Author: Robert Hyatt
Date: 07:46:11 12/28/03
Go up one level in this thread
On December 28, 2003 at 04:46:07, martin fierz wrote:
>On December 27, 2003 at 00:51:11, Mike Byrne wrote:
>
>>
>>[d]8/r7/8/5bk1/8/5B2/5RPP/6K1 b - - 0 1
>
>for all programs that instantly saw the draw in mike's
>position, this may be interesting too (of course only
>without tablebases): white to move and win, a study by
>J. Vancura 1922, which is also on the chessbase site.
>
>[d]8/8/8/8/8/2K4B/5k1P/8 w - - 0 1
>
>the point is that although black's king is in the
>square of the white pawn, he can never get through
>to the h-file. programs which are too speculative about
>"wrong bishop => draw" might show a draw score before
>they see the win.
>
>cheers
> martin
Mine _never_ says draw in this position:
depth time score variation (1)
1 0.00 4.05 1. Bf5
1-> 0.02 4.05 1. Bf5
2 0.02 3.82 1. Bf5 Ke3
2-> 0.02 3.82 1. Bf5 Ke3
3 0.02 4.12 1. Bf5 Ke3 2. h4
3-> 0.02 4.12 1. Bf5 Ke3 2. h4
4 0.02 4.12 1. Bf5 Ke3 2. h4 Kf4
4-> 0.03 4.12 1. Bf5 Ke3 2. h4 Kf4
5 0.03 4.12 1. Bf5 Ke3 2. h4 Kf4 3. Be6
5 0.03 4.24 1. Bd7 Kf3 2. h4 Kf4 3. h5
5 0.03 4.39 1. Be6 Ke3 2. h4 Kf4 3. h5
5-> 0.03 4.39 1. Be6 Ke3 2. h4 Kf4 3. h5
6 0.03 4.39 1. Be6 Ke3 2. h4 Ke4 3. h5 Ke5
6-> 0.07 4.39 1. Be6 Ke3 2. h4 Ke4 3. h5 Ke5
7 0.07 ++ 1. Be6!!
7 0.09 5.16 1. Be6 Ke3 2. h4 Ke4 3. h5 Ke5 4. h6
7-> 0.13 5.16 1. Be6 Ke3 2. h4 Ke4 3. h5 Ke5 4. h6
8 0.15 5.26 1. Be6 Ke3 2. h4 Ke4 3. h5 Ke5 4. h6
Kf6
8-> 0.23 5.26 1. Be6 Ke3 2. h4 Ke4 3. h5 Ke5 4. h6
Kf6
9 0.27 5.46 1. Be6 Ke3 2. h4 Ke4 3. h5 Ke5 4. h6
Kf6 5. Kd4
9-> 0.42 5.46 1. Be6 Ke3 2. h4 Ke4 3. h5 Ke5 4. h6
Kf6 5. Kd4
10 0.48 5.56 1. Be6 Ke3 2. h4 Ke4 3. h5 Ke5 4. h6
Kf6 5. Bf5 Kf7
10 0.65 ++ 1. Bd7!!
10 0.67 10.46 1. Bd7 Ke3 2. h4 Ke4 3. h5 Ke5 4. h6
Kf6 5. Be8 Ke5
10-> 0.70 10.46 1. Bd7 Ke3 2. h4 Ke4 3. h5 Ke5 4. h6
Kf6 5. Be8 Ke5
11 0.84 10.21 1. Bd7 Ke3 2. h4 Ke4 3. h5 Ke5 4. h6
Kf6 5. Be8 Ke7 6. h7 Kxe8 7. h8=Q+
11-> 1.18 10.21 1. Bd7 Ke3 2. h4 Ke4 3. h5 Ke5 4. h6
Kf6 5. Be8 Ke7 6. h7 Kxe8 7. h8=Q+
12 1.36 10.21 1. Bd7 Ke3 2. h4 Ke4 3. h5 Ke5 4. h6
Kf6 5. Be8 Ke7 6. h7 Kxe8 7. h8=Q+
Kd7
12-> 1.84 10.21 1. Bd7 Ke3 2. h4 Ke4 3. h5 Ke5 4. h6
Kf6 5. Be8 Ke7 6. h7 Kxe8 7. h8=Q+
Kd7
Etc (with no endgame tables, othnerwise it is instant mate of course):
clearing hash tables
time surplus 0.00 time limit 1666:39 (1666:39)
depth time score variation (1)
1 0.00 3.92 1. Bd7
1-> 0.00 3.92 1. Bd7
2 0.00 ++ 1. Bd7!!
2 0.00 Mat14 1. Bd7 <EGTB>
2-> 0.00 Mat14 1. Bd7 <EGTB>
3 0.00 Mat14 1. Bd7 <EGTB>
3-> 0.00 Mat14 1. Bd7 <EGTB>
4 0.00 Mat14 1. Bd7 <EGTB>
4-> 0.00 Mat14 1. Bd7 <EGTB>
Of course in the first position it finds a draw instantly, whether it be
with egtbs or without...
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