Search found 133 matches

by Dan Astrachan
Mon Jan 09, 2012 1:07 pm
Forum: Computer Chess Club: General Topics
Topic: test position from playchess.com
Replies: 4
Views: 988

Re: test position from playchess.com

FEN: r2n1r2/1pp1k1p1/p4qn1/3Bp2p/2NpPP2/P7/1P4PP/2RQ1RK1 w - - 0 1 Ivanhoe 46f x64 Analysis : 24 04:33 2 908 545 736 10 666 000 +0,91 g2-g3 e5xf4 e4-e5 Qf6-f5 Nc4-a5 c7-c6 Na5xb7 Qf5-d7 Nb7xd8 Ra8xd8 Bd5xc6 Qd7-e6 Bc6-a4 Ng6xe5 Rc1-c7+ Ke7-f6 g3xf4 Ne5-f7 Qd1xh5 Qe6-e3+ Kg1-g2 Qe3-e4+ Rf1-f3 Qe4-e2+...
by Dan Astrachan
Tue Dec 13, 2011 6:12 pm
Forum: Computer Chess Club: General Topics
Topic: Alekhine - Capablanca 1927 once more
Replies: 32
Views: 7665

Re: Alekhine - Capablanca 1927 once more

For what it's worth, I pitted two fairly strong engines (Critter 1.2 SSE 4 and Ivanhoe 46f) against each other. My machine is reasonably fast (Quadcore, i875, 12 Gb of RAM). I gave both engines two hours + 60 seconds per move played, and let them play out until either a mate or draw was reached. In ...
by Dan Astrachan
Mon Dec 12, 2011 12:54 pm
Forum: Computer Chess Club: General Topics
Topic: An old test position : Vescovi - Gschwendtner 1994
Replies: 20
Views: 3623

Re: An old test position : Vescovi - Gschwendtner 1994

Ivanhoe 46f x64 Mouv. nº1: Rxg7+ | | Evaluation: 6.61 | | Ligne proposée: 1. Rxg7+ Kxg7 2. h6+ Kf8 3. Qf6 Bd7 4. exd5 Bc6 5. Rg1 Ke8 6. dxc6 Qf8 7. c7 Rbc8 8. cxd8=Q+ Rxd8 9. Nd4 Rd5 10. Nxe6 Rd6 11. Ng7+ Kd7 12. Qf5+ Kc7 13. Qc5+ Kb7 14. Qxb5+ Rb6 15. Qd7+ Ka6 Depth: 24 | Processing time: 1110.322 ...
by Dan Astrachan
Sun Dec 04, 2011 10:10 am
Forum: Computer Chess Club: General Topics
Topic: test position
Replies: 13
Views: 3162

Re: test position

This is actually a mate in 16, and a fun one at that. :) Here is the solution courtesy of Ivanhoe 46f x64: Anonymous1 - Anonymous2 1. Bd5 Rb3+ 2. Kc1 Rc3+ 3. Kd1 Rd3+ 4. Ke1 Re3+ 5. Kf1 Rf3+ 6. Kg1 Rxg3+ 7. Kf1 Rf3+ 8. Ke1 Re3+ 9. Kd1 Rd3+ 10. Kc1 Rc3+ 11. Kb1 Rb3+ 12. axb3 Ra1+ 13. Kxa1 dxc5 14. dx...
by Dan Astrachan
Tue Nov 29, 2011 12:23 pm
Forum: Computer Chess Club: General Topics
Topic: About a Mate in 13...
Replies: 11
Views: 3422

Re: About a Mate in 13...

