 2018 10:51 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: 7-men Syzygy attempt
Replies: 579
Views: 93567

Re: 7-men Syzygy attempt: 6v1 EGTs

Presumably, the side with 6 men will try to force=sac a man as quickly as possible to get to a 5v1 win :-)

g
by guyhaw
Thu Mar 29, 2018 10:42 am
Forum: Computer Chess Club: General Topics
Topic: Increasing returns of tablebases with TC
Replies: 9
Views: 2163

Re: Increasing returns of tablebases with TC

Excellent experiment: bigger time-budget ==> EGT-access earlier in the search and greater nodes/sec.

In TCEC11.P, game 66.2, move 64w, Stockfish consulted the EGT 1,274,028,324 times @ nearly 4m EGT access/sec.

Has anyone seen bigger numbers than these!

g
by guyhaw
Tue Mar 27, 2018 4:32 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: 7-men Syzygy attempt
Replies: 579
Views: 93567

Re: 7-men Syzygy attempt

Very impressed by your initiative - and good to see Ronald de Man active on the EGT scene again. I would be very happy to have a version of RdM's code which created 6-man DTZ EGTs , regardless of a n-man rule. Setting 'n' to 500 ply would I think do it! While there is some 6-man DTZ data for pawnles...
by guyhaw
Wed Jul 05, 2017 5:12 pm
Forum: Computer Chess Club: General Topics
Topic: Cursed win at TCEC
Replies: 296
Views: 227674

Re: 545 moves

Yes - there are deeper mates.

g
by guyhaw
Sat Nov 05, 2016 7:19 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Suicide chess tablebases (stalemated player wins)
Replies: 38
Views: 6191

Re: Suicide chess tablebases (stalemated player wins)

Niklas, Good to see plaudits for https://syzygy-tables.info/ ... with which I heartily agree. Maybe you know of the announcement that Losing Chess is solved - in the sense that the initial position is known to be a win for White ... 1. e3. http://magma.maths.usyd.edu.au/~watkins/LOSING_CHESS/LCsolve...
by guyhaw
Mon Mar 07, 2016 11:24 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: New 6-piece tablebases
Replies: 194
Views: 102050

Re: New 6-piece tablebases: missing statistics

I got lucky and found a KQPKBP/0-1 frustrated win in 1, one of the five: bP wK Position dtm, dtz50' a2 h7 Q7/6K1/P7/8/1b6/8/p7/3k4 b 113p, 1p 1. a1=Q+''''' Kf7' Qa2+''''' 3. Kg7'''' Qb2+''''' 4. Kg6'' Qc2+'' 5. Kf6'' Qc3+' 6. Kg6'' Qg3+'' a2 h8 Q6K/8/P7/8/1b6/8/p7/3k4 b 113p, 1p 1. ... a1=Q+...
by guyhaw
Wed Mar 02, 2016 9:07 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: New 6-piece tablebases
Replies: 194
Views: 102050

Re: New 6-piece tablebases: missing statistics

For KQPKBP/0-1, there are only five 'frustrated wins' for Black, all requiring an immediate pawn conversion. The other three endgames with 0-1 frustrated wins for Black in 1 ply are: KQNPKQ/0-1: 4K1k1/1N1P4/8/3q4/8/1Q6/8/8 b, 1... Qxb3 (KNPKQ) KQRPKP/0-1: 8/1K6/8/2P5/2R5/7k/p7/1Q6 b, 1... axb1=Q+ (K...
by guyhaw
Wed Mar 02, 2016 3:13 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: New 6-piece tablebases
Replies: 194
Views: 102050

Re: New 6-piece tablebases: missing statistics

The stats files for the syzygy EGTs, at least the ones I came by, do not include exemplar 'longest frustrated wins' for the four cases where the 'longest frustrated win' for Black is just 1 (i.e., '101') ply. There are examples of 'longest frustrated wins' for White in 1 ply, and for Black in more t...