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Subject: To NON-believers in EGTB benefits... (a better example)

Author: Mike Hood

Date: 23:38:09 11/20/05

The following position is a better example of the usefulness of endgame
tablebases. The only winning move for White is Rg6. I allowed Fruit 2.1 (without
tablebases) 10 minutes for a search.

[D] 8/8/R7/8/8/1k1P4/6b1/K7 w - - 0 1

Analysis by Fruit 2.1:

2.Kb1
  +-  (2.66)   Depth: 1/1   00:00:00
2.Kb1 Bd5
  +-  (2.44)   Depth: 2/6   00:00:00
2.Kb1 Kc3 3.Rg6
  +-  (2.54)   Depth: 3/8   00:00:00
2.Kb1 Kc3 3.Ra3+ Kd4 4.Kc2
  +-  (2.47)   Depth: 4/9   00:00:00
2.Kb1 Kc3 3.Rd6 Bf1 4.d4 Bd3+ 5.Kc1
  +-  (2.33)   Depth: 5/10   00:00:01
2.Rg6 Bf3 3.Rf6 Bd5 4.Kb1
  +-  (2.45)   Depth: 5/10   00:00:01
2.Rg6 Bf3 3.Rf6 Bd5 4.Rf5 Bc6
  +-  (2.28)   Depth: 6/10   00:00:01  5kN
2.Rg6 Bh1 3.Rg3 Bc6 4.Kb1 Kc3 5.Kc1
  +-  (2.35)   Depth: 7/12   00:00:01  17kN
2.Rg6 Bf1 3.d4 Kc4 4.Rg4 Bh3 5.Rg3 Bf5
  +-  (2.18)   Depth: 8/14   00:00:02  34kN
2.Kb1 Bf1 3.Rd6 Kc3 4.d4 Be2 5.d5 Kd4
  +-  (2.33)   Depth: 8/14   00:00:02  36kN
2.Ra2 Bf3 3.Kb1 Kc3 4.Ra3+ Kd4 5.Kc2 Bd5 6.Ra4+ Ke5 7.d4+ Kf5
  +-  (2.37)   Depth: 8/14   00:00:02  52kN
2.Ra2 Bf1 3.d4 Bc4 4.Rh2 Kc3 5.Rh4 Bd5 6.Kb1
  +-  (2.25)   Depth: 9/14   00:00:02  73kN
2.Kb1 Bf1 3.Rd6 Kc3 4.d4 Bd3+ 5.Kc1 Kc4 6.Kd2 Be4
  +-  (2.30)   Depth: 9/16   00:00:02  82kN
2.Rg6 Bh1 3.Rh6 Bg2 4.Kb1 Kc3 5.Rd6 Bf1 6.d4 Bd3+ 7.Kc1
  +-  (2.33)   Depth: 9/16   00:00:03  117kN
2.Rg6 Bh1 3.Rg1 Bf3 4.Rc1 Be2 5.d4 Bf3 6.Rc5 Be4
  +-  (2.32)   Depth: 10/17   00:00:03  140kN
2.Rg6 Bh1 3.Rg1 Bf3 4.Rc1 Be2 5.d4 Bc4 6.Rd1 Bd5 7.Re1
  +-  (2.34)   Depth: 11/19   00:00:03  241kN
2.Ra5 Kc3 3.Ra3+ Kd4 4.Kb2 Bd5 5.Kc2 Ke5 6.Ra4 Kf5 7.Kc3 Ke5 8.d4+ Kf5
