Author: Dann Corbit
Date: 01:07:49 11/10/99
Go up one level in this thread
On November 10, 1999 at 03:37:47, Bernhard Bauer wrote: >On November 09, 1999 at 17:17:06, James Robertson wrote: [snip] >I gave this position to crafty and did a search Nd5. Here are the results for >crafty16.19 and crafty17.0. > >Crafty16.19 >=========== > > 12-> 11.30 -0.07 1. Nd5 exd5 2. Bxf6 Bxf6 3. Qxh7+ Kf8 > 4. cxd5 d6 5. Bh5 Rc8 6. Nxf7 Nd7 7. > Ng5 Qc2 8. Ne6+ Ke7 9. Rd3 Qxa2 10. > Nxg7 > 13 27.83 0.13 1. Nd5 exd5 2. Bxf6 Bxf6 3. Qxh7+ Kf8 > 4. cxd5 d6 5. Bh5 Rc8 6. Nxf7 a5 7. > Qf5 Ba6 8. Rc1 Qxc1 9. Rxc1 Rxc1+ > 13-> 27.83 0.13 1. Nd5 exd5 2. Bxf6 Bxf6 3. Qxh7+ Kf8 > 4. cxd5 d6 5. Bh5 Rc8 6. Nxf7 a5 7. > Qf5 Ba6 8. Rc1 Qxc1 9. Rxc1 Rxc1+ > 14 44.83 ++ 1. Nd5!! > 14-> 1:18 0.52 1. Nd5 exd5 2. Bxf6 Bxf6 3. Qxh7+ Kf8 > 4. cxd5 d6 5. Bh5 Rc8 6. Nxf7 a5 7. > Qf5 Ba6 8. Rc1 Qxc1 9. Rxc1 Rxc1+ > 15 2:12 ++ 1. Nd5!! > 15-> 8:59 0.91 1. Nd5 exd5 2. Bxf6 Bxf6 3. Qxh7+ Kf8 > 4. cxd5 d6 5. Bh5 Rc8 6. Nxf7 a5 7. > Qf5 Ba6 8. Rc1 Qxc1 9. Rxc1 Rxc1+ > time=15:00 cpu=199% mat=0 n=476806687 fh=96% nps=529508 > ext-> checks=46001900 recaps=737487 pawns=154520 1rep=5107499 thrt:139967 > predicted=0 nodes=476806687 evals=31020644 > endgame tablebase-> probes done=0 successful=0 > SMP-> split=1274 stop=164 data=10/64 cpu=29:59 elap=15:00 > >and >crafty17.0 >========== > > 12-> 15.23 -0.67 1. Nd5 exd5 2. Bxf6 Bxf6 3. Qxh7+ Kf8 > 4. cxd5 d6 5. Bh5 Rc8 6. Nxf7 Nd7 7. > Ng5 Qc2 8. Ne6+ Ke7 9. Rd3 Qxa2 10. > Nxg7 > 13 30.92 -0.60 1. Nd5 exd5 2. Bxf6 Bxf6 3. Qxh7+ Kf8 > 4. cxd5 d6 5. Bh5 Rc8 6. Nxf7 a5 7. > Bg6 Qc5 8. e4 Nd7 > 13-> 30.92 -0.60 1. Nd5 exd5 2. Bxf6 Bxf6 3. Qxh7+ Kf8 > 4. cxd5 d6 5. Bh5 Rc8 6. Nxf7 a5 7. > Bg6 Qc5 8. e4 Nd7 > 14 46.22 ++ 1. Nd5!! > 14-> 1:35 -0.21 1. Nd5 exd5 2. Bxf6 Bxf6 3. Qxh7+ Kf8 > 4. cxd5 d6 5. Bh5 Rc8 6. Nxf7 a5 7. > Bg6 Qc5 8. e4 Nd7 > 15 3:43 0.00 1. Nd5 exd5 2. Bxf6 Bxf6 3. Qxh7+ Kf8 > 4. cxd5 d6 5. Bh5 Ke7 6. Nxf7 Rc8 7. > Qf5 Kf8 8. Qf4 Ke7 9. Qf5 > 15-> 3:43 0.00 1. Nd5 exd5 2. Bxf6 Bxf6 3. Qxh7+ Kf8 > 4. cxd5 d6 5. Bh5 Ke7 6. Nxf7 Rc8 7. > Qf5 Kf8 8. Qf4 Ke7 9. Qf5 > 16 10:51 0.00 1. Nd5 exd5 2. Bxf6 Bxf6 3. Qxh7+ Kf8 > 4. cxd5 d6 5. Bh5 Bxg5 6. Qh8+ Ke7 > 7. Qxg7 Rf8 8. Qxg5+ Ke8 9. Rc1 Qd8 > 10. Qf5 Nd7 11. a3 Qf6 > 16-> 10:51 0.00 1. Nd5 exd5 2. Bxf6 Bxf6 3. Qxh7+ Kf8 > 4. cxd5 d6 5. Bh5 Bxg5 6. Qh8+ Ke7 > 7. Qxg7 Rf8 8. Qxg5+ Ke8 9. Rc1 Qd8 > 10. Qf5 Nd7 11. a3 Qf6 >time=15:00 cpu=200% mat=0 n=314623673 fh=93% nps=349445 >ext-> checks=16736788 recaps=643735 pawns=162104 1rep=1411877 thrt:97472 >predicted=0 nodes=314623673 evals=206046602 >endgame tablebase-> probes done=0 successful=0 >hashing-> trans/ref=23% pawn=2% used=99% >SMP-> split=1349 stop=171 data=10/64 cpu=30:01 elap=15:00 > >Comparing these results show: > > Crafty16.19 Crafty17.0 >score(15) 0.91 0.0 >nps 529508 349445 > >So for this position crafty16.19 looks much better than crafty17.0. >Crafty17.0 is 34% slower than crafty16.19, not to mention the evaluation. >BTW computation was done on a 2xPIII 450MHz computer running WinNT4.0. Actually, crafty 17.0 beat the pants off of 16.19. It finished ply 15 at 3:43 compared to 8:59 so it looks to be much more than twice as fast. The nodes mean nothing compared to finishing a ply.
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