Search found 2289 matches

by MikeB
Mon Aug 20, 2018 11:15 pm
Forum: Computer Chess Club: General Topics
Topic: BIG NEWS! The 7 man syzygy tablebase files are complete.
Replies: 13
Views: 927

Re: BIG NEWS! The 7 man syzygy tablebase files are complete.

See: http://talkchess.com/forum3/viewtopic.php?f=7&t=66797&start=472 An incredible effort, with massive thanks to Ronald de Man for the tablebase code and to Bojun Guo for performing the calculations on his titanic machine for five straight months. I believe this position is the longest cursed win ...
by MikeB
Mon Aug 20, 2018 12:40 am
Forum: Computer Chess Club: General Topics
Topic: In Praise of The King
Replies: 19
Views: 917

Re: In Praise of The King

The King still surprises me sometimes. This is v3.12, from Chessmaster 9000 in 2002, on old hardware, getting around 585KNPS, and finding a mate in 15 in four seconds. I tried several other engines, and only Crafty 25 (JA build) came close at 7 seconds (at 1 core, like The King), even though it nee...
by MikeB
Thu Aug 16, 2018 2:14 am
Forum: Computer Chess Club: General Topics
Topic: apple chess for imac g4
Replies: 15
Views: 461

Re: apple chess for imac g4

hi, i bought a used apple imac g4 for almost nothng and would like to do a little chess on it too. i have seen there is an integrated chess program , but this does not fit my needs. can some apple user help me getting a gui and uci engines for apple installed on the old imac g4 ? i never really use...
by MikeB
Wed Aug 15, 2018 3:51 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: 7-men Syzygy attempt
Replies: 505
Views: 57576

Re: 7-men Syzygy attempt

Congrats for finishing all tables with <= 1 pawns! Getting close to completion now. Based on the tablebase.lichess.ovh mirror: pawns generated/total - 396/396 P 330/330 PP 166/180 PPP 55/72 PPPP 14/20 PPPPP 2/3 eg generated/total 6v1 126/126 5v2 350/350 4v3 487/525 Small plug: I've been updating sy...
by MikeB
Fri Aug 10, 2018 4:23 am
Forum: Computer Chess Club: General Topics
Topic: 7-piece syzygy solve Behting Study within a second
Replies: 6
Views: 506

Re: 7-piece syzygy solve Behting Study within a second

With 7 man syzygy, one may also get endings like this - here black takes white to the 50th ply, but has to sacrifice the Q on the 50th move to avoid mate , and then mate shortly follows. Quite a King walk. White to move and mate in 59. Tablebase mate found instantly of course. 8/Q7/7r/4B3/7q/8/8/NK2...
by MikeB
Tue Aug 07, 2018 1:31 am
Forum: Computer Chess Club: General Topics
Topic: Updated TI test suite
Replies: 18
Views: 1721

Re: Updated TI test suite

Not important at all, just curiosity, I ran a very long search on this one and it seems it is Mate in 32, or perhaps a little less. With tablebases it is probably easier to show a less than 32 result. I'm glad I got a stable result. It took a long time to get Mate out of 49.9 value etc. though. The...
by MikeB
Tue Aug 07, 2018 1:30 am
Forum: Computer Chess Club: General Topics
Topic: Updated TI test suite
Replies: 18
Views: 1721

Re: Updated TI test suite

Updated TI test set. Removed: 1q6/5ppk/4b2p/3pP2N/1p1p1P1B/rPbP1Q1P/6PK/2R5 w - - bm Rf1; id "xTI.011"; 1rb1r1k1/1p3pb1/p5pp/P1pPn3/Nq3B2/R4P2/1P1QB1PP/4K2R b K - bm Bf5; id "xTI.013"; 6k1/5p2/5Pp1/p2p1pP1/1n3P2/2p1K3/P7/7R w - - bm Kd4; id "xTI.056"; r1b1kbnr/pppp1Npp/8/8/8/5n2/PPPPBP1P/RNBQKR2 w ...
by MikeB
Tue Aug 07, 2018 1:06 am
Forum: Computer Chess Club: General Topics
Topic: Updated TI test suite
Replies: 18
Views: 1721

Re: Updated TI test suite

Not important at all, just curiosity, I ran a very long search on this one and it seems it is Mate in 32, or perhaps a little less. With tablebases it is probably easier to show a less than 32 result. I'm glad I got a stable result. It took a long time to get Mate out of 49.9 value etc. though. The...
by MikeB
Tue Aug 07, 2018 12:47 am
Forum: Computer Chess Club: General Topics
Topic: A mate suite to test multi-pv and new engines
Replies: 2
Views: 207

Re: A mate suite to test multi-pv and new engines

Analyzed the positions by the mate solver chest They include all the positions of all the pieces against the following pieces in their initial position 1)king(1 position) 2)king and a pawn(8 positions) 3)king and 2 pawns(28 positions) 4)king and 3 pawns(56 positions) 5)king and a knight or bishop(4...
by MikeB
Sat Aug 04, 2018 4:08 pm
Forum: Computer Chess Club: General Topics
Topic: 7 men endgame statistics
Replies: 17
Views: 1466

Re: 7 men endgame statistics

In my case , I had two empty sata connectors, did not want to go to the external HD route and found that 8GB drives were much more cost effective than the 12 TB or 10 TB drives. I believe OP was thinking like me and will handpick the TB's he will have so that they will fit in some configuration tha...