Author: Joshua Lee
Date: 20:45:44 01/05/01
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Fritz6 - IM Nathanael Situru 4rrk1/1q4b1/p5p1/1pPP1p1p/4p1n1/1P4N1/P3QBPP/1R1R2K1 b - - 0 1 Analysis by Fritz 6: 23...Nxf2 = (0.19) Depth: 1/3 00:00:00 23...Nxf2 24.Qxf2 ² (0.66) Depth: 1/3 00:00:00 23...Nxf2 24.Qxf2 f4 ² (0.47) Depth: 2/5 00:00:00 23...Nxf2 24.Qxf2 f4 25.Ne2 ² (0.50) Depth: 3/13 00:00:00 1kN 23...Nf6 ² (0.47) Depth: 3/13 00:00:00 1kN 23...Nf6 24.c6 Qc7 25.Qe3 ² (0.69) Depth: 4/10 00:00:00 2kN 23...Nxf2! ² (0.66) Depth: 4/10 00:00:00 2kN 23...Nxf2! 24.Qxf2 f4 25.Ne2 Qc7 ² (0.34) Depth: 4/11 00:00:00 3kN 23...h4! ² (0.31) Depth: 4/11 00:00:00 4kN 23...h4 24.Nf1 Nxf2 25.Qxf2 h3 26.Ne3 hxg2 27.Kxg2 ² (0.56) Depth: 5/15 00:00:00 11kN 23...Nxf2! ² (0.53) Depth: 5/19 00:00:00 13kN 23...Nxf2 24.Qxf2 f4 25.Ne2 f3 26.gxf3 ² (0.47) Depth: 5/19 00:00:00 16kN 23...Nxf2 24.Qxf2 Re5 25.c6 Qc7 26.Qe3 f4 ² (0.34) Depth: 6/18 00:00:00 33kN 23...Re5! ² (0.31) Depth: 6/18 00:00:00 60kN 23...Re5! 24.c6 Qc7 25.Rbc1 Rd8 26.Rc5 Nxf2 27.Qxf2 = (0.00) Depth: 6/18 00:00:00 71kN 23...Re5 24.c6 Qc7 25.Rbc1 Rd8 26.Rc5 Nxf2 27.Qxf2 = (0.00) Depth: 7/18 00:00:00 113kN 23...Re5! = (-0.16) Depth: 8/21 00:00:00 244kN 23...Re5 24.c6 Qc7 25.a4 Nxf2 26.Qxf2 Rd8 27.axb5 axb5 28.Qc5 = (-0.19) Depth: 8/27 00:00:00 361kN 23...Re5 24.d6 e3 25.Be1 f4 26.Bc3 fxg3 27.Bxe5 Bxe5 = (-0.25) Depth: 9/25 00:00:02 1234kN 23...Re5 24.c6 Qc8 25.Rbc1 Rd8 26.d6 Re6 27.d7 Qc7 28.Qc2 = (0.00) Depth: 10/28 00:00:05 2983kN 23...Re5 24.c6 Qc8 25.Rbc1 Rd8 26.d6 Re6 27.d7 Qc7 28.Qc2 = (0.00) Depth: 11/29 00:00:15 8685kN 23...Re5 24.c6 Qc8 25.d6 Qxc6 26.Rbc1 Qd7 27.Rc7 Qd8 28.Bd4 = (-0.25) Depth: 12/31 00:00:37 20923kN 23...Re5 24.c6 Qc8 25.a4 Nxf2 26.Kxf2 Qb8 27.axb5 axb5 28.Nf1 ³ (-0.41) Depth: 13/34 00:01:31 53304kN 23...Re5 24.c6 Qc8 25.Rbc1 Rd8 26.d6 Re6 27.a4 Nxf2 28.Kxf2 ³ (-0.34) Depth: 14/37 00:03:20 119326kN 23...Re5 24.c6 Qc8 25.a4 Nxf2 26.Kxf2 Qb8 27.axb5 axb5 28.b4 ³ (-0.50) Depth: 15/39 00:10:45 389930kN 23...Re5 24.c6 Qc8 25.Rbc1 Rd8 26.d6 Re6 27.a4 Nxf2 28.Kxf2 ³ (-0.38) Depth: 16/41 00:24:53 915549kN 23...Nxf2 ³ (-0.41) Depth: 16/43 00:40:32 1469441kN 23...Nxf2 24.Qxf2 f4 25.Nf1 Qc8 26.c6 Re5 27.Rbc1 e3 28.Qe2 ³ (-0.34) Depth: 17/41 02:03:47 4507234kN 23...Re5 ³ (-0.38) Depth: 17/43 02:18:33 5063435kN 23...Re5 24.c6 Qc8 25.Rbc1 Rd8 26.d6 Re6 27.a4 Nxf2 28.Kxf2 ³ (-0.50) Depth: 17/46 03:01:20 6682712kN 23...e3 ³ (-0.53) Depth: 17/46 04:05:35 9082320kN 23...e3 24.Be1 f4 25.Nf1 Ne5 26.c6 Qc8 27.Bh4 f3 28.Qxe3 µ (-0.81) Depth: 18/45 04:30:03 9989920kN (Lee, Pensacola,Fl 05.01.2001) e3! is the move to find but it takes so long as you can see. I have seen only 1 other position take longer and that was Nolot 5 that i solved. Are there any that are more difficult? nolot 5 took over 20 hours (19/50ply). besides this find the mistakes by fritz in this game obviously prior to move 23 and other games at tournament time controls you will notice these high depths are needed to somewhat understand GM (or strong IM) level chess.
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