Author: Dann Corbit
Date: 13:07:46 04/21/05
Go up one level in this thread
On April 21, 2005 at 13:35:37, Dann Corbit wrote:
>On April 21, 2005 at 03:22:19, Steven Edwards wrote:
>
>>On April 20, 2005 at 06:30:43, Steven Edwards wrote:
>>>On April 20, 2005 at 03:04:52, Dann Corbit wrote:
>>>>On April 18, 2005 at 17:10:40, Steven Edwards wrote:
>>
>>>It looks like another three days to go. In the first 215 positions, a forced
>>>mate was found in 58 of them. Symbolic's toolkit is doing the work and is
>>>searching about a quarter billion nodes maximum per problem.
>>
>>The program has now done the first 242 problems so far (one hour per position)
>>and has located 64 mates.
>>
>>Alas it has missed the solution to WAC.230:
>>
>>[D] 2b5/1r6/2kBp1p1/p2pP1P1/2pP4/1pP3K1/1R3P2/8 b - - 0 1
>
>Crafty can solve it with Jeremiah's wall detection enabled.
>Shredder solves it nicely.
>
>121 Rb4; id "WAC.230";
> Searching move: Rb7-b4
> Best move (Shredder 7.04 UCI): Rb7-b4
> identical moves! Found in: 01:08
> illegal command
> 2/3- 00:00 36 255 +2.80 Rb7a7 Bd6a3
> 2/3 00:00 59 418 +2.74 Rb7a7 Bd6a3
> 3/4 00:00 196 1.390 +2.73 Rb7a7 Bd6a3 a5a4
> 3/4+ 00:00 261 1.851 +2.77 a5a4 f2f4 Rb7b5
> 3/4 00:00 321 2.276 +2.81 a5a4 Bd6a3 Rb7h7
> 4/6 00:00 713 5.056 +2.74 a5a4 f2f3 Rb7a7 Bd6a3
> 5/8 00:00 2.096 14.865 +2.63 a5a4 Kg3f4 Rb7a7 Bd6a3 Ra7f7+ Kf4e3
> 5/8+ 00:00 2.760 19.574 +2.64 Rb7f7 f2f4
> 5/8 00:00 3.470 24.609 +2.78 Rb7f7 f2f3 a5a4 Bd6a3 Bc8b7
> 6/9 00:00 6.002 42.567 +2.64 Rb7f7 f2f3 Rf7f5 f3f4 a5a4 Rb2h2
> 6/9+ 00:00 6.992 44.820 +2.65 a5a4 Kg3f3
> 6/10 00:00 8.960 57.435 +2.65 a5a4 Kg3f4 Rb7f7+ Kf4e3 Bc8d7
> 7/12 00:00 15.512 90.186 +2.67 a5a4 Kg3f4 Rb7h7 Kf4e3 Rh7h3+ f2f3
>Bc8b7 Rb2b1
> 7/12+ 00:00 17.032 99.023 +2.68 Rb7f7 f2f3 Rf7f5 f3f4 a5a4 Rb2h2
>Bc8b7
> 7/12 00:00 19.288 103.144 +2.69 Rb7f7 f2f3 a5a4 Kg3f2 Kc6b5
> 8/12 00:00 33.714 166.078 +2.77 Rb7f7 f2f4 a5a4 Kg3f3 Rf7h7 Rb2d2
