Interesting endgame loss by Scorpio 1.6X3 in RWBC(R12)

[Guenther Simon]

Interesting loss by Scorpio 1.6X3 in the endgame after
a game with ups and downs.
It seems Scorpio tried too hard to win and walked away
too far from the connected passers.
AFAIK around move 63-67 the game outcome turned therefore
and 67...Bh5? looks like a blunder? (Diagram 2)

BTW F8 thinks(haven't checked others yet) that 39...Bc5!
instead of ...Kh7 gives good winning chances? (Diagram 1)

Regards,
Guenther

[diag]2b1r2k/4b3/pp2P2N/8/2R3B1/P2p2P1/1P5P/7K b - - 0 39[/diag]
2b1r2k/4b3/pp2P2N/8/2R3B1/P2p2P1/1P5P/7K b - - 0 39 [D1]

[diag]2R5/8/1p4P1/4b3/p6P/P3kb2/1P6/4K3 b - - 0 67[/diag]
2R5/8/1p4P1/4b3/p6P/P3kb2/1P6/4K3 b - - 0 67 [D2]

[Event "RWBC_Class_C_6th_Edition"]
[Site "ESPRESSO"]
[Date "2006.01.26"]
[Round "12"]
[Number "267"]
[White "Resp_019"]
[Black "Scorpio_16X3"]
[Result "1-0"]
[TimeControl "40/900"]
[Annotator "13. +0.29 12... -0.16"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 Bb7 5. a3 d5 6. Bg5 Be7 7. e3 O-O 8.
Rc1 Nbd7 9. cxd5 exd5 10. Bd3 c5 11. O-O Ne4 12. Bf4 f5 {-0.16/11} 13.
Nb5 {+0.29/11} c4 {-0.03/12} 14. Be2 {+0.27/11} g5 {+0.41/12} 15.
Be5 {+0.29/12} a6 {+0.63/12} 16. Nc3 {+0.10/13} Nxc3 {+0.54/12} 17.
Rxc3 {+0.09/14} g4 {+0.67/13} 18. Ne1 {+0.04/13} Nxe5 {+0.50/12} 19.
dxe5 {+0.02/12} Qc7 {+0.65/12} 20. f4 {+0.04/12} gxf3 {+0.83/13} 21.
Nxf3 {+0.01/12} f4 {+0.59/13} 22. Kh1 {+0.11/11} Bc5 {+0.09/12} 23.
exf4 {+0.33/11} Rxf4 {-0.62/13} 24. Ng5 {+0.37/11} Rxf1+ {-0.45/13} 25.
Qxf1 {+1.15/12} Rf8 {-0.71/13} 26. Qb1 {+1.28/12} Qe7 {-1.13/13} 27.
Rg3 {+1.41/12} Bf2 {-1.73/13} 28. Rh3 {+1.46/11} Bc8 {-1.23/13} 29.
e6 {+1.84/11} Rf4 {-1.47/12} 30. g3 {+1.84/11} Rf8 {-1.53/13} 31.
Qxh7+ {+1.88/12} Qxh7 32. Rxh7 {+1.91/13} Bc5 {-1.51/14} 33. Rc7 {+1.90/13}
Bd6 {-1.50/14} 34. Rc6 {+1.85/13} Be7 {-1.38/14} 35. Nf7 {+1.92/12}
d4 {-0.73/13} 36. Rc7 {+1.51/11} d3 {-0.25/14} 37. Bg4 {+0.89/12}
Re8 {-0.30/13} 38. Nh6+ {+0.28/12} Kh8 {-0.28/14} 39. Rxc4 {+0.24/12}
