Author: Dann Corbit
Date: 11:53:00 02/07/01
Go up one level in this thread
On February 07, 2001 at 14:40:16, Jim Monaghan wrote:
>[D] 4k3/8/4K3/b7/8/4p3/6pP/2R5 w - - 0 1
>
>Although Crafty "solves" this study, it's odd that it still thinks that
>it's losing. Crafty is not alone in it's evaluation of the final position.
>Many engines "think" it's an advantage to have 2 bishops of the same colour in
>an endgame situation.
>I guess in a way it doesn't matter ... if this had been a game situation,
>Crafty would have chosen the right path anyway.
>Neat stalemate idea.
>
>nss depth time score variation (1)
> 7 1.15 -3.74 1. Rc8+ Bd8 2. Rc1 e2 3. h4 Kf8 4.
> h5 Bb6 5. Rc8+ Kg7 6. h6+ Kxh6
> 7-> 1.43 -3.74 1. Rc8+ Bd8 2. Rc1 e2 3. h4 Kf8 4.
> h5 Bb6 5. Rc8+ Kg7 6. h6+ Kxh6
> 8 1.73 ++ 1. Rc8+!!
> 8-> 2.66 -3.35 1. Rc8+ Bd8 2. Rc1 e2 3. h4 Kf8 4.
> h5 Bb6 5. Rc8+ Kg7 6. h6+ Kxh6
> 9 3.05 -- 1. Rc8+
> 9 7.71 -5.70 1. Rc8+ Bd8 2. Rc1 e2 3. h3 Kf8 4.
> Re1 Bb6 5. Rxe2 g1=Q 6. Re4 Kg7
> 9-> 8.85 -5.70 1. Rc8+ Bd8 2. Rc1 e2 3. h3 Kf8 4.
> Re1 Bb6 5. Rxe2 g1=Q 6. Re4 Kg7
> 10 10.20 -- 1. Rc8+
> 10 11.34 -6.11 1. Rc8+ Bd8 2. Rc1 e2 3. h3 Kf8 4.
> Re1 Ba5 5. Rxe2 g1=Q 6. Re5 Qg6+ 7.
> Kd7 Qd3+ 8. Kc6
> 10-> 13.65 -6.11 1. Rc8+ Bd8 2. Rc1 e2 3. h3 Kf8 4.
> Re1 Ba5 5. Rxe2 g1=Q 6. Re5 Qg6+ 7.
> Kd7 Qd3+ 8. Kc6
> 11 17.78 -6.19 1. Rc8+ Bd8 2. Rc1 e2 3. h3 Kf8 4.
> Re1 Ba5 5. Rxe2 g1=Q 6. Re5 Qg6+ 7.
> Kd5 Qd3+ 8. Kc6 <HT>
> 11-> 21.01 -6.19 1. Rc8+ Bd8 2. Rc1 e2 3. h3 Kf8 4.
> Re1 Ba5 5. Rxe2 g1=Q 6. Re5 Qg6+ 7.
> Kd5 Qd3+ 8. Kc6 <HT>
> 12 24.80 -- 1. Rc8+
> 12 1:35 -7.40 1. Rc8+ Bd8 2. Rc1 e2 3. h3 Kf8 4.
> Re1 Bb6 5. Rxe2 g1=Q 6. Re5 Qg3 7.
> Rf5+ Kg7 8. Rb5 Qxh3+ 9. Kd5
> 12 2:21 -7.01 1. Kf5 e2 2. Kg4 e1=Q 3. Rxe1+ Bxe1
> 4. Kh3 g1=B 5. Kg2 Bgf2 6. Kh3 Kf7
> 7. Kg4 Kf6
> 12-> 2:26 -7.01 1. Kf5 e2 2. Kg4 e1=Q 3. Rxe1+ Bxe1
> 4. Kh3 g1=B 5. Kg2 Bgf2 6. Kh3 Kf7
> 7. Kg4 Kf6
> 13 2:52 -6.90 1. Kf5 e2 2. Kg4 e1=Q 3. Rxe1+ Bxe1
> 4. Kh3 g1=B 5. Kg2 Bgf2 6. Kh3 Kf7
> 7. Kg4 Kf6 8. h3
> 13-> 3:09 -6.90 1. Kf5 e2 2. Kg4 e1=Q 3. Rxe1+ Bxe1
> 4. Kh3 g1=B 5. Kg2 Bgf2 6. Kh3 Kf7
> 7. Kg4 Kf6 8. h3
> 14 4:35 -6.98 1. Kf5 e2 2. Kg4 e1=Q 3. Rxe1+ Bxe1
> 4. Kh3 g1=B 5. Kg2 Bgf2 6. Kh3 Kf7
> 7. Kg4 Kf6 8. h3 Bd2
Endgame tablebase files help out nicely here:
White(1): st 999
search time set to 999.00.
