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Subject: Re: Crafty missed 48...Ka5 against Falcon [test position]

Author: Vincent Lejeune

Date: 09:23:09 07/11/04

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[d]1R6/r2p4/1k6/1p2P3/pp6/6P1/1PP2P1P/6K1 b - - 0 48
Find Ka5 with bigger advantage than -3 for black !

Shredder 8 on a AMD barton@3000+ : 5min23sec

Analysis by Shredder 8:
...
48...Rc7 49.e6 dxe6 50.Tf8 Rb6 51.g4 a3 52.Tc8
  +-  (1.78)   Profondeur: 8/19   00:00:00  71kN
48...Rc7 49.e6 dxe6 50.Tf8 Rb7
  +-  (1.78)   Profondeur: 8/19   00:00:00  71kN
48...Rc7 49.e6 dxe6 50.Tf8 Rd6 51.Td8+ Re7 52.Td4 Tc7 53.Txb4 Txc2 54.Txb5
  +-  (1.56)   Profondeur: 9/17   00:00:00  89kN
48...Rc7 49.Txb5 a3 50.bxa3 bxa3 51.Tb1 a2 52.Ta1 Ta5 53.h4 Txe5
  +-  (1.81)   Profondeur: 10/18   00:00:00  108kN
48...Rc7 49.Txb5 d6
  +-  (2.36)   Profondeur: 10/18   00:00:00  109kN
48...Rc7 49.Txb5 a3 50.bxa3 bxa3 51.Tb1 Rc6 52.f4 d6 53.e6
  +-  (3.19)   Profondeur: 10/21   00:00:00  140kN
48...Rc5 49.c3 bxc3 50.e6
  +-  (3.18)   Profondeur: 10/23   00:00:00  168kN
48...Rc5 49.c3 bxc3 50.e6 cxb2 51.Tc8+ Rd4 52.Rg2 b1D 53.exd7 Txd7
  +-  (2.83)   Profondeur: 10/23   00:00:00  183kN
48...Rc5 49.c3 bxc3 50.Tc8+ Rd4 51.Txc3 Rxe5 52.Tc5+ d5 53.Txb5 Te7 54.f4+ Re4
  +-  (1.50)   Profondeur: 10/23   00:00:00  257kN
48...Ra5 49.e6 dxe6 50.h4 a3 51.f4 axb2 52.Txb5+ Rxb5 53.Rf2 b1D
  +-  (1.49)   Profondeur: 10/23   00:00:00  301kN
48...Ra5 49.e6 dxe6 50.h4 a3 51.f4 axb2 52.Txb5+ Rxb5 53.Rf2 b1D
  ±  (1.14)   Profondeur: 10/23   00:00:00  313kN
48...Ra5 49.e6 dxe6 50.Te8 Tc7 51.Ta8+ Rb6 52.Tb8+ Ra5 53.h4 Txc2 54.Rh1
  =  (0.20)   Profondeur: 10/23   00:00:00  343kN
48...Ra5 49.e6 dxe6 50.g4 a3 51.f4 axb2 52.Txb5+ Rxb5 53.c4+ Rxc4 54.Rg2 b1D
  =  (-0.05)   Profondeur: 11/17   00:00:00  395kN
48...Ra5 49.e6 dxe6 50.g4 a3 51.Td8 Rb6 52.Td6+ Rc5 53.Td1 Tg7 54.h3 axb2
  =  (-0.08)   Profondeur: 11/20   00:00:00  417kN
48...Ra5 49.e6 dxe6 50.g4 a3 51.Td8 axb2 52.Td1 Rb6 53.Td6+ Rc5 54.Tc6+ Rxc6
55.Rg2 b1D