[D1]Kh7 {-0.22/14} 40. Nf7 {+0.61/12} d2 {-0.25/14} 41. Rc7 {+0.74/13}
Kg8 {-0.44/14} 42. Rc2 {+0.80/14} Bb7+ {-0.52/15} 43. Kg1 {+0.88/15}
Bc5+ {-0.41/16} 44. Kf1 {+0.88/14} Rxe6 {+0.18/15} 45. Rxd2 {+0.89/14}
Kxf7 {+0.27/16} 46. Bxe6+ {+0.89/14} Kxe6 {+0.33/16} 47. h4 {+0.88/15}
a5 {+0.31/16} 48. g4 {+1.09/13} Bf3 {+0.39/16} 49. g5 {+1.07/14}
Kf5 {+0.56/15} 50. Rd7 {+1.07/14} Kg6 {+0.33/15} 51. Ke1 {+1.04/14}
Be4 {+0.32/15} 52. Ke2 {+0.45/15} a4 {+0.48/16} 53. Ra7 {+1.03/14}
Bc6 {+0.38/16} 54. Rc7 {+0.81/15} Be8 {+0.26/16} 55. Kf3 {+1.02/14}
Kf5 {+0.46/17} 56. Rc8 {+0.37/15} Bh5+ {+0.77/17} 57. Kg3 {+0.29/15}
Bd6+ {+0.83/18} 58. Kh3 {+0.28/15} Be5 {+0.93/16} 59. Rc2 {+0.11/15}
Kf4 {+0.92/16} 60. Rf2+ {+0.00/15} Ke3 {+0.81/17} 61. Kg2 {+0.00/16}
Ke4 {+0.77/16} 62. Kf1 {+0.00/15} Bf3 {+0.78/16} 63. g6 {+0.04/14}
Bg7 {+0.65/16} 64. Rd2 {+0.48/15} Bd4 {+0.61/16} 65. Ke1 {+0.39/15}
Ke3 {+0.25/17} 66. Rc2 {+0.39/15} Be5 {+0.47/16} 67. Rc8 {+0.42/14}
[D2]Bh5 {+0.00/15} 68. Rg8 {+1.48/14} Bxb2 {-0.50/17} 69. g7 {+1.53/16}
Bc3+ {-0.50/18} 70. Kf1 {+1.54/16} Be2+ {-1.28/18} 71. Kg2 {+1.79/16}
Bf3+ {-1.48/18} 72. Kh3 {+1.93/16} Kf2 {-1.36/17} 73. h5 {+2.13/15}
Bg2+ {-1.36/16} 74. Kg4 {+2.35/15} Bf3+ {-1.38/16} 75. Kg5 {+2.36/15}
Kg2 {-1.96/16} 76. Kh6 {+2.72/15} Bd2+ {-3.18/16} 77. Kh7 {+3.23/14}
Be4+ {-3.28/15} 78. Kh8 {+3.22/14} Bc3 {-3.79/15} 79. h6 {+3.66/13}
Bd5 {-4.22/14} 80. Re8 {+3.99/13} b5 {-4.98/14} 81. Kh7 {+4.55/13}
Kf3 {-10.87/17} 82. g8=Q {+5.96/15} Bxg8+ {-16.87/16} 83. Kxg8 {+6.19/18}
b4 {-20.32/14} 84. axb4 {+7.31/15} a3 {-20.82/14} 85. Ra8 {+6.85/13}
Ke4 {-22.82/13} 86. h7 {+7.75/13} Kd5 {-59.40/12} 87. Rxa3 {+9.56/14}
Bd4 {-59.30/16} 88. Rd3 {+11.76/13} Ke4 {-59.30/15} 89. Rxd4+ {+19.39/14}
Kxd4 {-59.30/70}
{Xboard adjudication} 1-0

[Richard Pijl]

BTW F8 thinks(haven't checked others yet) that 39...Bc5!
instead of ...Kh7 gives good winning chances? (Diagram 1)

Baron 1.7.1b7 also thinks Bc5 is best. It is not sure about the winning chances though:

Code: Select all

   8(18)&   0:07.44   1878949   +0.12  d3-d2 Rc4-c2 Kh8-h7 Nh6-f5 Be7-c5
                                      Kh1-g2 Re8-g8 Rc2xd2 Rg8xg4
  8(18)&   0:09.73   2501284   +0.64  Be7-c5 Nh6-f7 Kh8-g8 Rc4xc5 Bc8-b7
                                      Kh1-g1 b6xc5 Nf7-e5 Bb7-e4 Ne5-d7 (Kg8-g7)

  8(18).   0:10.22   2630781   +0.64  Be7-c5 Nh6-f7 Kh8-g8 Rc4xc5 Bc8-b7
                                      Kh1-g1 b6xc5 Nf7-e5 Bb7-e4 Ne5-d7 (Kg8-g7)

  9(17)&   0:13.06   3455888   +0.64  Be7-c5 Nh6-f7 Kh8-g8 Rc4xc5 Bc8-b7
                                      Kh1-g1 b6xc5 Nf7-e5 Bb7-e4 Ne5-d7 (Kg8-g7)

  9(17).   0:20.48   5359294   +0.64  Be7-c5 Nh6-f7 Kh8-g8 Rc4xc5 Bc8-b7
                                      Kh1-g1 b6xc5 Nf7-e5 Bb7-e4 Ne5-d7 (Kg8-g7)

 10(21)+   0:28.89   7814101   +0.99  Be7-c5 (Nh6-f7) (Kh8-g7) (Rc4xc5) (b6xc5)
                                      (Nf7-d6) (Re8-h8)
 10(21)&   0:39.19  10871085   +1.35  Be7-c5 Kh1-g2 Bc8xe6 Rc4-c3 Be6xg4
                                      Nh6xg4 Re8-e4 h2-h3 d3-d2 Rc3-d3 Re4-d4
 10(21).   0:55.67  15201045   +1.35  Be7-c5 Kh1-g2 Bc8xe6 Rc4-c3 Be6xg4
                                      Nh6xg4 Re8-e4 h2-h3 d3-d2 Rc3-d3 Re4-d4
 11(20)&   1:08.08  18837626   +1.35  Be7-c5 Kh1-g2 Bc8xe6 Rc4-c3 Be6xg4
                                      Nh6xg4 Re8-e4 h2-h3 d3-d2 Rc3-d3 Re4-d4
                                      Rd3xd4 (Bc5xd4)
 11(20).   1:41.23  27845014   +1.35  Be7-c5 Kh1-g2 Bc8xe6 Rc4-c3 Be6xg4
                                      Nh6xg4 Re8-e4 h2-h3 d3-d2 Rc3-d3 Re4-d4
                                      Rd3xd4
 12(26)-   4:54.76  80588338   +1.00  Be7-c5 (Kh1-g2) (Bc8xe6) (Rc4-c3) (Be6xg4)

                                      (Nh6xg4) (Re8-e4) (Kg2-f3) (d3-d2) (Rc3-d3)
 12(26)&   5:37.78  92315380   +0.78  Be7-c5 Kh1-g2 Bc8xe6 Rc4-c3 Be6xg4
                                      Nh6xg4 Re8-d8 Rc3-c1 Bc5-d4 Rc1-b1 d3-d2
                                      Ng4-h6 Kh8-g7 (Nh6-f5)
 12(26).   6:31.43 107203194   +0.78  Be7-c5 Kh1-g2 Bc8xe6 Rc4-c3 Be6xg4
                                      Nh6xg4 Re8-d8 Rc3-c1 Bc5-d4 Rc1-b1 d3-d2
                                      Ng4-h6 Kh8-g7 (Nh6-f5)
 13(29)&   8:01.43 132452095   +0.95  Be7-c5 Kh1-g2 Bc8xe6 Rc4-c3 Be6-d5
                                      Kg2-h3 Kh8-g7 Nh6-f5 Kg7-f6 b2-b4 Bc5-e7
                                      Rc3xd3 Bd5-e4 Rd3-d6 (Be7xd6)
 13(29).  13:26.35 217120135   +0.95  Be7-c5 Kh1-g2 Bc8xe6 Rc4-c3 Be6-d5
                                      Kg2-h3 Kh8-g7 Nh6-f5 Kg7-f6 b2-b4 Bc5-e7
                                      Rc3xd3 Bd5-e4 Rd3-d6
 14(26)&  17:03.56 277525733   +0.88  Be7-c5 Kh1-g2 Bc8xe6 Rc4-c3 Be6xg4
                                      Nh6xg4 Re8-d8 Rc3-c1 Bc5-d4 b2-b4 Bd4-b2
                                      Rc1-d1 d3-d2 a3-a4

