Author: Mark Young
Date: 14:57:04 09/11/99
Go up one level in this thread
On September 11, 1999 at 16:21:53, James Robertson wrote: >Today in a game with blik on FICS, my program reached the following position: > >2r1r1k1/3p1p1p/p2Qp1p1/q1N2P2/Pn1B1P2/6P1/2P3bP/2KRR3 b - - > >After about 3 seconds my program played ... Bf3?? which loses to Qe5. I ran my >program on the position after the game it only then did it realise that ... >Na2+! wins (and wins big). > >It takes it 9.5 seconds to realise that, a little too slow for the game. Crafty >16.16 takes about 20 seconds to find ... Na2 (in the meantime it plays ... Rb8 >which it says wins material) on the same hardware (P233, 4MB hash table). > >Anyway, here is my program's output. What does your program say about the >position? > >Depth Score Time Nodes PV > 1 -30 0 191 Qc7 Qxc7 Rxc7 fxe6 fxe6 > 2 -30 0 1130 Qc7 Qxc7 Rxc7 fxe6 fxe6 > 3 6 50 5768 Bf3 fxg6 Bxd1 Rxd1 hxg6 Qxd7 > 4 19 220 22509 Bc6 Nxd7 Bxd7 Qxd7 Rxc2+ Kb1 > 5> 70 660 66198 exf5 Rxe8+ Rxe8 Qxd7 Bc6 Qd6 Bxa4 > 5 70 770 78189 exf5 Rxe8+ Rxe8 Qxd7 Bc6 Qd6 Bxa4 > 6> 21 2800 301776 Bf3 Qe5 Na2+ Kb1 f6 Qxf6 Bxd1 Rxd1 > 6 21 3620 392090 Bf3 Qe5 Na2+ Kb1 f6 Qxf6 Bxd1 Rxd1 > 7> 168 9550 1062091 Na2+ Kb2 Qb4+ Kxa2 Bd5+ c4 Qxc4+ Kb1 Rb8+ > Bb2 Qa2+ Kc1 Qxb2+ > 7 168 9830 1099308 Na2+ Kb2 Qb4+ Kxa2 Bd5+ c4 Qxc4+ Kb1 Rb8+ > Bb2 Qa2+ Kc1 Qxb2+ > 8 260 12190 1392528 Na2+ Kb2 Qb4+ Kxa2 Bd5+ c4 Qxc4+ Kb1 Rb8+ > Bb2 Qa2+ Kc2 Qxb2+ Kd3 Qxh2 fxg6 fxg6 > 9 260 16260 1938555 Na2+ Kb2 Qb4+ Kxa2 Bd5+ c4 Qxc4+ Kb1 Rb8+ > Bb2 Qa2+ Kc2 Qxb2+ Kd3 Qxh2 fxg6 fxg6 > 10 390 31250 3854123 Na2+ Kb2 Qb4+ Kxa2 Bd5+ Qxd5 exd5 c3 Qc4+ > Ka3 d6 Nb3 Rxe1 Rxe1 gxf5 > 11 392 56680 7268592 Na2+ Kb2 Qb4+ Kxa2 Bd5+ Qxd5 exd5 c3 Qc4+ > Ka3 Re2 Nb3 Rxh2 fxg6 hxg6 Re7 New position 2r1r1k1/3p1p1p/p2Qp1p1/q1N2P2/Pn1B1P2/6P1/2P3bP/2KRR3 b - - 0 1 Analysis by Fritz 5.00/16Bit: 1...Rxc5 2.Bxc5 +- (1.56) depth: 1/1 00:00:00 1...Nxc2 +- (1.53) depth: 1/7 00:00:00 1...Nxc2 2.Kxc2 gxf5 ± (1.09) depth: 1/7 00:00:00 1...exf5 ³ (-0.28) depth: 1/8 00:00:00 1...exf5 2.Rxe8+ Rxe8 3.Qxd7 ³ (-0.28) depth: 2/2 00:00:00 1...Rb8 ³ (-0.31) depth: 2/6 00:00:00 1...Rb8 2.c3 Na2+ 3.Kc2 ³ (-0.50) depth: 3/3 00:00:00 3kN 1...Bf3 ³ (-0.53) depth: 3/17 00:00:00 8kN 1...Bf3 2.fxg6 hxg6 3.Qxd7 Bxd1 4.Rxd1 µ (-0.97) depth: 3/23 00:00:00 11kN 1...Bf3 2.fxg6 hxg6 3.Qxd7 Bxd1 4.Rxd1 µ (-0.97) depth: 4/4 00:00:00 16kN 1...Bf3 2.fxg6 Rc7 3.gxf7+ Kxf7 4.h3 Bxd1 5.Rxd1 = (0.03) depth: 5/5 00:00:01 65kN 1...Rb8 = (0.00) depth: 5/29 00:00:01 107kN 1...Rb8 2.Kd2 Na2+ 3.Kd3 Bf3 4.fxg6 Bxd1 5.gxf7+ Kxf7 6.Rxd1 µ (-0.75) depth: 5/29 00:00:01 113kN 1...Rb8 2.c3 Na2+ 3.Kd2 µ (-0.81) depth: 6/6 00:00:01 209kN 1...Na2+ µ (-0.84) depth: 6/26 00:00:01 305kN 1...Na2+ 2.Kb2 Qb4+ 3.Kxa2 Bd5+ 4.c4 Qxc4+ 5.Kb1 Rb8+ 6.Bb2 -+ (-3.03) depth: 6/26 00:00:01 354kN 1...Na2+ 2.Kb2 Qb4+ 3.Kxa2 Bd5+ 4.c4 Qxc4+ 5.Kb1 Rb8+ 6.Bb2 -+ (-3.03) depth: 7/7 00:00:02 455kN 1...Na2+ 2.Kb2 Qb4+ 3.Kxa2 Bd5+ 4.Qxd5 exd5 5.Rxe8+ Rxe8 6.fxg6 -+ (-3.16) depth: 8/8 00:00:03 648kN 1...Na2+ 2.Kb2 Qb4+ 3.Kxa2 Bd5+ 4.Qxd5 exd5 5.Rxe8+ Rxe8 6.fxg6 -+ (-3.16) depth: 9/9 00:00:06 1317kN 1...Na2+ 2.Kb2 Qb4+ 3.Kxa2 Bd5+ 4.Qxd5 exd5 5.Rxe8+ Rxe8 6.fxg6 -+ (-3.34) depth: 10/10 00:00:14 2972kN 1...Na2+ -+ (-3.66) depth: 11/11 00:00:30 8603kN (Young, 9/11/99)
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