  ³  (-0.33)   Profondeur: 12/23   00:00:01  546kN
48...Ra5 49.e6 dxe6 50.Td8 Tc7 51.Ta8+ Rb6 52.Tb8+ Ra6 53.Ta8+ Rb7 54.Te8 Txc2
55.Te7+ Rc8 56.Te8+ Rd7
  µ  (-0.74)   Profondeur: 12/23   00:00:01  603kN
48...Ra5 49.e6 dxe6 50.f4 a3 51.Td8 axb2 52.Td1 Rb6 53.Ta1 bxa1D+ 54.Rf2 Rc5
  ³  (-0.60)   Profondeur: 13/21   00:00:01  888kN
48...Ra5 49.Td8 a3 50.bxa3 bxa3 51.e6 dxe6 52.Td6 a2 53.Td1 Rb4 54.Tb1+ axb1D+
55.Rg2 Dxc2
  µ  (-0.83)   Profondeur: 14/30   00:00:02  1612kN
48...Ra5 49.e6 dxe6 50.Td8 Tc7 51.Td2 a3 52.b3 a2 53.Td1 Txc2 54.h4 Tb2 55.h5
Tb1 56.Txb1
  ³  (-0.58)   Profondeur: 15/32   00:00:03  2323kN
48...Ra5 49.e6 dxe6 50.Td8 Tc7 51.Td2 a3 52.b3 a2 53.Td1 Txc2 54.h4 Tb2 55.g4
Tb1 56.Txb1
  =  (-0.08)   Profondeur: 15/32   00:00:04  2376kN
48...Ra5 49.e6 dxe6 50.b3 a3 51.Td8 Rb6 52.Td1 Tc7 53.h4 Txc2 54.g4 Tc1 55.Txc1
  ²  (0.44)   Profondeur: 15/32   00:00:04  2553kN
48...Rc6 49.e6 dxe6 50.Tc8+ Rd5 51.h4 a3 52.Td8+ Re5 53.bxa3 bxa3 54.f4+ Re4
55.Td1
  ²  (0.43)   Profondeur: 15/33   00:00:07  4501kN
48...Rc6 49.e6 dxe6 50.Tc8+ Rd5 51.h4 a3 52.Td8+ Re5 53.bxa3 bxa3 54.f4+ Re4
55.Rg2
  =  (0.08)   Profondeur: 15/33   00:00:09  5715kN
48...Rc6 49.e6 dxe6 50.Td8 a3 51.bxa3 bxa3 52.Td1 Td7 53.Ta1 b4 54.h4 Td2 55.Ta2
Rd5
  =  (-0.24)   Profondeur: 15/33   00:00:13  7924kN
48...Rc6 49.Tc8+ Rd5 50.Rg2 a3 51.bxa3 bxa3 52.h4 a2 53.Tc3
  =  (-0.21)   Profondeur: 16/36   00:00:18  10636kN, tb=1
48...Rc6 49.Tc8+ Rd5 50.Tb8 a3 51.bxa3 bxa3 52.Txb5+ Rc4 53.Tb1 a2 54.Ta1 Rc3
55.f4 Rb2 56.Txa2+ Txa2 57.h4 Ta8 58.c4
  ³  (-0.28)   Profondeur: 17/37   00:00:24  13915kN, tb=1
48...Rc6 49.Tc8+ Rd5 50.Tb8 a3 51.bxa3 bxa3 52.Txb5+ Rc4 53.Tb1 a2 54.Ta1 Rc3
55.f4 Rb2 56.Td1 a1D 57.Rg2 Dxd1 58.f5 Rxc2
  ³  (-0.53)   Profondeur: 18/41   00:00:37  20289kN, tb=15
48...Rc6 49.Tc8+ Rd5 50.Tb8 a3 51.bxa3 bxa3 52.Txb5+ Rc4 53.Tb1 a2 54.Ta1 Rc3
55.f4 Rb2 56.Txa2+ Txa2 57.h4 Rxc2 58.g4 Ta8
  ³  (-0.55)   Profondeur: 18/41   00:00:45  24963kN, tb=49
48...Rc6 49.Tc8+ Rd5 50.Tb8 a3 51.bxa3 bxa3 52.Txb5+ Rc4 53.Tb1 a2 54.Ta1 Rc3
