Search found 809 matches
- Thu Jan 14, 2021 6:04 am
- Forum: Computer Chess Club: General Topics
- Topic: Interesting mate in 8
- Replies: 8
- Views: 364
Re: Interesting mate in 8
Myrddin took 90 seconds to give a Mate in 9 with Kg2. But, no surprise, the great old mate-finder The King from CM9000 finds Re3 and announces Mate in 8 in eight seconds. Time Depth Score Positions Moves 0:00 1/3 4.17 2247 1.Qh3 Kf8 2.Qh8+ Ke7 3.Qxg7+ Kd6 4.Qxb7 Bxb7 0:00 1/4 4.57 7786 1.Qh3 Kf8 2.Q...
- Sat Jan 02, 2021 7:48 pm
- Forum: Computer Chess Club: Programming and Technical Discussions
- Topic: Blunder option
- Replies: 37
- Views: 2086
Re: Blunder option
Johan did the MultiPV method in The King (Chessmaster). There was a "randomness" setting for each personality, from 0-100. A randomness of 20, for example, gave +/- 10cp for each move. So strong (i.e. GM-level) personalities that had that level of randomness would often play moves that could be call...
- Thu Sep 24, 2020 11:40 pm
- Forum: Computer Chess Club: Programming and Technical Discussions
- Topic: Test position for weak (~2500) engines
- Replies: 5
- Views: 2325
Re: Test position for weak (~2500) engines
Myrddin on 8 cores finds Rxd4 in 8 seconds, but then keeps waffling between Rxd4 and Rxe3. The score is never close to a draw, though, even after two minutes.
- Mon Sep 21, 2020 11:15 pm
- Forum: Computer Chess Club: Programming and Technical Discussions
- Topic: 3 fold repetition scoring issue
- Replies: 10
- Views: 2001
Re: 3 fold repetition scoring issue
This is probably the easiest position I have. Your engine should avoid Qxa6 and Rxa6 as they both lead to an immediate 3-fold draw: [D]3r3N/R1p1kppp/n6n/8/2QPP3/5q2/5P1P/5RK1 w - - 0 24 Also, this is a classic position, but it is much harder for young engines to find: [D]1k6/4R3/1p6/p1p3p1/qnBn2Qp/5...
- Sun Aug 16, 2020 12:51 am
- Forum: Computer Chess Club: Programming and Technical Discussions
- Topic: Laziest Lazy SMP
- Replies: 12
- Views: 5316
Re: Laziest Lazy SMP
Yep, that's how I did it in my code sample above.Dann Corbit wrote: ↑Sun Aug 16, 2020 12:39 amUse CreateProcess.silentshark wrote: ↑Sat Aug 15, 2020 5:13 pmSo, here's my lazy question, what's the easiest way to create multiple processes and share memory between them, in the world of Windows?
You can almost simulate a fork with it.
- Sat Aug 15, 2020 5:28 pm
- Forum: Computer Chess Club: Programming and Technical Discussions
- Topic: Laziest Lazy SMP
- Replies: 12
- Views: 5316
Re: Laziest Lazy SMP
With the nasty legacy code I have (lots of global variables etc.), the multiple process approach might be the easiest thing for me to use. So, here's my lazy question, what's the easiest way to create multiple processes and share memory between them, in the world of Windows? And that's exactly the ...
- Sat Aug 15, 2020 5:02 pm
- Forum: Computer Chess Club: Programming and Technical Discussions
- Topic: Laziest Lazy SMP
- Replies: 12
- Views: 5316
Re: Laziest Lazy SMP
Results against TSCP: 1 thread on i7-6700 3.40GHz (4 cores) -----------------Plankton64_03----------------- Plankton64_03 - TSCP181c : 84.0/100 75-7-18 (=11=111=101=11=1110=1011111111==0=11111110=11=11=1111=1111=1111111111110111110111==1111=1=1111111111) 84% +288 -----------------TSCP181c----------...
- Wed Aug 12, 2020 9:33 pm
- Forum: Computer Chess Club: Programming and Technical Discussions
- Topic: Test Position for amateurs, humans, and even some stronger engines
- Replies: 8
- Views: 2554
Re: Test Position for amateurs, humans, and even some stronger engines
8/3r4/5p2/2k1nQ2/8/3p4/3K4/8 b - - This position came up in Halogen v Myrddin in a CCRL match. There is only one move that wins for Black. Myrddin failed to find it within the time control even with 5-man tablebases. :-( Stockfish-dev with pure NNUE eval (no hybridization) finds the correct move in...
- Wed Aug 12, 2020 4:59 pm
- Forum: Computer Chess Club: Programming and Technical Discussions
- Topic: Test Position for amateurs, humans, and even some stronger engines
- Replies: 8
- Views: 2554
Test Position for amateurs, humans, and even some stronger engines
This position came up in Halogen v Myrddin in a CCRL match. There is only one move that wins for Black. Myrddin failed to find it within the time control even with 5-man tablebases.

- Sat Aug 08, 2020 5:50 pm
- Forum: Computer Chess Club: General Topics
- Topic: Test Position
- Replies: 14
- Views: 2226
Re: Test Position
Even The King from CM9000 (of course, with only one thread) can find it in less than a minute: Time Depth Score Positions Moves 0:00 1/3 -3.52 1297 1.Kb1 Kg8 2.c3 0:00 1/3 -3.49 1523 1.a3 Nc6 2.Qxb5 Bxf2 0:00 1/3 -3.45 2262 1.c3 Qc6 2.Kb1 0:00 1/4 -3.26 4564 1.c3 Nxa2+ 2.Kb1 h6 3.Kxa2 hxg5 4.hxg5+ K...