Author: Ulrich Tuerke
Date: 12:55:48 08/29/02
Go up one level in this thread
On August 29, 2002 at 01:10:12, Terry Ripple wrote: >On August 29, 2002 at 00:57:03, Mark Young wrote: > >>On August 28, 2002 at 23:03:19, Tanya Deborah wrote: >> >>> >>>Hi CCC! >>> >>>Look the 17. Lasker move (Bxa6!!) >>> >>>Great game! Any program can find this move? >> >> >>[D]2kr1b1r/1ppnqp2/p3b2p/Q2p4/3P2pN/2N3P1/PPP2PP1/2KR1B1R w - - 0 1 >> >>Analysis by Fritz 7: >> >>1.Bd3! >> ³ (-0.47) Depth: 8/22 00:00:00 243kN >>1.Bd3! Qf6 2.Rhf1 Re8 3.Ne2 Nb8 >> ³ (-0.37) Depth: 8/23 00:00:00 289kN >>1.Bd3 Qf6 2.Rhf1 Nb6 3.Ne2 Nc4 4.Qc3 Re8 5.Nf4 >> ³ (-0.34) Depth: 9/28 00:00:01 772kN >>1.Bd3 Qf6 2.Bxa6 Qxf2 3.Bd3 Nb6 4.Na4 Qxd4 5.Nxb6+ Qxb6 6.Qa8+ Kd7 >> ³ (-0.34) Depth: 10/28 00:00:02 1736kN >>1.Bd3 Qf6 2.Bxa6 Qxf2 3.Bf1 c6 4.Qa8+ Nb8 5.Rd3 Bd6 6.Nd1 Qf6 >> ³ (-0.37) Depth: 11/30 00:00:05 4125kN >>1.Bd3 Qf6 2.Bxa6 Qxf2 3.Be2 Be7 4.Qa8+ Nb8 5.Rd3 Bxh4 6.Rxh4 Qe1+ 7.Bd1 Bf5 >>8.Rd2 >> = (-0.25) Depth: 12/38 00:00:15 12741kN >>1.Bd3 Nb6 2.Na4 Nc4 3.Qc3 Bg7 4.b3 Nd6 5.Nc5 Ne4 6.Bxe4 dxe4 7.Nxe4 Bxb3 8.axb3 >> ³ (-0.31) Depth: 13/36 00:00:58 48446kN >>1.Ne2! >> ³ (-0.28) Depth: 13/36 00:01:02 52212kN >>1.Ne2! Nf6 2.Nf4 Ne4 3.Qe1 Qg5 4.Kb1 Re8 5.Bd3 Bd6 6.Bxe4 dxe4 7.Nxe6 Rxe6 >> = (-0.22) Depth: 13/36 00:01:07 56280kN >>1.Ne2 Nf6 2.Nf4 Ne4 3.Qe1 Qg5 4.Kb1 Bg7 5.Nhg6 Rhe8 6.Nxe6 Rxe6 7.Nf4 Re7 8.Be2 >> = (-0.25) Depth: 14/34 00:01:27 73859kN >>1.Ne2 Qf6 2.Nf4 Bd6 3.Qd2 Nb6 4.c3 Rde8 5.Re1 Kb8 6.Nxe6 Rxe6 7.Bd3 Rxe1+ >> ³ (-0.31) Depth: 15/38 00:04:05 206885kN >>1.Bxa6! >> ³ (-0.28) Depth: 15/41 00:06:26 332163kN >>1.Bxa6! >> = (-0.12) Depth: 15/41 00:07:54 410104kN >>1.Bxa6! bxa6 2.Qxa6+ Kb8 3.Nb5 Nb6 4.Rd3 Qg5+ 5.Kb1 Bd6 6.Qa7+ Kc8 7.Rc3 Nc4 >>8.Nxd6+ >> = (-0.09) Depth: 15/41 00:08:38 446222kN >>1.Bxa6! >> = (0.19) Depth: 16/45 00:14:19 744618kN >>1.Bxa6! >> ² (0.47) Depth: 16/45 00:26:56 1408778kN >> >>(Young, MyTown 28.08.2002) >----------------- >I'am really surprised that it takes over 6 min. for Fritz 7 to even consider the >move Bxa6! Several of the top programs consider it almost instantly. The reason it that programs don't see the win. It depends much on some details how king safety is done. A few centipawns more or less decide whether Bxa6 or Bd3 will be chosen. IMHO, it's not a very useful test position because programs may select the solution move without seeing anything. Uli > >Regards, >Terry
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