Author: Mike Byrne
Date: 15:59:10 09/20/02
Go up one level in this thread
On September 20, 2002 at 13:30:09, Gian-Carlo Pascutto wrote:
>[D]4b3/6p1/5p1p/5P1P/3kPK2/1p6/1P2B3/8 b - - 0 1
>
>My engine just managed to lose what looked like a dead-drawn
>endgame against a Crafty clone on ICC. I couldn't understand
>what happened. I still don't know exactly, but it looks like
>some kind of hashing/draw-by-rep/nullmove artifact ;)
>
>But my program doesn't seem to be the only one that
>gets funny on this position:
>
<snip>
is this correct?
Crafty v17.16 SE (2 cpus)
White(1): 4b3/6p1/5p1p/5P1P/3kPK2/1p6/1P2B3/8 b - - 0 1
Black(1): go
end-game phase
clearing hash tables
time surplus 0.00 time limit 100:00 (100:00)
nss depth time score variation (1)
starting thread 1
3 0.00 -0.11 1. ... Bc6 2. Bd1 Kc4 3. Be2+
3 0.00 0.03 3 0.00 10/10* 1. 1. ... Bf7 2. Bd1
4 3. Bf3
3-> 0.00 0.03 1. ... Bf7 2. Bd1 Bc4 3. Bf3
4 0.00 0.06 1. ... Bf7 2. Bd1 Bc4 3. Bf3 Bd3
4-> 0.00 0.06 1. ... Bf7 2. Bd1 Bc4 3. Bf3 Bd3
5 0.01 0.06 1. ... Bf7 2. Bd1 Bc4 3. Bg4 Bd3 4.
Bf3
5-> 0.01 0.06 1. ... Bf7 2. Bd1 Bc4 3. Bg4 Bd3 4.
Bf3
6 0.01 0.03 1. ... Bf7 2. Bf3 Kd3 3. Bd1 Bc4 4.
Bf3 Kd4 5. Bg4 Bd3 6. Bf3 Bc4 <HT>
6-> 0.01 0.03 1. ... Bf7 2. Bf3 Kd3 3. Bd1 Bc4 4.
Bf3 Kd4 5. Bg4 Bd3 6. Bf3 Bc4 <HT>
7 0.03 0.26 1. ... Bf7 2. Bg4 Kd3 3. e5 fxe5+ 4.
Kxe5 Ke3 5. f6 gxf6+ 6. Kxf6 Bd5
7-> 0.03 0.26 1. ... Bf7 2. Bg4 Kd3 3. e5 fxe5+ 4.
Kxe5 Ke3 5. f6 gxf6+ 6. Kxf6 Bd5
8 0.04 0.21 1. ... Bf7 2. Bd1 Kd3 3. e5 fxe5+ 4.
Kxe5 Ke3 5. Bg4 Bc4 6. f6 gxf6+ 7.
Kxf6
8-> 0.04 0.21 1. ... Bf7 2. Bd1 Kd3 3. e5 fxe5+ 4.
Kxe5 Ke3 5. Bg4 Bc4 6. f6 gxf6+ 7.
Kxf6
9 0.06 0.20 1. ... Bf7 2. Bd1 Kd3 3. e5 fxe5+ 4.
Kxe5 Ke3 5. f6 gxf6+ 6. Kxf6 Bd5 7.
Kg6 Kd2
9-> 0.07 0.20 1. ... Bf7 2. Bd1 Kd3 3. e5 fxe5+ 4.
Kxe5 Ke3 5. f6 gxf6+ 6. Kxf6 Bd5 7.
Kg6 Kd2
10 0.11 0.26 1. ... Bf7 2. Bd1 Kd3 3. e5 fxe5+ 4.
Kxe5 Bc4 5. Kd6 Ke3 6. Kc5 Bf7 7. Bg4
10 0.17 ++ 1. ... Ba4!!
10 0.23 1.24 1. ... Ba4 2. Kf3 Bc6 3. Kf4 Bxe4 4.
Bc4 Bc2 5. Be2 Bd3 6. Bf3 Bc4 7. Bc6
Bd3 <HT>
10-> 0.23 1.24 1. ... Ba4 2. Kf3 Bc6 3. Kf4 Bxe4 4.
Bc4 Bc2 5. Be2 Bd3 6. Bf3 Bc4 7. Bc6
Bd3 <HT>
11 0.29 1.27 1. ... Ba4 2. Kf3 Bc6 3. Kf4 Bxe4 4.
Bc4 Bd5 5. Be2 Bc6 6. Ba6 Bd5 7. Bb5
11-> 0.34 1.27 1. ... Ba4 2. Kf3 Bc6 3. Kf4 Bxe4 4.