> 9/13 00:00 74.618 298.472 +2.64 Rb7f7 f2f4 Kc6b5 Rb2h2 Bc8a6 Kg3f3
>a5a4 Bd6a3 Ba6b7
> 9/13+ 00:00 86.678 325.857 +2.65 a5a4 Kg3f4 Rb7h7 Bd6a3 Rh7h5 f2f3
>Bc8b7 Rb2b1 Kc6b5
> 9/14 00:00 103.008 346.828 +2.67 a5a4 Kg3f4 Rb7h7 Rb2b1 Bc8b7 f2f3
>Rh7h3 Bd6e7 Kc6b5
> 10/16 00:00 179.902 443.108 +2.66 a5a4 Bd6a3 Kc6b5 Kg3f4 Rb7h7 f2f3
>Rh7h1
> 10/16+ 00:00 192.740 456.729 +2.67 Rb7f7 f2f4 Kc6b5 Rb2h2 Bc8b7 Kg3f3
>a5a4 Bd6a3
> 10/16 00:00 220.928 487.699 +2.67 Rb7f7 Bd6a3 Bc8d7 f2f4 Rf7h7 Rb2h2
>Rh7h5
> 10/16+ 00:00 242.620 501.280 +2.68 Rb7h7 Rb2b1 a5a4 Bd6a3
> 10/16 00:00 266.456 532.912 +2.74 Rb7h7 Rb2b1 a5a4 Kg3f4 Bc8b7 f2f3
>Rh7h3 Bd6e7 Kc6b5 Kf4e3
> 11/18 00:00 371.402 566.161 +2.70 Rb7h7 Rb2b1 Rh7f7 Rb1a1 Kc6b5 f2f3
>b3b2 Ra1b1 Bc8b7
> 12/21 00:01 658.896 648.519 +2.77 Rb7h7 Rb2b1 a5a4 Kg3f4 Rh7h3 Bd6b4
>Bc8b7 f2f3 Rh3h2 Rb1a1 Kc6b5 Bb4e7
> 13/22 00:01 957.398 688.280 +2.72 Rb7h7 Rb2b1 a5a4 Bd6a3 Kc6b5 Kg3f4
>Bc8b7 f2f3 Rh7h2 Rb1b2 Rh2h5
> 14/27 00:02 1.516.756 719.182 +2.73 Rb7h7 Rb2b1 a5a4 Bd6a3 Kc6b5 Kg3f4
>Bc8b7 f2f3 Rh7h2 Rb1b2 Rh2h3 Kf4e3 Bb7c6 Ba3d6
> 15/28 00:04 2.850.268 750.663 +2.75 Rb7h7 Rb2b1 Rh7h5 Kg3g4 a5a4 Rb1a1
>Kc6b5 Bd6a3 Bc8b7 Kg4f4 Kb5b6 f2f3 Kb6a5
> 16/27 00:05 3.956.239 760.376 +2.74 Rb7h7 Rb2b1 Rh7h5 Kg3g4 a5a4 Rb1a1
>Kc6b5 Bd6a3 Rh5h7 Kg4f4 Rh7h3 f2f3 Kb5a5
> 17/30 00:08 6.755.305 790.371 +2.75 Rb7h7 Rb2b1 Rh7h5 Kg3g4 a5a4 Rb1a1
>Kc6b5 Bd6a3 Bc8b7 Kg4f4 Rh5h3 f2f3 Bb7c6 Ba3e7 Kb5a5
> 18/31 00:11 9.148.882 792.316 +2.77 Rb7h7 Rb2b1 Rh7h5 Kg3g4 a5a4 Bd6a3
>Bc8b7 Kg4f4 Rh5h2 Kf4g3 Rh2h8
> 19/31 00:16 13.187.007 792.440 +2.78 Rb7h7 Rb2b1 Rh7h5 Kg3g4 a5a4 Bd6a3
>Bc8b7 Kg4f4 Kc6b5 Kf4g4 Rh5h7 Kg4g3 b3b2
> 20/33 00:25 20.422.253 801.847 +2.79 Rb7h7 Rb2b1 Rh7h5 Kg3g4 a5a4 Bd6a3
>Bc8b7 Rb1a1 Kc6b6 Ba3c5+ Kb6b5 Ra1b1 Bb7c6 Bc5a3 Bc6d7
> 21/35 00:34 27.710.404 806.120 +2.79 Rb7h7 Rb2b1 Rh7h5 Kg3g4 a5a4 Bd6a3
>Bc8b7 Rb1a1 Kc6b6 Ba3c5+ Kb6b5 Ra1b1 Rh5h7 Bc5a3 Kb5a6 Rb1a1 Rh7h5