White(1): epdpfga tp.epd tp.out
PFGA: EPD record: 1
end-game phase
clearing hash tables
time surplus 0.00 time limit 16:39 (16:39)
nss depth time score variation (1)
6-> 0.37 -5.33 1. Rc8+
7 0.39 ++ 1. Rc8+!!
7-> 0.69 -4.94 1. Rc8+
8 0.76 ++ 1. Rc8+!!
8-> 1.10 -4.55 1. Rc8+
9 1.37 -- 1. Rc8+
9 8.66 -7.50 1. Rc8+ Bd8 2. Rc1 e2 3. h3 Kf8 4.
Re1 Bb6 5. Rxe2 g1=Q 6. Re4 Qg6+ 7.
Kd5 Qf5+ 8. Re5 Qd3+ 9. Kc6 Bf2 10.
Re6 Bh4 11. Kc5 Qxh3 <HT>
9 9.43 ++ 1. Kf5!!
9 12.42 -0.01 1. Kf5 e2 2. Kg4 e1=Q 3. Rxe1+ Bxe1
<HT>
9-> 12.53 -0.01 1. Kf5 e2 2. Kg4 e1=Q 3. Rxe1+ Bxe1
<HT>
10 16.27 -0.01 1. Kf5 e2 2. Kg4 e1=Q 3. Rxe1+ Bxe1
<HT>
10-> 16.81 -0.01 1. Kf5 e2 2. Kg4 e1=Q 3. Rxe1+ Bxe1
<HT>
11 20.49 -0.01 1. Kf5 e2 2. Kg4 e1=Q 3. Rxe1+ Bxe1
<HT>
11-> 21.26 -0.01 1. Kf5 e2 2. Kg4 e1=Q 3. Rxe1+ Bxe1
<HT>
12 28.41 -0.01 1. Kf5 e2 2. Kg4 e1=Q 3. Rxe1+ Bxe1
<HT>
12-> 29.99 -0.01 1. Kf5 e2 2. Kg4 e1=Q 3. Rxe1+ Bxe1
<HT>
13 43.17 -0.01 1. Kf5 e2 2. Kg4 e1=Q 3. Rxe1+ Bxe1
<HT>
13-> 46.66 -0.01 1. Kf5 e2 2. Kg4 e1=Q 3. Rxe1+ Bxe1
<HT>
14 1:06 -0.01 1. Kf5 e2 2. Kg4 e1=Q 3. Rxe1+ Bxe1
<HT>
14-> 1:10 -0.01 1. Kf5 e2 2. Kg4 e1=Q 3. Rxe1+ Bxe1
<HT>
15 1:34 -0.01 1. Kf5 e2 2. Kg4 e1=Q 3. Rxe1+ Bxe1
<HT>
15-> 1:41 -0.01 1. Kf5 e2 2. Kg4 e1=Q 3. Rxe1+ Bxe1
<HT>
16 2:20 -0.01 1. Kf5 e2 2. Kg4 e1=Q 3. Rxe1+ Bxe1
<HT>
16-> 2:32 -0.01 1. Kf5 e2 2. Kg4 e1=Q 3. Rxe1+ Bxe1
<HT>
17 3:37 -0.01 1. Kf5 e2 2. Kg4 e1=Q 3. Rxe1+ Bxe1
<HT>
17-> 3:55 -0.01 1. Kf5 e2 2. Kg4 e1=Q 3. Rxe1+ Bxe1
<HT>
18 3:55 1/21* 1. Kf5
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