Bc4 Bd5 5. Be2 Bc6 6. Ba6 Bd5 7. Bb5
12 0.43 1.24 1. ... Ba4 2. Kf3 Bc6 3. Kf4 Bxe4 4.
Bc4 Bd5 5. Be2 Bg8 6. Bf3 Bc4 7. Bc6
Bd3 <HT>
(2) 12-> 0.62 1.24 1. ... Ba4 2. Kf3 Bc6 3. Kf4 Bxe4 4.
Bc4 Bd5 5. Be2 Bg8 6. Bf3 Bc4 7. Bc6
Bd3 <HT>
13 0.86 1.24 1. ... Ba4 2. Kf3 Bc6 3. Kf4 Bxe4 4.
Bc4 Bd5 5. Ba6 Bf7 6. Be2 Bg8 <HT>
13-> 1.18 1.24 1. ... Ba4 2. Kf3 Bc6 3. Kf4 Bxe4 4.
Bc4 Bd5 5. Ba6 Bf7 6. Be2 Bg8 <HT>
14 1.51 1.24 1. ... Ba4 2. Kf3 Bc6 3. Kf4 Bxe4 4.
Bc4 Bd5 5. Ba6 Bf7 6. Be2 Bg8 7. Bd1
Bc4 8. Bf3 <HT>
(3) 14-> 2.36 1.24 1. ... Ba4 2. Kf3 Bc6 3. Kf4 Bxe4 4.
Bc4 Bd5 5. Ba6 Bf7 6. Be2 Bg8 7. Bd1
Bc4 8. Bf3 <HT>
(2) 15 6.32 0.91 1. ... Ba4 2. Bd1 Kd3 3. e5 Kd2 4.
Bxb3 Bxb3 5. e6 Bd1 6. b4 Bxh5 7. b5
Be8 8. b6 g5+ 9. Kg4
15-> 15.51 0.91 1. ... Ba4 2. Bd1 Kd3 3. e5 Kd2 4.
Bxb3 Bxb3 5. e6 Bd1 6. b4 Bxh5 7. b5
Be8 8. b6 g5+ 9. Kg4
16 19.39 0.87 1. ... Ba4 2. Bd1 Kd3 3. e5 Kd2 4.
Bxb3 Bxb3 5. e6 Kd3 6. e7 Ba4 7. b4
Be8 8. Kg4 Ke4 9. b5 Bxb5
16-> 24.29 0.87 1. ... Ba4 2. Bd1 Kd3 3. e5 Kd2 4.
Bxb3 Bxb3 5. e6 Kd3 6. e7 Ba4 7. b4
Be8 8. Kg4 Ke4 9. b5 Bxb5
17 32.89 0.95 1. ... Ba4 2. Bd1 Kd3 3. e5 Kd2 4.
Bf3 Kc2 5. e6 Kxb2 6. Bd5 Kc2 7. Bxb3+
Bxb3 8. Kg4 Kd3 9. Kh4 Ke4 10. Kg4
17-> 43.36 0.95 1. ... Ba4 2. Bd1 Kd3 3. e5 Kd2 4.
Bf3 Kc2 5. e6 Kxb2 6. Bd5 Kc2 7. Bxb3+
Bxb3 8. Kg4 Kd3 9. Kh4 Ke4 10. Kg4
18 1:03 1.08 1. ... Ba4 2. Bd1 Kd3 3. e5 Kd2 4.
Bf3 Kc2 5. e6 Kxb2 6. Bd5 Kc2 7. Bxb3+
Bxb3 8. Kg4 Kd3 9. Kh4 Ba4 10. e7 Be8
11. Kg4
18-> 1:26 1.08 1. ... Ba4 2. Bd1 Kd3 3. e5 Kd2 4.
Bf3 Kc2 5. e6 Kxb2 6. Bd5 Kc2 7. Bxb3+
Bxb3 8. Kg4 Kd3 9. Kh4 Ba4 10. e7 Be8
11. Kg4
19 2:01 ++ 1. ... Ba4!!
19 3:03 2.27 1. ... Ba4 2. Bd1 Kd3 3. e5 Kd2 4.
Bf3 Kc2 5. e6 Kxb2 6. Bd5 Kc2 7. Kg4
b2 8. Be4+ Kc1 9. e7 Be8 10. Kh4 Bb5
11. Kg4 Be2+ 12. Kh4 Bb5
19-> 3:41 2.27 1. ... Ba4 2. Bd1 Kd3 3. e5 Kd2 4.
Bf3 Kc2 5. e6 Kxb2 6. Bd5 Kc2 7. Kg4
b2 8. Be4+ Kc1 9. e7 Be8 10. Kh4 Bb5
11. Kg4 Be2+ 12. Kh4 Bb5
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