The second position seems to be a draw after Bxb2:

Code: Select all

  9(17)&   0:08.86   3337872   +0.00  Bf3-h5 Rc8-g8 Be5xb2 g6-g7 Bb2-c3
                                      Ke1-f1 Bh5-e2 Kf1-g2 Be2-f3 Kg2-f1 Bf3-e2
<rep>
  9(17)&   0:09.53   3579910   +0.14  Be5xb2 Rc8-e8 Ke3-d3 Re8-d8 Kd3-c4
                                      Rd8-d7 Bf3-e4 g6-g7 Be4-h7 h4-h5 Bb2xa3
                                      (Rd7-d8)
  9(17).   0:11.72   4485953   +0.14  Be5xb2 Rc8-e8 Ke3-d3 Re8-d8 Kd3-c4
                                      Rd8-d7 Bf3-e4 g6-g7 Be4-h7 h4-h5 Bb2xa3
                                      (Rd7-d8)
 10(19)&   0:16.77   6458057   -0.13  Be5xb2 Rc8-c7 Bb2-f6 Ke1-f1 Bf3-d5
                                      h4-h5 Bf6-g5 Rc7-a7 b6-b5 (Ra7-h7)
 10(19).   0:25.47  10071094   -0.13  Be5xb2 Rc8-c7 Bb2-f6 Ke1-f1 Bf3-d5
                                      h4-h5 Bf6-g5 Rc7-a7 b6-b5 (Ra7-h7)
 11(20)&   0:36.14  14172890   +0.00  Be5xb2 Rc8-e8 Ke3-d3 Re8-e7 Bf3-d5
                                      g6-g7 Kd3-c4 Re7-d7 Bd5-e6 Rd7-e7 Be6-d5 <
rep>
 11(20).   0:43.23  17187098   +0.00  Be5xb2 Rc8-e8 Ke3-d3 Re8-e7 Bf3-d5
                                      g6-g7 Kd3-c4 Re7-d7 Bd5-e6 Rd7-e7 Be6-d5 <
rep>
 12(21)&   1:00.59  23817689   +0.00  Be5xb2 Rc8-e8 Ke3-f4 Re8-f8 Kf4-e3
                                      Rf8-e8 <rep>
 12(21).   1:15.56  29948530   +0.00  Be5xb2 Rc8-e8 Ke3-f4 Re8-f8 Kf4-e3
                                      Rf8-e8 <rep>
 13(25)&   1:34.12  37138737   +0.00  Be5xb2 Rc8-e8 Ke3-f4 Re8-f8 Kf4-e3
                                      Rf8-e8 <rep>
 13(25).   1:59.76  48117855   +0.00  Be5xb2 Rc8-e8 Ke3-f4 Re8-f8 Kf4-e3
                                      Rf8-e8 <rep>
 14(29)&   2:34.95  61529920   +0.00  Be5xb2 Rc8-e8 Ke3-f4 Re8-f8 Kf4-e3
                                      Rf8-e8 <rep>
 14(29).   3:22.67  81533919   +0.00  Be5xb2 Rc8-e8 Ke3-f4 Re8-f8 Kf4-e3
                                      Rf8-e8 <rep>
 15(28)&   4:42.92 111876927   +0.00  Be5xb2 Rc8-e8 Ke3-f4 Re8-f8 Kf4-e3
                                      Rf8-e8 <rep>

Richard.