Author: Albert Silver
Date: 03:15:51 02/23/04
Go up one level in this thread
On February 22, 2004 at 22:28:29, Albert Silver wrote: >On February 22, 2004 at 04:02:32, Kurt Utzinger wrote: > >>[D]rnb1k2r/pp1pp1bp/6p1/2pn2B1/8/2NB1N2/PqPQ2PP/1R2K2R w Kkq - 0 11 >>Reti,R - Euwe,M (Amsterdam 1920) >>Position before 11.Nxd5!! (or ?!) >> >> >>[Event "Amsterdam m"] >>[Site "Amsterdam"] >>[Date "1920.??.??"] >>[Round "2"] >>[White "Reti, Richard"] >>[Black "Euwe, Max"] >>[Result "1-0"] >>[ECO "A83"] >>[PlyCount "33"] >>[EventDate "1920.??.??"] >> >>1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 g6 5. f3 exf3 6. Nxf3 Bg7 7. Bd3 c5 8. d5 >>Qb6 9. Qd2 Qxb2 10. Rb1 Nxd5 11. Nxd5 Qxb1+ 12. Kf2 Qxh1 13. Bxe7 d6 14. Bxd6 >>Nc6 15. Bb5 Bd7 16. Bxc6 bxc6 17. Qe2+ 1-0 > >Since Hurd showed that Shredder 8 had a vague idea of the value of Nxd5, I >entered the first 4 plies and let Shredder 7.04 sit on it to see if it broke >away from the perpetual it was displaying in the mainline. Until ply 14 nothing, >but then it did a huge leap forward. > >Analysis by Shredder 7.04: > >13.Nc7+ Kd8 14.Bxe7+ Kxc7 15.Qf4+ Kb6 16.Qd6+ Nc6 17.Qxc5+ Kc7 18.Bd6+ Kd8 >19.Qg5+ Ke8 20.Bxg6+ hxg6 21.Qxg6+ Kd8 22.Qxg7 Qa1 23.Qxa1 Rh6 >+- (3.02) Depth: 15/49 00:20:35 280318kN >(Silver, Private 23.02.2004) Even more interesting was to see that Fritz 8 agrees with Reti's choice of 13.Bxe7 contrary to the other engines, albeit after at least 1 hour on my Athlon 1 GHz, and with the first 4 plies of the line fed to it: Reti,R - Euwe,M rnb1k2r/pp1pp1bp/6p1/2pN2B1/8/3B1N2/P1PQ1KPP/7q w kq - 0 1 Analysis by Fritz 8: 13.Nc7+ Kd8 14.Bxe7+ Kxe7 15.Qg5+ Kd6 16.Nb5+ Kc6 17.Qg3 Qxh2 18.Qxh2 c4 19.a4 Kb6 20.Nc7 cxd3 21.Nxa8+ ³ (-0.69) Depth: 11/38 00:00:24 10251kN 13.Nc7+! ³ (-0.41) Depth: 12/39 00:02:16 56352kN 13.Nc7+! = (-0.12) Depth: 12/39 00:02:19 57575kN 13.Nc7+ Kd8 14.Bxe7+ Kxc7 15.Qf4+ Kb6 16.Qd6+ Nc6 17.Qxc5+ Kc7 = (0.00) Depth: 12/43 00:02:44 69202kN 13.Nc7+ Kd8 14.Bxe7+ Kxc7 15.Qf4+ Kb6 16.Qd6+ Nc6 17.Qxc5+ Kc7 18.Qd6+ Kb6 19.Qc5+ = (0.00) Depth: 13/48 00:04:32 117650kN 13.Nc7+ Kd8 14.Bxe7+ Kxc7 15.Qf4+ Kb6 16.Qd6+ Nc6 17.Qxc5+ Kc7 18.Qd6+ Kb6 19.Qc5+ = (0.00) Depth: 14/46 00:10:00 259328kN 13.Bxe7 = (0.03) Depth: 14/46 01:18:01 1000228kN 13.Bxe7 = (0.19) Depth: 14/46 01:28:26 1270043kN 13.Bxe7 ² (0.50) Depth: 14/46 01:42:30 1636963kN 13.Bxe7 Qa1 14.Bd6 Rf8 15.Qe2+ Kf7 16.Bc4 Kg8 17.Nc7+ Kh8 18.Bxf8 Bd4+ 19.Kg3 d5 ± (1.09) Depth: 14/46 02:15:41 2530715kN 13.Bxe7! ± (1.38) Depth: 15/52 03:06:58 3912343kN 13.Bxe7! +- (1.66) Depth: 16/51 05:32:30 7867274kN 13.Bxe7! +- (1.94) Depth: 16/51 07:18:25 10701233kN (Silver, Private 23.02.2004)
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