  +-  (2.45)   Depth: 11/19   00:00:03  283kN
2.Ra5 Kc3 3.Ra3+ Kd4 4.Kb2 Bd5 5.Kc2 Ke5 6.Ra4 Kf5 7.Kd2 Ke5 8.Ke3
  +-  (2.49)   Depth: 12/19   00:00:04  330kN
2.Ra5 Kb4 3.Rg5 Bf1 4.d4 Kc4 5.Rg4 Be2 6.Rf4 Kd5 7.Kb2 Bd3 8.Kc3
  +-  (2.52)   Depth: 13/20   00:00:04  461kN
2.Ra5 Kb4 3.Rg5 Bf1 4.d4 Kc4 5.Rg4 Bh3 6.Rf4 Bg2 7.Kb2 Bd5 8.Kc2 Kb5
  +-  (2.50)   Depth: 14/22   00:00:06  603kN
2.Ra5 Kb4 3.Rg5 Bf1 4.d4 Kc4 5.Rg4 Bh3 6.Rf4 Be6 7.Kb2 Kd3 8.Rf6 Bd5 9.Rf4
  +-  (2.39)   Depth: 15/22   00:00:07  809kN
2.Ra7 Kc3 3.Ra3+ Kd4 4.Kb2 Bd5 5.Kc2 Bc6 6.Ra7 Bd5 7.Kd2 Bc6 8.Rh7 Bd5 9.Rh4+
Kc5 10.Ke3
  +-  (2.57)   Depth: 15/23   00:00:08  1610kN
2.Ra7 Kc3 3.Ra3+ Kd4 4.Kb2 Bd5 5.Kc2 Bc6 6.Ra7 Bd5 7.Kd2 Bc6 8.Rh7 Bd5 9.Rh4+
Kc5 10.d4+ Kd6 11.Rh7
  +-  (2.64)   Depth: 16/25   00:00:09  1998kN
2.Ra7 Kc3 3.Ra3+ Kd4 4.Kb2 Bd5 5.Kc2 Bc6 6.Ra7 Bb5 7.Kd2 Bc6 8.Rh7 Bd5 9.Rh4+
Kc5 10.d4+ Kc4 11.Ke3 Kb5
  +-  (2.65)   Depth: 17/26   00:00:10  2579kN
2.Ra7 Kc3 3.Ra3+ Kd4 4.Kb2 Bd5 5.Kc2 Bc6 6.Ra7 Bd5 7.Ra4+ Ke5 8.d4+ Ke4 9.Kc3
Kf4 10.Ra5 Ke4 11.Ra1 Kf4 12.Kd3
  +-  (2.73)   Depth: 18/27   00:00:12  3792kN
2.Ra7 Kc3 3.Ra3+ Kd4 4.Kb2 Bf1 5.Kc2 Ke3 6.Rc3 Be2 7.Rb3 Bf1 8.Ra3 Be2 9.Rc3 Bh5
10.Rc6 Bf3 11.Re6+ Kd4 12.Kd2
  +-  (2.59)   Depth: 19/28   00:00:13  4815kN
2.Kb1 Bh1 3.Ra5 Kc3 4.Ra3+ Kd4 5.Kb2 Bg2 6.Kc2 Bd5 7.Ra4+ Ke5 8.d4+ Ke4 9.Kc3
Kf4 10.Ra5 Ke4 11.Ra1 Ke3 12.Re1+ Kf4 13.Kd3
  +-  (2.74)   Depth: 19/29   00:00:16  7614kN
2.Kb1 Kc3 3.Ra3+ Kd4 4.Kc2 Bc6 5.Ra7 Bb5 6.Kd2 Bc6 7.Rh7 Bd5 8.Rh4+ Kc5 9.d4+
Kd6 10.Ke3 Ke6 11.Rh6+ Kf5 12.Rd6 Bc4 13.Rc6 Bd5
  +-  (2.83)   Depth: 21/31   00:00:21  13110kN
2.Kb1 Kc3 3.Ra3+ Kd4 4.Kc2 Bc6 5.Ra6 Bb5 6.Rd6+ Ke5 7.Rb6 Bd7 8.d4+ Kd5 9.Kd3
Bc6 10.Kc3 Bd7 11.Rh6 Be6 12.Kd3 Kd6 13.Ke4 Ke7