55.f4 Rb2 56.Txa2+ Txa2 57.h4 Rxc2 58.g4 Ta8 59.f5
  ³  (-0.53)   Profondeur: 19/44   00:00:59  31035kN, tb=83
48...Rc6 49.Tc8+ Rd5 50.Tb8 a3 51.bxa3 bxa3 52.Txb5+ Rc4 53.Tb1 a2 54.Ta1 Rc3
55.f4 Rb2 56.Txa2+ Txa2 57.h4 Rxc2 58.g4 Ta8 59.f5
  ³  (-0.63)   Profondeur: 20/46   00:01:42  51354kN, tb=237
48...Rc6 49.Tc8+ Rd5 50.Tb8 a3 51.bxa3 bxa3 52.Txb5+ Rc4 53.Tb1 a2 54.Ta1 Rc3
55.f4 Rb2 56.Txa2+ Txa2 57.h4 Rxc2 58.g4 Ta8 59.f5
  ³  (-0.58)   Profondeur: 21/48   00:02:36  75234kN, tb=672
48...Ra5 49.Rf1 a3 50.bxa3 bxa3 51.Txb5+ Rxb5 52.e6
  ³  (-0.59)   Profondeur: 21/48   00:03:01  86837kN, tb=702
48...Ra5 49.Rf1 a3 50.bxa3 bxa3 51.Txb5+ Rxb5 52.e6 dxe6 53.c4+ Rxc4 54.Re2
  µ  (-0.94)   Profondeur: 21/48   00:03:16  95096kN, tb=773
48...Ra5 49.e6 dxe6 50.Te8 a3 51.h4 axb2 52.Rg2 b1D 53.Txe6 Dxc2 54.Te5 Ra4
55.Te1 Ra3 56.Ta1+ Rb2 57.Rg1 Rxa1 58.Rh2
  -+  (-2.34)   Profondeur: 21/48   00:04:37  132098kN, tb=2394
48...Ra5 49.e6 dxe6 50.Te8 a3 51.h4 axb2 52.Rg2 b1D 53.Txe6 Dxc2 54.Te5 Ra4
55.Te1 Ra3 56.Ta1+ Rb2 57.Rg1 Rxa1 58.Rh2 Dxf2+ 59.Rh1 Dxg3
  -+  (-2.59)   Profondeur: 22/44   00:05:03  145460kN, tb=2522
48...Ra5 49.e6 dxe6 50.Te8 a3 51.h4 axb2 52.Rg2 b1D 53.Txe6 Dxc2 54.Te5 Ra4
55.Te1 Ra3 56.Ta1+ Rb2 57.Rg1 Rxa1 58.Rh2 Dxf2+ 59.Rh1 Dxg3
  -+  (-3.09)   Profondeur: 22/46   00:05:23  156606kN, tb=2593
48...Ra5 49.e6 dxe6 50.Td8 a3 51.b3 a2 52.Td1 Rb6 53.Ta1 Rc5 54.h4 Rd4 55.Rh2
Rc3 56.g4 Rb2 57.Te1 Rxc2 58.Tg1 Rxb3
  -+  (-3.42)   Profondeur: 22/48   00:06:44  187743kN, tb=5797

• Re: Crafty missed 48...Ka5 against Falcon [test position] Vincent Lejeune 23:32:22 07/12/04
  • Re: Crafty missed 48...Ka5 against Falcon [test position] Vincent Lejeune 00:40:26 07/13/04
• CM9_OffSet finds Ka5 in 37 seconds on a P3/850... Dan Ellwein 18:59:43 07/11/04
• Re: Crafty missed 48...Ka5 against Falcon [test position] David Dahlem 10:03:56 07/11/04
• Re: Crafty missed 48...Ka5 against Falcon [test position] CM10 Vincent Lejeune 10:01:26 07/11/04

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