how much time to see the draw?

[Uri Blass]

This position is from my last tournament game

[D]8/8/8/8/6p1/1pBk2Kp/1P6/3b4 b - - 0 76

I was black.
I wonder how much time does your program need to see the draw?

Note that some moves earlier one of my team member told me that I can offer a draw but I did not want to do it because I was not sure that it is a draw(I was only sure that I do not see a win) and I was not sure that there is no practical chance to win the game(I think that being almost sure that it is a draw is not a good reason to agree to a draw).

The time control was 90+30

I decided to accept the draw after one of the team members of my opponent told me that it is a draw and that if I continue he is going to stop the clocks and ask for a draw.

I thought that I may continue and get a win in case that he does it but I did not want to win a game because of a mistake that is not a mistake of my opponent but mistake of one of his team members espacially after what happened earlier when one of my team member told me that I can offer a draw(note that in a game without increasement it may be possible to claim a draw in case that the opponent does not try to win by normal means but not with increasement).

Analyzing the position after the game I think that black had practical chances to win.

Black can hope that white is going to blunder in a line like the following

76...Kc4 77.Kf2? because white may believe that 77...h2 lose the pawn after 78.Kg2 g3 79.Be5 when white can miss 79....Bf3+ in the time that he plays 77.Kf2

I did not see the idea of Bf3+ during the game and I am not sure if my opponent saw it and he may be lucky not to put his king at f2 in previous moves.

Uri

[PauloSoare]

This position is from my last tournament game

[D]8/8/8/8/6p1/1pBk2Kp/1P6/3b4 b - - 0 76

I was black.
I wonder how much time does your program need to see the draw?

Note that some moves earlier one of my team member told me that I can offer a draw but I did not want to do it because I was not sure that it is a draw(I was only sure that I do not see a win) and I was not sure that there is no practical chance to win the game(I think that being almost sure that it is a draw is not a good reason to agree to a draw).

The time control was 90+30

I decided to accept the draw after one of the team members of my opponent told me that it is a draw and that if I continue he is going to stop the clocks and ask for a draw.

I thought that I may continue and get a win in case that he does it but I did not want to win a game because of a mistake that is not a mistake of my opponent but mistake of one of his team members espacially after what happened earlier when one of my team member told me that I can offer a draw(note that in a game without increasement it may be possible to claim a draw in case that the opponent does not try to win by normal means but not with increasement).

Analyzing the position after the game I think that black had practical chances to win.

Black can hope that white is going to blunder in a line like the following

76...Kc4 77.Kf2? because white may believe that 77...h2 lose the pawn after 78.Kg2 g3 79.Be5 when white can miss 79....Bf3+ in the time that he plays 77.Kf2

I did not see the idea of Bf3+ during the game and I am not sure if my opponent saw it and he may be lucky not to put his king at f2 in previous moves.

Uri

Very dificult, Uri, look the diference in time between depths 27 and 28
of Deep Fritz 10.