  +-  (2.95)   Depth: 21/32   00:00:26  16276kN
2.Kb1 Kc3 3.Ra3+ Kd4 4.Kc2 Bc6 5.Ra6 Bb5 6.Rd6+ Ke5 7.Rb6 Be8 8.Kc3 Kd5 9.Ra6
Bd7 10.d4 Bc6 11.Ra1 Kd6 12.Ra3 Bd7 13.Ra6+ Kd5 14.Ra5+ Kd6
  +-  (2.95)   Depth: 22/33   00:00:31  18515kN
2.Kb1 Kc3 3.Ra3+ Kd4 4.Kc2 Bc6 5.Ra6 Bb5 6.Rd6+ Ke5 7.Rh6 Be8 8.Kc3 Bf7 9.d4+
Kd5 10.Kd3 Bg6+ 11.Ke3 Be8 12.Rh8 Bc6 13.Rh5+ Kd6 14.Rh6+ Kc7 15.Kf4 Bd5 16.Ke5
  +-  (2.98)   Depth: 23/38   00:00:48  27585kN
2.Kb1 Kc3 3.Ra3+ Kd4 4.Kc2 Bc6 5.Ra6 Bb5 6.Rd6+ Kc5 7.Rh6 Bc6 8.d4+ Kd5 9.Kd3
Bb5+ 10.Ke3 Bc6 11.Rg6 Bb7 12.Rf6 Bc8 13.Rf8 Bd7 14.Rh8 Be6 15.Rh5+ Kd6 16.Ke4
  +-  (3.00)   Depth: 24/38   00:01:14  42129kN
2.Kb1 Kc3 3.Ra3+ Kd4 4.Kc2 Bc6 5.Ra6 Bb5 6.Rd6+ Kc5 7.Rh6 Bc6 8.d4+ Kd5 9.Kd3
Bb5+ 10.Kc3 Bf1 11.Rh5+ Kd6 12.Rh2 Kd5 13.Rh6 Be2 14.Kd2 Bg4 15.Ke3 Be6 16.Rh5+
Kd6 17.Ke4
  +-  (3.00)   Depth: 25/38   00:01:22  50670kN
2.Kb1 Kc3 3.Ra3+ Kd4 4.Kc2 Bc6 5.Ra6 Bb5 6.Rd6+ Kc5 7.Rh6 Bc6 8.d4+ Kd5 9.Kd3
Bb5+ 10.Kc3 Bf1 11.Rh5+ Kd6 12.Rh2 Kd5 13.Rh6 Be2 14.Kd2 Bc4 15.Ke3 Bb3 16.Rh5+
Kd6 17.Ke4 Be6
  +-  (3.00)   Depth: 26/38   00:01:32  56342kN
2.Kb1 Kc3 3.Ra3+ Kd4 4.Kc2 Bc6 5.Ra6 Bb5 6.Rd6+ Kc5 7.Rh6 Bc6 8.d4+ Kd5 9.Kd3
Bb5+ 10.Kc3 Be8 11.Ra6 Bc6 12.Ra5+ Kd6 13.Kb4 Bg2 14.Ra6+ Kd5 15.Kc3 Bf3 16.Kd3
Be4+ 17.Ke3 Bf5
  +-  (3.00)   Depth: 27/40   00:01:50  71076kN
2.Kb1 Bf1 3.Rd6 Kc3 4.d4 Bd3+ 5.Kc1 Be4 6.Rd8 Bg2 7.d5 Kd4 8.d6 Bc6 9.Kd2 Kc5
10.Ke3 Kd5 11.Kd3 Kc5 12.Kd2 Kd5 13.Kc3 Kc5 14.Kb2 Kd5 15.Kb3 Ke6 16.Kc4
  +-  (3.03)   Depth: 28/42   00:06:29  236293kN
2.Kb1 Bf1 3.Rd6 Kc3 4.d4 Bd3+ 5.Kc1 Be4 6.Rd8 Bg2 7.d5 Kd4 8.d6 Bc6 9.Kd2 Kd5
10.Kc3 Kc5 11.Kb2 Bb5 12.Kc2 Bc6 13.Kc3 Bd5 14.Kd3 Bc6 15.Ke3 Kd5 16.Kf4 Ke6
  +-  (3.03)   Depth: 29/42   00:07:09  258960kN

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