Mate in 16 for Ivanhoe: FEN: 8/7q/2K2p2/4p3/2k1P2p/8/3P4/7Q w - - 0 1 Ivanhoe 46f x64 Analysis: 24+ 00:28 256 014 886 9 314 000 +175,35 Qh1-b1 Kc4-d4 Qb1-b3 Qh7xe4+ Kc6-d6 Qe4-g2 Qb3-c3+ Kd4-e4 Qc3-c6+ Ke4-d3 Qc6xg2 e5-e4 Kd6-d5 e4-e3 d2xe3 f6-f5 Qg2-f2 Kd3-c3 Qf2xh4 Kc3-c2 Kd5-e5 Kc2-d2 Qh4-d4+ Kd2...
by Dan Astrachan
Mon Nov 28, 2011 3:24 pm
Forum: Computer Chess Club: General Topics
Topic: Mate in 12
Replies: 13
Views: 2284

Re: Mate in 12

ok that was fairly easy, now lets back up a couple of moves. mate in 13 [D] 2K1k1br/3p1n1r/2p2pN1/P2p1N2/2P3pP/5B2/P2P4/8 b - - FEN: 2K1k1br/3p1n1r/2p2pN1/P2p1N2/2P3pP/5B2/P2P4/8 b - - 0 1 Ivanhoe 46f x64 Analysis: 23- 03:51 1 891 646 812 8 202 000 -M59 g4xf3 a5-a6 f3-f2 a6-a7 f2-f1Q a7-a8N Qf1-f4 ...
by Dan Astrachan
Mon Nov 28, 2011 9:40 am
Forum: Computer Chess Club: General Topics
Topic: Mate in 12
Replies: 13
Views: 2284

Re: Mate in 12

ChestUCI finds it instantly on my machine: ChestUCI: FEN: 2K1k1br/3p1n1r/P1p2pN1/3p1N2/2P4P/8/P2P1p2/8 w - - (8+10) Position-Analysis: C0/R0/K1/P6/X17 W:8/23 AutoTurbo-Search for Special-Mate [C1/R0/K0/P0/X0] in 12 ... (Hash=2044MB) AutoTurbo-Search for Special-Mate [C0/R1/K0/P0/X0] ...
by Dan Astrachan
Thu Dec 16, 2010 10:19 pm
Forum: Computer Chess Club: General Topics
Topic: Mate in 20... by William A. Shinkman
Replies: 7
Views: 958

Re: Mate in 20... by William A. Shinkman

Houdini 1.5 finds it instantly on my quad-core machine: 4/14 00:00 1 853 1 853 000 0,00 Dg4b4+ Ra3a2 Db4c4+ Ra2a3 Dc4b4+ Ra3a2 5/14 00:00 1 977 1 977 000 0,00 Dg4b4+ Ra3a2 Db4c4+ Ra2a3 Dc4b4+ Ra3a2 6/14 00:00 2 103 233 000 0,00 Dg4b4+ Ra3a2 Db4c4+ Ra2a3 Dc4b4+ Ra3a2 7/14 00:00 2 426 24 000 0,00 Dg4b...
by Dan Astrachan
Wed Dec 15, 2010 11:01 pm
Forum: Computer Chess Club: General Topics
Topic: Mate in 8, how hard can it be?
Replies: 19
Views: 2410

Re: Mate in 8, how hard can it be?

52 seconds on my machine with Houdini 1.5 Houdini_15_x64: 4/18 00:00 2 750 916 000 +5,62 Tb3f3 b4b3 Cc1xb3+ Db6xb3 Tf3xb3 Ta4b4 5/18 00:00 3 232 1 077 000 +4,57 Tb3f3 b4b3 Cc1xb3+ Db6xb3 Tf3xb3 Ta4b4 Tb3a3 Tb4xb2 6/18 00:00 3 604 300 000 +4,57 Tb3f3 b4b3 Cc1xb3+ Db6xb3 Tf3xb3 Ta4b4 Tb3a3 Tb4xb2 7/18...
by Dan Astrachan
Mon Nov 15, 2010 11:43 am
Forum: Computer Chess Club: General Topics
Topic: Test Position: Qh8+!!
Replies: 39
Views: 9140

Re: Test Position: Qh8+!!

On my super-crappy PC at work (P4, 2gb of RAM, Windows XP 32 bits, 1 CPU) the award goes to Fire 1.31 , which finds the mate in 9 in barely 42 seconds: Fire_131_w32_KLO: 16+ 00:34 13.122.437 388.000 +1,00 Dh2h8+ 16+ 00:42 16.824.288 402.000 +233,37 Dh2h8+ 16 00:42 16.988.861 403.000 +M9 Dh2h8+ Fg7xh...