Author: Uri Blass
Date: 02:45:33 03/17/02
Go up one level in this thread
On March 17, 2002 at 02:25:25, Slater Wold wrote: >This position came up on an ICC game: > >[D]r1b2rk1/pp1n1ppp/4pB2/2R1P3/8/3B4/q4PPP/3Q1RK1 b - - 0 17 > >This is from my log: > >White(17): Bf6 > time used: 31.43 > time limit 14.74 (1:39) > nss depth time score variation (1) > 7 0.21 ++ 17. ... Re8!! > 7 0.35 -0.87 17. ... Re8 18. Qg4 g6 19. Bb5 Nxc5 > 20. Bxe8 Bd7 21. Bxd7 Nxd7 > 7 0.72 ++ 17. ... gxf6!! > 7 1.33 -3.42 17. ... Qa3 18. Qg4 g6 19. Rxc8 Rfxc8 > 20. Be4 Nxf6 21. exf6 Qb3 > (4) 7-> 1.39 -3.42 17. ... Qa3 18. Qg4 g6 19. Rxc8 Rfxc8 > 20. Be4 Nxf6 21. exf6 Qb3 > 8 1.66 -- 17. ... Qa3 > (3) 8 2.00 0.00 17. ... Qa3 18. Bxh7+ Kxh7 19. Qh5+ > Kg8 20. Bxg7 Kxg7 21. Qg5+ Kh7 22. > Qh5+ Kg7 > 8 2.64 ++ 17. ... Re8!! > 8 4.02 -0.93 17. ... Re8 18. Qh5 h6 19. Qg4 g6 20. > Rc7 Qd5 21. Qg3 Nxf6 22. exf6 > 8-> 5.61 -0.93 17. ... Re8 18. Qh5 h6 19. Qg4 g6 20. > Rc7 Qd5 21. Qg3 Nxf6 22. exf6 > 9 6.35 -- 17. ... Re8 > 9 16.54 5.92 17. ... Re8 18. Bxh7+ Kh8 19. Qh5 Qe2 > 20. Qxf7 gxf6 21. Qxe8+ Kxh7 22. Rxc8 > Nxe5 23. Qg8+ Kh6 24. Rxa8 > 9 16.88 ++ 17. ... Qa3!! > time=17.11 cpu=196% mat=-2 n=24143380 fh=94% nps=1411k > ext-> chk=1598422 cap=47309 pp=18507 1rep=176270 mate=14056 >sing=10 > predicted=16 nodes=24143380 evals=2438674 > endgame tablebase-> probes done=0 successful=0 > hashing-> trans/ref=28% pawn=99% used=65% > SMP-> split=482 stop=108 data=8/32 cpu=33.65 elap=17.11 > >I don't think there is a worse move than Qa3. I cringed when I saw this move >played. > >Oh well, that's why I am playing there, to catch these little things. So I go >back to my engine, and feed it the position, and let it think for 60 seconds. > >Here is the eval: > >White(1): setboard r1b2rk1/pp1n1ppp/4pB2/2R1P3/8/3B4/q4PPP/3Q1RK1 b - - 0 17 >Black(1): go > clearing hash tables > time surplus 0.00 time limit 1:00 (1:00) > nss depth time score variation (1) >starting thread 1 > (2) 7-> 0.25 -7.16 1. ... Nxc5 2. Qg4 g6 3. Bc4 Qc2 4. > Rd1 Qf5 > 8 0.39 -- 1. ... Nxc5 > 8 0.73 Mat06 1. ... Nxc5 2. Bxh7+ Kxh7 3. Qh5+ Kg8 > 4. Qg4 g6 5. Qh4 Qxf2+ 6. Rxf2 Nd7 > 7. Qh8# > 8 1.11 ++ 1. ... gxf6!! > 8 2.86 0.00 1. ... gxf6 2. Bxh7+ Kxh7 3. Qh5+ Kg8 > 4. Qg4+ Kh7 5. Qh5+ > 8 3.16 ++ 1. ... Re8!! > 8 3.98 -0.85 1. ... Re8 2. Bb5 Nxc5 3. Qg4 g6 4. > Bxe8 Nd7 5. Bxd7 Bxd7 > (2) 8-> 6.33 -0.85 1. ... Re8 2. Bb5 Nxc5 3. Qg4 g6 4. > Bxe8 Nd7 5. Bxd7 Bxd7 > 9 7.63 -- 1. ... Re8 > 9 8.97 4.60 1. ... Re8 2. Bxh7+ Kxh7 3. Qh5+ Kg8 > 4. Qg5 Nxf6 5. exf6 Qxf2+ 6. Kxf2 g6 > 7. Rc7 Rd8 8. Re7 a5 > 9 10.55 ++ 1. ... gxf6!! > 9 16.50 1.16 1. ... gxf6 2. Bxh7+ Kh8 3. Qh5 Qe2 > 4. Qh6 Qd2 5. Qxd2 Nxc5 6. Qh6 > 9 19.80 ++ 1. ... Nxf6!! > 9 21.38 -0.38 1. ... Nxf6 2. exf6 