Search found 817 matches

by JVMerlino
Sat Feb 20, 2021 8:26 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Publishing engine to CCRL
Replies: 2
Views: 224

Re: Publishing engine to CCRL

Hi Neil,

CCRL doesn't have any sort of publish or "signup" system. Just post a message here about your new engine and include a download link, and CCRL will do the rest!
by JVMerlino
Wed Feb 17, 2021 8:12 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: The Return Of Icarus
Replies: 8
Views: 737

Re: The Return Of Icarus

So close! But Waxman is definitely the stronger engine, so I'm happy with 2nd place in this group!

Thanks, Graham!
by JVMerlino
Wed Feb 17, 2021 8:10 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Can your engine find this move ?
Replies: 4
Views: 531

Re: Can your engine find this move ?

Myrddin (8 cores) finds it in 3.7 seconds: 1 -160 0 55 e4d5 c7d5 1 -116 0 125 h7h6 d5e4 2 -116 1 218 h7h6 d5e4 a3b4 (14 KNPS) 3 -100 1 2803 h7h6! (186 KNPS) 3 -132 1 3531 h7h6? f8h8 e4d5 (235 KNPS) 3 -112 1 6121 g2g1 d5d4 h7g7 (408 KNPS) 4 -117 1 33652 g2g1 d5d4 h7h6 (2243 KNPS) 5 -116 1 79372 g2g1 ...
by JVMerlino
Wed Feb 17, 2021 8:07 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish solves a 5 mover
Replies: 7
Views: 731

Re: Stockfish solves a 5 mover

Weird. Maybe weaker engines have an easier time due to less aggressive pruning? Myrddin solves this in 21 seconds... 20 0 103 12425605 e6d5 b8c8 d5a8 c7e7 a8b7 e7b7 a6b7 c8b7 e5g7 b5b4 g7h6 (12051 KNPS) 21 0 243 35686436 e6d5 b8c8 d5a8 c7e7 (14643 KNPS) 22 0 478 71229298 e6d5 b8c8 d5a8 c7e7 a8b7 e7b...
by JVMerlino
Mon Feb 15, 2021 7:45 pm
Forum: Computer Chess Club: General Topics
Topic: A Little Surprise from The King
Replies: 6
Views: 589

Re: A little surprise from The King.

Chest found some checkmates in 9 from the point that my SF run deviated from your original post. I would say that the position from your post is likely a checkmate in 13. Yes, I think you are correct. I let The King run for nearly 10 minutes, and it eventually got to Mate in 13, but wasn't able to ...
by JVMerlino
Mon Feb 15, 2021 6:39 pm
Forum: Computer Chess Club: General Topics
Topic: A Little Surprise from The King
Replies: 6
Views: 589

Re: A Little Surprise from The King

Where have you been John? Four posts since last September. Don't forget Myrddin :) It's six years now since the last version! Hi Guenther! Well, computer chess has almost entirely grown out of my ability to meaningfully contribute to any discussion about current topics. So there's really very rarel...
by JVMerlino
Mon Feb 15, 2021 5:50 pm
Forum: Computer Chess Club: General Topics
Topic: A Little Surprise from The King
Replies: 6
Views: 589

A Little Surprise from The King

So I was enjoying one of agadmator's excellent chess videos - Rodzynski v Alekhine, 1913. https://www.youtube.com/watch?v=zJU1whqM8yM Here's the game: 1. e4 e5 2. Nf3 d6 3. Bc4 Nc6 4. c3 Bg4 5. Qb3 Qd7 6. Ng5 Nh6 7. Bxf7 Nxf7 8. Nxf7 Qxf7 9. Qxb7 Kd7 10. Qxa8 Qc4 11. f3 Bxf3 12. gxf3 Nd4 13. d3 Qxd3...
by JVMerlino
Fri Feb 12, 2021 6:08 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Thought bitboards was faster :-)
Replies: 38
Views: 2819

Re: Thought bitboards was faster :-)

I don't have much help to offer, other than to say that the perft speed for Myrddin more than doubled when I converted from 0x88 to bitboards. Myrddin v0.85 perft 6 = 119060324 in time 6422 Myrddin v.086 perft 6 = 119060324 in time 2672 To be fair, this is using bulk counting, but it's the ratio tha...
by JVMerlino
Thu Jan 14, 2021 6:04 am
Forum: Computer Chess Club: General Topics
Topic: Interesting mate in 8
Replies: 8
Views: 1355

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...
by JVMerlino
Sat Jan 02, 2021 7:48 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Blunder option
Replies: 37
Views: 4531

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...