> 21/41+ 01:08 56.277.246 825.894 +2.80 Rb7b4 Bd6xb4 a5xb4 c3xb4
> 21/41 02:02 107.189.670 874.011 +3.11 Rb7b4 c3xb4 a5a4 b4b5+ Kc6xb5 Bd6a3
>c4c3 Rb2e2 Kb5c4 f2f4 Bc8d7 f4f5 e6xf5 Kg3f4 Kc4xd4 e5e6 Bd7e8
> 22/41 02:39 137.897.543 866.261 +2.87 Rb7b4 c3xb4 a5a4 b4b5+ Kc6xb5 Bd6a3
>c4c3 Rb2e2 Kb5c4 f2f4 Kc4xd4 f4f5 e6xf5 e5e6 Kd4c4 e6e7 Bc8d7 e7e8Q d5d4 Qe8xd7
> 23/43+ 04:04 210.222.048 859.420 +3.12 Rb7b4 c3xb4 a5a4 b4b5+ Kc6xb5 Bd6a3
>c4c3 Rb2e2 Kb5c4 f2f4 Bc8d7 f4f5 e6xf5 Kg3f4 Kc4xd4 e5e6 Bd7e8
> 23/44 06:46 353.534.529 870.809 +3.41 Rb7b4 c3xb4 a5a4 b4b5+ Kc6xb5 Bd6a3
>c4c3 Rb2e2 Kb5c4 f2f4 Bc8d7 Re2e1 Kc4xd4 Kg3f2 Kd4c4 Kf2e2 b3b2 Re1b1 Bd7b5
>Ba3xb2 Kc4b3+ Ke2f2 c3xb2 Rb1f1
> 24/41- 07:15 377.886.714 867.739 +3.16 Rb7b4 c3xb4 a5a4 b4b5+ Kc6xb5 Bd6a3
>c4c3 Rb2e2 Kb5c4 f2f4 Bc8d7 f4f5 e6xf5 Kg3f4 Kc4xd4 e5e6 Bd7e8 Re2f2 Be8b5
> 24/42 08:15 423.692.276 855.862 +2.91 Rb7b4 c3xb4 a5a4 b4b5+ Kc6xb5 Bd6a3
>c4c3 Rb2e2 Kb5c4 f2f4 Kc4xd4 f4f5 Bc8a6 Re2h2 e6xf5 e5e6 Ba6b5 Kg3f4 c3c2 Rh2h8
>Kd4c3
> 4/21/2005 7:58:59 AM, Time for this analysis: 00:10:00, Rated time: 14:08
Crafty, thinking for a while on WAC.230 finds the key move early (With
Jeremiah's extension).
However, the key (equally brilliant) refutation Re2 by white at move 4 is not
discovered after one hour.
Crafty v19.19
White(1): hash 512M
hash table memory = 384M bytes.
White(1): hashp 256M
pawn hash table memory = 192M bytes.
White(1): st 7200
search time set to 7200.00.
White(1): epdpfga \wac230.epd wac230cr.out
PFGA: EPD record: 1 ID: WAC.230
time surplus 0.00 time limit 120:00 (120:00)
depth time score variation (1)
9 0.16 -1.34 1. ... Rh7 2. Rb1 Kb5 3. Ba3 Rh5 4.
Kf4 Ka4 5. Bb2 Kb5
9-> 0.31 -1.34 1. ... Rh7 2. Rb1 Kb5 3. Ba3 Rh5 4.
Kf4 Ka4 5. Bb2 Kb5
10 0.53 -1.19 1. ... Rh7 2. Rb1 Kb5 3. Ba3 Rh5 4.
Kf4 Ka4 5. Bb2 Rh4+ 6. Kg3 Rh5
10-> 0.75 -1.19 1. ... Rh7 2. Rb1 Kb5 3. Ba3 Rh5 4.
