Author: Bernhard Bauer
Date: 05:36:40 08/26/05
Go up one level in this thread
On August 26, 2005 at 08:14:21, Gian-Carlo Pascutto wrote:
>[D]2r2k2/5pp1/1p1p1q1p/p1rRpP2/2PbP3/PP4P1/3QB1KP/2R5 b - -
>
>Zappa played 27. .. Ke7, which looks funny, but is not bad. In fact, against
>Deep Sjeng (and countless other programs) it is the winning move. Like a red lap
>against a bull, Deep Sjeng replied with b4?? which is losing. Black's king looks
>exposed in the center but is in reality unassainable, instead *white* must be
>careful. Zappa must have seen it because the score went up immediately after b4.
>
>White can at least draw with 28. a4.
>
>Your mission is: avoid 28. b4
>
>[D]3k4/6p1/3p1pP1/4pP2/3bP2q/r2B1Q1p/7P/3R3K w - -
>
>49. Rb1 loses instantly because after Rc3, white is in zugzwang! Deep Sjeng
>could not avoid it because of that. Can your program (and does it understand
>what is happening)?
>
>--
>GCP
Here is what I get from Crafty19.20 for your second position.
A zugzwang position in a real game!
time surplus 0.00 time limit 45:00 (45:00)
depth time score variation (1)
7 0.12 -1.02 1. Rf1 Rc3 2. Rb1 Qf4 3. Qf1 Qxf1+
4. Bxf1 Kc7 5. Be2
7 0.23 -0.94 1. Rb1 Qh6 2. Qd1 Qe3 3. Bc2 Ke7 4.
Rb8
7-> 0.26 -0.94 1. Rb1 Qh6 2. Qd1 Qe3 3. Bc2 Ke7 4.
Rb8
8 0.34 -1 1. Rb1
8 0.36 -3.53 1. Rb1 Rxd3 2. Qxd3 Qg4 3. Rb8+ Kc7
4. Qc4+ Bc5 5. Rc8+ Kxc8 6. Qg8+ Kb7
7. Qxg7+
8 0.45 -1.16 1. Qe2 Qf4 2. Qf1 Ke7 3. Qxf4 exf4
4. Bf1 Bf2 5. Bc4
8-> 0.56 -1.16 1. Qe2 Qf4 2. Qf1 Ke7 3. Qxf4 exf4
4. Bf1 Bf2 5. Bc4
9 0.75 -1.19 1. Qe2 Qf4 2. Rf1 Qg5 3. Bc4 Re3 4.
Qc2 Qg2+ 5. Qxg2 hxg2+ 6. Kxg2 Rxe4
9-> 0.98 -1.19 1. Qe2 Qf4 2. Rf1 Qg5 3. Bc4 Re3 4.
Qc2 Qg2+ 5. Qxg2 hxg2+ 6. Kxg2 Rxe4
10 1.28 -1 1. Qe2
10 1.33 -1.59 1. Qe2 Qf4 2. Rf1 Qg5 3. Bc4 Re3 4.
Qa2 Ke7 5. Qc2 Kf8
10 1.61 -1.49 1. Rf1 Rc3 2. Ra1 Qg5 3. Qxh3 Rxd3
4. Qh8+ Kc7 5. Qxg7+ Kc6 6. Ra6+ Bb6
7. Qe7
10-> 2.29 -1.49 1. Rf1 Rc3 2. Ra1 Qg5 3. Qxh3 Rxd3
4. Qh8+ Kc7 5. Qxg7+ Kc6 6. Ra6+ Bb6
7. Qe7
11 3.76 -1.23 1. Rf1 Rc3 2. Ra1 Kc7 3. Rd1 Qf4 4.
Qxh3 Qxe4+ 5. Bxe4 Rxh3 6. Rc1+ Bc3
7. Kg2
11-> 3.98 -1.23 1. Rf1 Rc3 2. Ra1 Kc7 3. Rd1 Qf4 4.
Qxh3 Qxe4+ 5. Bxe4 Rxh3 6. Rc1+ Bc3
7. Kg2
12 5.61 -1.36 1. Rf1 Rc3 2. Ra1 Rb3 3. Rf1 Rb2 4.
Bc4 Qf4 5. Qxf4 exf4 6. Rd1 Bc5 7.
Ra1
12-> 6.28 -1.36 1. Rf1 Rc3 2. Ra1 Rb3 3. Rf1 Rb2 4.
Bc4 Qf4 5. Qxf4 exf4 6. Rd1 Bc5 7.
Ra1
13 18.39 -1.48 1. Rf1 Ke7 2. Rb1 d5 3. Rd1 Qg5 4.
Qf1 dxe4 5. Bxe4 Qg4 6. Re1 Ra2 7.
Qc4 Rd2
13 27.81 -1.24 1. Qe2 Qf4 2. Rf1 Qg5 3. Bc4 Rc3 4.
Ba6 Rc1 5. Rxc1 Qxc1+ 6. Qf1 Qc6 7.
Bd3 d5
13-> 29.06 -1.24 1. Qe2 Qf4 2. Rf1 Qg5 3. Bc4 Rc3 4.
Ba6 Rc1 5. Rxc1 Qxc1+ 6. Qf1 Qc6 7.
Bd3 d5
14 36.48 -1.31 1. Qe2 Qf4 2. Rf1 Qg5 3. Bc4 Ke7 4.
Bf7 Re3 5. Qa2 Qg2+ 6. Qxg2 hxg2+ 7.
Kxg2 Rxe4 8. Bc4 Re3
14-> 49.12 -1.31 1. Qe2 Qf4 2. Rf1 Qg5 3. Bc4 Ke7 4.
Bf7 Re3 5. Qa2 Qg2+ 6. Qxg2 hxg2+ 7.
Kxg2 Rxe4 8. Bc4 Re3
15 1:55 -1.27 1. Qe2 Qf4 2. Rf1 Qg5 3. Bc4 Ke7 4.
Bf7 Re3 5. Qa2 Qg2+ 6. Qxg2 hxg2+ 7.
Kxg2 Rxe4 8. Bc4 Be3 9. Bd5
15-> 1:57 -1.27 1. Qe2 Qf4 2. Rf1 Qg5 3. Bc4 Ke7 4.
Bf7 Re3 5. Qa2 Qg2+ 6. Qxg2 hxg2+ 7.
Kxg2 Rxe4 8. Bc4 Be3 9. Bd5
16 2:57 -1.30 1. Qe2 Qf4 2. Rf1 Qg5 3. Bc4 Ke7 4.
Bf7 Re3 5. Qa2 Qg2+ 6. Qxg2 hxg2+ 7.
Kxg2 Rxe4 8. Kg3 Be3 9. Bd5 Ra4
16-> 5:28 -1.30 1. Qe2 Qf4 2. Rf1 Qg5 3. Bc4 Ke7 4.
Bf7 Re3 5. Qa2 Qg2+ 6. Qxg2 hxg2+ 7.
Kxg2 Rxe4 8. Kg3 Be3 9. Bd5 Ra4
So Crafty sees the mess within a second.
Kind regards
Bernhard
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