Deep Shredder 10 with 3/4/5 shredderbases


20/20 0:01 -2.82++ 1...Ke4 (2.245.954) 1731 SB:8.882
20/21 0:01 -2.83 1...Ke4 2.Bd2 Kd5 3.Bb4 Bc2 4.Be7 Bf5 5.Bf8 Bd3 6.Be7 Bf5 7.Bf8 Bd3 8.Be7 Bf5 (2.721.702) 1759 SB:9.757
21/22 0:03 -2.84 1...Ke4 2.Ba5 Kd5 3.Bc7 Bf3 4.Bb8 Be2 (5.746.891) 1905 SB:13.562
22/25 0:03 -2.84 1...Ke4 2.Ba5 Kd5 3.Bc7 Be2 (6.778.113) 1919 SB:16.342
22/25 0:03 -2.85++ 1...Bf3 (7.397.720) 1916 SB:19.160
22/25 0:06 -2.85 1...Bf3 2.Be5 Kc2 3.Bf6 (12.690.917) 1990 SB:27.740
23/24 0:06 -2.84 1...Bf3 2.Be5 Kc2 3.Bf6 Be4 4.Bc3 Bf5 (13.443.905) 1991 SB:31.254
24/26 0:07 -2.85 1...Bf3 2.Be5 Kc2 3.Bf6 Be4 4.Be5 Bf5 5.Bc3 Be6 (15.404.502) 1991 SB:38.492
24/26 0:09 -2.86++ 1...Be2 (19.694.201) 1991 SB:50.140
24/27 0:19 -2.89 1...Be2 2.Ba5 Kc2 (40.057.964) 2097 SB:65.489
24/27 0:20 -2.90++ 1...Kc2 (43.528.450) 2099 SB:74.521
24/27 0:24 -2.94 1...Kc2 2.Bf6 Kc1 3.Bg7 Bf3 4.Bf6 Bd5 5.Be5 Be6 (52.928.451) 2119 SB:84.515
25/27 0:26 -2.95 1...Kc2 2.Bf6 Kc1 3.Bg7 Bf3 4.Bf6 Bd5 5.Be5 Be6 6.Kh2 Kd2 (56.025.716) 2122 SB:89.266
26/28 0:32 -2.95 1...Kc2 2.Be5 Kc1 3.Bg7 Bf3 4.Bf6 Bd5 5.Be5 Be6 6.Kh2 Kd2 7.Bf4+ Kd3 8.Bd6 Ke4 9.Kg3 (69.431.676) 2136 SB:109.396
27/29 0:51 -2.95 1...Kc2 2.Bh8 Kc1 3.Bd4 Bf3 4.Bc3 Bd5 5.Be5 Be6 6.Kh2 Kd2 7.Bf4+ Kd3 8.Bd6 Ke2 9.Kg3 (110.191.176) 2153 SB:172.129
28/29 1:04 -2.96 1...Kc2 2.Bh8 Kc1 3.Bd4 Kb1 4.Kh2 Bf3 5.Be5 Be2 (139.947.058) 2162 SB:207.820
29/30 1:10 -2.96 1...Kc2 2.Bh8 Kc1 3.Bd4 Kb1 4.Kh2 Bf3 5.Be5 Be2 6.Kg3 Bf3 7.Kh2 Be2 8.Kg3 Bf3 9.Kh2 (153.122.139) 2170 SB:229.445
30/32 2:08 -2.99 1...Kc2 2.Bh8 Bf3 3.Bc3 (283.852.141) 2216 SB:337.679
30/32 2:29 -3.00++ 1...Be2 (331.697.051) 2219 SB:385.052
30/32 3:27 -3.02 1...Be2 2.Bh8 Ke4 3.Bg7 Ba6 4.Bf8 Bc8 5.Bg7 Kd3 6.Kh2 Bf5 7.Kg3 (464.163.582) 2236 SB:455.614
31/34 5:25 -3.03 1...Be2 2.Bh8 Ke4 3.Bc3 Ba6 4.Bf6 Kd3 5.Bg7 Bb7 6.Bf6 (730.443.694) 2242 SB:572.348
31/34 6:27 -3.04++ 1...Kc2 (868.632.561) 2242 SB:648.748
31/34 13:11 -3.07 1...Kc2 2.Bh8 Bf3 3.Bc3 Be4 4.Be5 Bf5 5.Bd4 Be6 (1.782.007.155) 2250 SB:729.068
________________________________________________________________________________
Deep Fritz 10

New game
8/8/8/8/6p1/1pBk2Kp/1P6/3b4 b - - 0 1

Analysis by Deep Fritz 10:

1...Bf3 2.Bb4 Ke2 3.Bc5 Kf1 4.Bd4 Be4 5.Bc5 Bf5
µ (-1.37) Depth: 9/13 00:00:00 9kN
1...Bf3 2.Bb4 Ke2 3.Bc5 Kf1 4.Bd4 Be4 5.Bc5 Bf5 6.Bd4
µ (-1.37) Depth: 10/13 00:00:00 15kN
1...Bf3 2.Bb4 Ke2 3.Bc5 Kf1 4.Bd4 Be4 5.Bc5 Bd5 6.Bd4 Bf3
µ (-1.37) Depth: 11/15 00:00:00 26kN
1...Bf3 2.Bb4 Ke2 3.Bc5 Kf1 4.Bd4 Be4 5.Bc5 Bd5 6.Bd4 Bf3
µ (-1.37) Depth: 12/15 00:00:00 48kN
1...Bf3 2.Bb4 Ke2 3.Bc5 Kf1 4.Bd4 Be4 5.Bc5 Bd5 6.Bd4 Bf3
µ (-1.37) Depth: 13/17 00:00:00 86kN
1...Bf3 2.Bb4 Ke2 3.Bc5 Kf1 4.Bd4 Be4 5.Bc5 Bd5 6.Bd4 Bf3 7.Kh2
µ (-1.37) Depth: 14/17 00:00:00 157kN
1...Bf3 2.Bb4 Ke2 3.Bc5 Kf1 4.Bd4 Be4 5.Bc5 Bd5 6.Bd4 Bh1 7.Kxg4 Kg2 8.Kf4 h2
µ (-1.38) Depth: 15/21 00:00:00 294kN
1...Bf3 2.Bb4 Ke2 3.Bc5 Kf1 4.Bd4 Be4 5.Bc5 Bd5 6.Bd4 Bg2
µ (-1.39) Depth: 16/20 00:00:00 550kN
1...Bf3 2.Bb4 Ke2 3.Bc5 Kf1 4.Bd4 Be4 5.Bc5 Bd5 6.Bd4 Bg2 7.Kxg4 h2
µ (-1.39) Depth: 17/21 00:00:00 891kN
1...Bf3 2.Bb4 Ke2 3.Bc5 Kf1 4.Bd4 Be4 5.Bc5 Bd5 6.Bd4 Bg2
µ (-1.37) Depth: 18/21 00:00:02 1646kN
1...Bf3 2.Bb4 Ke2 3.Bc5 Kf1 4.Bd4 Be4 5.Bc5 Bd5 6.Bd4 Bg2 7.Kxg4 h2
µ (-1.37) Depth: 19/25 00:00:02 3219kN
1...Bf3 2.Bb4 Ke2 3.Bc5 Kf1 4.Bd4 Be4 5.Bc5 Bd5 6.Bd4 Be6 7.Bc5 Bf5
µ (-1.37) Depth: 20/27 00:00:02 5404kN
1...Bf3 2.Bb4 Ke2 3.Bc5 Kf1 4.Bd4 Be4 5.Bc5 Bd5 6.Bd4 Be6 7.Bc5 Bf5
µ (-1.37) Depth: 21/28 00:00:04 9920kN
1...Bf3 2.Bb4 Ke2 3.Bc5 Kf1 4.Bd4 Be4 5.Bc5 Bd5 6.Bd4 Be6 7.Bc5 Bf7 8.Kxg4 h2
µ (-1.37) Depth: 22/28 00:00:07 18055kN
1...Bf3 2.Bb4 Ke2 3.Bc5 Kf1 4.Bd4 Be4 5.Bc5 Bd5 6.Bd4 Be6 7.Bc5 Bf7 8.Bd4
µ (-1.37) Depth: 23/33 00:00:13 35270kN
1...Bf3 2.Bb4 Ke2 3.Bc5 Kf1 4.Bd4 Be4 5.Bc5 Bd5 6.Bd4 Be6 7.Bc5 Bf7 8.Bd4 Ke2 9.Kxg4 h2
µ (-1.36) Depth: 24/33 00:00:27 72205kN
1...Bf3 2.Bb4 Ke2 3.Bc5 Kf1 4.Bd4 Be4 5.Bc5 Bd5 6.Bd4 Be6 7.Bc5 Bf7 8.Kxg4 h2
µ (-1.36) Depth: 25/39 00:00:53 141mN
1...Be2
µ (-1.36) Depth: 25/39 00:01:08 181mN
1...Be2 2.Be5 Bf3 3.Bc3 Ke3 4.Be5 Ke2 5.Bg7 Ke3
µ (-1.37) Depth: 26/47 00:02:19 374mN
1...Be2 2.Be5 Bf3 3.Bc3 Ke3 4.Be5 Ke2 5.Bg7 Bc6
µ (-1.37) Depth: 27/46 00:04:52 782mN
1...Be2 2.Be5 Kd2 3.Bc3+ Kd1 4.Bg7 Bd3 5.Bf6 Ke1 6.Bc3+ Kf1 7.Bd4 Bf5 8.Be3 Bg6 9.Bd4 Be8 10.Be5
µ (-1.38) Depth: 28/65 00:43:51 6830mN
(Soares, Residencia 28.04.2007)

[nuff]

In opposite colored bishop endings one side can blockade on the squares of his Bishop and you cannot drive him out. He can simply move the Bishop while leaving the King as it is.

[PauloSoare]

In opposite colored bishop endings one side can blockade on the squares of his Bishop and you cannot drive him out. He can simply move the Bishop while leaving the King as it is.

Yes, this position show this, but there are some exceptions to this rule
in opposite colored bihops endings, unhaply I don´t remember
none now.

Paulo Soares