Qb2 3. Bxh7+ Kxh7 > 4. Qh5+ Kg8 5. fxg7 Qxg7 6. Rg5 f6 > 7. Rxg7+ Kxg7 8. Rd1 a5 9. g3 > (4) 9-> 24.44 -0.38 1. ... Nxf6 2. exf6 Qb2 3. Bxh7+ Kxh7 > 4. Qh5+ Kg8 5. fxg7 Qxg7 6. Rg5 f6 > 7. Rxg7+ Kxg7 8. Rd1 a5 9. g3 > (3) 10 28.78 -0.37 1. ... Nxf6 2. exf6 Qb2 3. Bxh7+ Kxh7 > 4. Qh5+ Kg8 5. fxg7 Qxg7 6. Rg5 f6 > 7. Rxg7+ Kxg7 8. Rd1 a5 9. f4 a4 10. > Kf2 > 10-> 36.83 -0.37 1. ... Nxf6 2. exf6 Qb2 3. Bxh7+ Kxh7 > 4. Qh5+ Kg8 5. fxg7 Qxg7 6. Rg5 f6 > 7. Rxg7+ Kxg7 8. Rd1 a5 9. f4 a4 10. > Kf2 > 11 51.30 -0.22 1. ... Nxf6 2. exf6 Qb2 3. Bxh7+ Kxh7 > 4. Qh5+ Kg8 5. fxg7 Qxg7 6. Rg5 f6 > 7. Rxg7+ Kxg7 8. Qg4+ Kf7 9. Qh5+ Ke7 > 10. Qc5+ Ke8 11. Rd1 Kf7 12. f4 > time=1:00 cpu=234% mat=-2 n=82822082 fh=90% nps=1372k > ext-> chk=3645381 cap=287364 pp=75218 1rep=496025 mate=38058 sing= >25 > predicted=0 nodes=82822082 evals=16376870 > endgame tablebase-> probes done=0 successful=0 > hashing-> trans/ref=33% pawn=28% used=96% > SMP-> split=1927 stop=605 data=7/32 cpu=2:21 elap=1:00 > > >Never even evaluates it. Strange!! > >Same version, settings, everything. I know it *probably* has to do with hash >and other in-game conditions. (And yes, positional learning _IS_ disabled.) >But it's *very* hard to diagnose a problem that cannot be reproduced. :( > >Anything but Nxf6 here is just wrong. Most programs will evaluate Qa3 (and >other losers) but fail low quickly on them, and move on to Nxf6. Here is the output of my program 33018 <first : 1 666 2 44 d7c5 33028 <first : 2 671 3 138 d7c5 f6e7 33028 <first : 2 671 3 199 d7c5 f6e7 33028 <first : 3 626 3 579 d7c5 f6e7 c5d3 e7f8 d3e5 33038 <first : 3 626 4 1494 d7c5 f6e7 c5d3 e7f8 d3e5 33048 <first : 4 626 5 3085 d7c5 f6e7 c5d3 e7f8 d3e5 33058 <first : 4 626 6 4646 d7c5 f6e7 c5d3 e7f8 d3e5 33078 <first : 5 626 8 9466 d7c5 f6e7 c5d3 e7f8 d3e5 33148 <first : 5 626 15 22238 d7c5 f6e7 c5d3 e7f8 d3e5 33218 <first : 6 611 22 35707 d7c5 f6e7 c5d3 e7f8 d3e5 f8c5 33368 <first : 6 611 37 62603 d7c5 f6e7 c5d3 e7f8 d3e5 f8c5 33809 <first : 7 616 81 149815 d7c5 f6e7 c5d3 e7f8 d3e5 f8d6 a2b2 d6e5 b2e5 34290 <first : 7 616 129 245283 d7c5 f6e7 c5d3 e7f8 d3e5 f8d6 a2b2 d6e5 b2e5 36543 <first : 8 121 354 694264 d7c5 d3h7 g8h7 d1h5 h7g8 h5g4 g7g6 g4h3 a2f2 f1f2 c8d7 42111 <first : 8 122 911 1753136 d7f6 50593 <first : 8 166 1759 3279678 d7f6 e5f6 a2b2 f6g7 b2g7 f1e1 f7f5 c5c1 58775 <first : 8 167 2577 4827564 a2a3 64353 <first : 8 347 3135 5860162 a2a3 d1g4 g7g6 c5c8 a8c8 d3b5 d7f6 e5f6 65975 <first : 8 347 3297 6154050 a2a3 d1g4 g7g6 c5c8 a8c8 d3b5 d7f6 e5f6 112783 <first : 9 152 7978 14960897 a2a3 c5c4 d7f6 e5f6 g7f6 d3h7 g8h8 h7e4 e6e5 c4c1 137368 <first : 9 153 10437 19457049 d7f6 161863 <first : 9 172 12886 23656321 d7f6 e5f6 a2b2 d1h5 h7h6 f6g7 b2g7 h5e5 f7f6 182994 <first : 9 172 14999 27653765 d7f6 e5f6 a2b2 d1h5 h7h6 f6g7 b2g7 h5e5 f7f6 351766 <first : 10 -5 31876 57793508 d7f6 e5f6 a2b2 d3h7 g8h7 d1h5 h7g8 f6g7 b2g7 c5g5 c8d7 g5g7 g8g7 571432 <first : 10 -4 53843 100132014 a2a3 830174 <first : 10 -4 79717 149055075 f8e8 985508 <first : 10 -4 95251 178841613 b7b6 1086783 <first : 10 21 105378 198269682 b7b6 d3h7 g8h7 d1h5 h7g8 f6g7 f7f5 e5f6 e6e5 h5h8 g8f7 h8h5 f7e6 h5g4 e6f7 c5c8 f8c8 g4d7 1128243 <first : 10 21 109523 205910297 b7b6 d3h7 g8h7 d1h5 h7g8 f6g7 f7f5 e5f6 e6e5 h5h8 g8f7 h8h5 f7e6 h5g4 e6f7 c5c8 f8c8 g4d7 1128243 <first : move b7b6 After almost 20 minutes on pIII800 it likes b6 It has wrong fail high on Qa3 and Re8 but these moves are never get played Unfortunately it does not know to extend an important line so it need depth 11 to see that b6 is losing and I did not give it enough time After Qa3 it needs some minutes to see a forced mate 33348 <first : 1 -341 3 310 c5c8 a8c8 33348 <first : 2 -341 3 356 c5c8 a8c8 33348 <first : 2 -341 3 596 c5c8 a8c8 33348 <first : 3 -368 3 796 c5c8 a8c8 d3e4 d7f6 e5f6 g7f6 e4b7 33368 <first : 3 -368 5 2942 c5c8 a8c8 d3e4 d7f6 e5f6 g7f6 e4b7 33368 <first : 4 -368 5 3602 c5c8 a8c8 d3e4 d7f6 e5f6 g7f6 e4b7 33408 <first : 4 -368 9 9234 c5c8 a8c8 d3e4 d7f6 e5f6 g7f6 e4b7 33428 <first : 5 -368 11 12565 c5c8 a8c8 d3e4 d7f6 e5f6 g7f6 e4b7 33748 <first : 5 -367 43 72839 d1g4 33788 <first : 5 -337 47 79064 d1g4 g7g6 c5c8 a8c8 d3e4 33828 <first : 5 -337 51 87917 d1g4 g7g6 c5c8 a8c8 d3e4 33899 <first : 6 -347 58 99869 d1g4 g7g6 c5c8 a8c8 d3e4 a3b3 34780 <first : 6 -347 146 268433 d1g4 g7g6 c5c8 a8c8 d3e4 a3b3 35341 <first : 7 -347 202 372102 d1g4 g7g6 c5c8 a8c8 d3e4 a3b2 g4g5 39426 <first : 7 -347 610 1153936 d1g4 g7g6 c5c8 a8c8 d3e4 a3b2 g4g5 40738 <first : 8 -352 742 1400916 d1g4 g7g6 c5c8 a8c8 d3e4 a3b2 g4g5 d7c5 42461 <first : 8 -351 914 1734603 d3h7 45575 <first : 8 -285 1225 2357658 d3h7 g8h7 d1h5 h7g8 f6g7 g8g7 h5g5 g7h8 c5c4 d7f6 e5f6 64933 <first : 8 -285 3161 6125595 d3h7 g8h7 d1h5 h7g8 f6g7 g8g7 h5g5 g7h8 c5c4 d7f6 e5f6 75158 <first : 9 0 4184 8070473 d3h7 g8h7 d1h5 h7g8 f6g7 g8g7 h5g5 g7h8 g5h6 h8g8 h6g5 g8h7 g5h5 h7g8 h5g5 132100 <first : 9 0 9878 19259522 d3h7 g8h7 d1h5 h7g8 f6g7 g8g7 h5g5 g7h8 g5h6 h8g8 h6g5 g8h7 g5h5 h7g8 h5g5 170585 <first : 10 540 13726 26594531 d3h7 g8h7 d1h5 h7g8 h5g5 a3g3 f2g3 g7g6 c5c7 b7b6 g3g4 d7c5 274484 <first : 10 540 24116 47248083 d3h7 g8h7 d1h5 h7g8 h5g5 a3g3 f2g3 g7g6 c5c7 b7b6 g3g4 d7c5 348731 <first : 11 9987 31541 61190464 d3h7 g8h7 d1h5 h7g8 h5g5 d7f6 e5f6 a3g3 h2g3 g7g6 g5h6 f8e8 h6g7 386656 <first : 11 9987 35333 68946263 d3h7 g8h7 d1h5 h7g8 h5g5 d7f6 e5f6 a3g3 h2g3 g7g6 g5h6 f8e8 h6g7 386656 <first : move d3h7 Uri
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