Author: Pete Galati
Date: 16:35:19 02/14/01
Go up one level in this thread
On February 14, 2001 at 16:29:28, Uri Blass wrote: >On February 14, 2001 at 13:55:54, Jeremiah Penery wrote: > >>On February 14, 2001 at 06:38:34, leonid wrote: >> >>>Hi! >>> >>>If you like to solve forced mate then you can try this: >>> >>>[D]2kr3r/qq2q1qp/nnb1nbn1/1B2QnN1/3N1Q2/1NQ1B1B1/1P4Q1/R1R3K1 w - - >>> >>>Please, indicate your result. >> >>Modified Crafty with Singular Extensions finds: >> >>9 15:20 Mat09 1. Qcxc6+ Nec7 2. Qxb7+ Qxb7 3. Qxb7+ >> Kxb7 4. Rxc7+ Nxc7 5. Qxc7+ Qxc7 6. >> Nc5+ Qxc5 7. Ba6+ Ka7 8. Bc8+ Na4 9. >> Qb8# <HT> >> >>Maybe the number of moves will go down later, but I'm not going to let it search >>any longer. :) > >Is it the first mate that your modified Crafty discovers >If it is then Junior is faster: > >Junior5.9 on p200 has the follwong evaluation > >9 0:52 MATE10 1.Qcxc6+ Nec7 2.Qxb7+ Qxb7 3.Qxb7+ Kxb7 4.Bxa6+ Ka8 5.Bf1+ Kb8 >6.Nc6+ Kb7 7.Ra7+ Kc8 8.Qxc7+ Qxc7 9.Qxf5+ Qgd7 10.Rxc7# > >Unfortunately Junior stops to search when it finishes iteration when it finds a >mate for itself. > >I guess that chessmaster is faster in finding a mate but I did not check it. > >Uri I fed this epd into Crafty way earlier today, but I've been too busy to post this. Crafty worked on this for a long time, I doubt that it would find one less than 8 moves. 5 piece tablebase files found 1836kb of RAM used for TB indices and decompression tables EGTB cache memory = 3M bytes. hash table memory = 48M bytes. pawn hash table memory = 5M bytes. Crafty v18.3 White(1): 2kr3r/qq2q1qp/nnb1nbn1/1B2QnN1/3N1Q2/1NQ1B1B1/1P4Q1/R1R3K1 w - - +---+---+---+---+---+---+---+---+ 8 | | | *K| *R| | | | *R| +---+---+---+---+---+---+---+---+ 7 | *Q| *Q| | | *Q| | *Q| *P| +---+---+---+---+---+---+---+---+ 6 | *N| *N| *B| | *N| *B| *N| | +---+---+---+---+---+---+---+---+ 5 | | B | | | Q | *N| N | | +---+---+---+---+---+---+---+---+ 4 | | | | N | | Q | | | +---+---+---+---+---+---+---+---+ 3 | | N | Q | | B | | B | | +---+---+---+---+---+---+---+---+ 2 | | P | | | | | Q | | +---+---+---+---+---+---+---+---+ 1 | R | | R | | | | K | | +---+---+---+---+---+---+---+---+ a b c d e f g h White(1): analzye Illegal move: analzye White(1): analyze clearing hash tables time surplus 0.00 time limit 30.00 (3:30) nss depth time score variation (1) 4 0.90 7.30 1. Qcxc6+ Nac7 2. Rxa7 Qxc6 3. Nxc6 Ngxf4 4. Nxe7+ Qxe7 4 1.17 7.37 1. Qgxc6+ Nec7 2. Qfxf5+ Kb8 3. Qxe7 Bxe7 4-> 1.29 7.37 1. Qgxc6+ Nec7 2. Qfxf5+ Kb8 3. Qxe7 Bxe7 5 1.40 ++ 1. Qgxc6+!! 5 2.92 13.08 1. Qcxc6+ Nec7 2. Qxb7+ Qxb7 3. Bxa6 Nd5 4. Qxc7+ Qxc7 5. Bxb7+ Kxb7 6. Rxc7+ 5-> 3.19 13.08 1. Qcxc6+ Nec7 2. Qxb7+ Qxb7 3. Bxa6 Nd5 4. Qxc7+ Qxc7 5. Bxb7+ Kxb7 6. Rxc7+ 6 3.63 ++ 1. Qcxc6+!! 6 10.24 16.35 1. Qcxc6+ Nec7 2. Bxa6 Qaxa6 3. Qcxc7+ Qexc7 4. Rxc7+ Kb8 5. Rxb7+ Kc8 6. Qfxf5+ 6-> 11.83 16.35 1. Qcxc6+ Nec7 2. Bxa6 Qaxa6 3. Qcxc7+ Qexc7 4. Rxc7+ Kb8 5. Rxb7+ Kc8 6. Qfxf5+ 7 20.36 16.29 1. Qcxc6+ Nec7 2. Bxa6 Qxe5 3. Qxb7+ Qxb7 4. Qxb7+ Kd7 5. Qxf5+ Qxf5 6. Qc6+ Ke7 7. Nxf5+ Kf8 8. Nxg7 Kxg7 9. Bxc7 7-> 35.85 16.29 1. Qcxc6+ Nec7 2. Bxa6 Qxe5 3. Qxb7+ Qxb7 4. Qxb7+ Kd7 5. Qxf5+ Qxf5 6. Qc6+ Ke7 7. Nxf5+ Kf8 8. Nxg7 Kxg7 9. Bxc7 8 38.99 ++ 1. Qcxc6+!! 8 3:48 Mat09 1. Qcxc6+ Nec7 2. Qxb7+ Qxb7 3. Qxb7+ Kxb7 4. Rxc7+ Nxc7 5. Qxc7+ Qxc7 6. Nc5+ Qxc5 7. Ba6+ Ka7 8. Bc8+ Na4 9. Qb8# 8 5:04 Mat08 1. Qgxc6+ Nac7 2. Rxa7 Qxa7 3. Qcxc7+ Nxc7 4. Qexc7+ Qaxc7 5. Qcxc7+ Qxc7 6. Rxc7+ Kb8 7. Rc8+ Kxc8 8. Qb8# 8-> 5:10 Mat08 1. Qgxc6+ Nac7 2. Rxa7 Qxa7 3. Qcxc7+ Nxc7 4. Qexc7+ Qaxc7 5. Qcxc7+ Qxc7 6. Rxc7+ Kb8 7. Rc8+ Kxc8 8. Qb8# 9 7:48 Mat08 1. Qgxc6+ Nac7 2. Rxa7 Qxa7 3. Qcxc7+ Nxc7 4. Qexc7+ Qaxc7 5. Qcxc7+ Qxc7 6. Rxc7+ Kb8 7. Rc8+ Kxc8 8. Qb8# 9-> 19:02 Mat08 1. Qgxc6+ Nac7 2. Rxa7 Qxa7 3. Qcxc7+ Nxc7 4. Qexc7+ Qaxc7 5. Qcxc7+ Qxc7 6. Rxc7+ Kb8 7. Rc8+ Kxc8 8. Qb8# 10 52:06 Mat08 1. Qgxc6+ Nac7 2. Rxa7 Qxa7 3. Qcxc7+ Nxc7 4. Qexc7+ Qaxc7 5. Qcxc7+ Qxc7 6. Rxc7+ Kb8 7. Rc8+ Kxc8 8. Qb8# 10-> 116:48 Mat08 1. Qgxc6+ Nac7 2. Rxa7 Qxa7 3. Qcxc7+ Nxc7 4. Qexc7+ Qaxc7 5. Qcxc7+ Qxc7 6. Rxc7+ Kb8 7. Rc8+ Kxc8 8. Qb8# 11 319:52 Mat08 1. Qgxc6+ Nac7 2. Rxa7 Qxa7 3. Qcxc7+ Nxc7 4. Qexc7+ Qaxc7 5. Qcxc7+ Qxc7 6. Rxc7+ Kb8 7. Rc8+ Kxc8 8. Qb8# White(1): exit White(1): q execution complete.
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.