Kf4 Ka4 5. Bb2 Rh4+ 6. Kg3 Rh5
11 1.09 -1.35 1. ... Rh7 2. Rb1 Kb5 3. Ba3 Rh5 4.
Kf4 Bd7 5. Rb2 Ka4 6. Bc5 Rh2
11-> 1.34 -1.35 1. ... Rh7 2. Rb1 Kb5 3. Ba3 Rh5 4.
Kf4 Bd7 5. Rb2 Ka4 6. Bc5 Rh2
12 1.61 +1 1. ... Rh7
12 1.89 0.00 1. ... Rh7 2. Rb1 Kb5 3. Ba3 Rh5 4.
Kg4 a4 5. f3 Bd7 6. Rb2 Kc6 7. Rb1
12 3.58 -1.39 1. ... Rb4 2. cxb4 a4 3. Rb1 c3 4.
b5+ Kxb5 5. Kf4 c2 6. Rc1 b2 7. Rxc2
b1=Q 8. Rc5+ Kb6 9. Rxc8
12-> 4.02 -1.39 1. ... Rb4 2. cxb4 a4 3. Rb1 c3 4.
b5+ Kxb5 5. Kf4 c2 6. Rc1 b2 7. Rxc2
b1=Q 8. Rc5+ Kb6 9. Rxc8
13 5.89 -1.17 1. ... Rb4 2. cxb4 a4 3. b5+ Kxb5 4.
Rb1 c3 5. Ra1 b2 6. Rb1 Kc4 7. Ba3
Kb3 8. Bxb2 c2 9. Rc1 <HT>
13-> 7.77 -1.17 1. ... Rb4 2. cxb4 a4 3. b5+ Kxb5 4.
Rb1 c3 5. Ra1 b2 6. Rb1 Kc4 7. Ba3
Kb3 8. Bxb2 c2 9. Rc1 <HT>
14 10.44 -1.17 1. ... Rb4 2. cxb4 a4 3. b5+ Kxb5 4.
Rb1 c3 5. Ra1 b2 6. Rb1 Kc4 7. Ba3
Kb3 8. Bxb2 c2 9. Rc1 Kxb2
14-> 12.55 -1.17 1. ... Rb4 2. cxb4 a4 3. b5+ Kxb5 4.
Rb1 c3 5. Ra1 b2 6. Rb1 Kc4 7. Ba3
Kb3 8. Bxb2 c2 9. Rc1 Kxb2
15 17.45 -1 1. ... Rb4!!
15 23.48 -1.94 1. ... Rb4 2. cxb4 a4 3. b5+ Kxb5 4.
Rb1 c3 5. Ra1 b2 6. Rb1 Kc4 7. Ba3
Kb3 8. Bxb2 c2 9. Re1 Kxb2 10. Re2
15-> 27.55 -1.94 1. ... Rb4 2. cxb4 a4 3. b5+ Kxb5 4.
Rb1 c3 5. Ra1 b2 6. Rb1 Kc4 7. Ba3
Kb3 8. Bxb2 c2 9. Re1 Kxb2 10. Re2
16 1:03 -2.06 1. ... Rb4 2. Rb1 Ra4 3. Rc1 Ra2 4.
Kf3 a4 5. Ke3 Ba6 6. f3 Bb5 7. Bb4
Rh2 8. Rb1 Rh5 9. Kf4
16-> 1:11 -2.06 1. ... Rb4 2. Rb1 Ra4 3. Rc1 Ra2 4.
Kf3 a4 5. Ke3 Ba6 6. f3 Bb5 7. Bb4
Rh2 8. Rb1 Rh5 9. Kf4
17 2:07 -2.06 1. ... Rb4 2. Rb1 Ra4 3. Rc1 Ra2 4.
Kf3 a4 5. Ke3 Ba6 6. f3 Rh2 7. Rb1
Bb5 8. Kf4 Rc2 9. Bb4 Rh2
17-> 2:31 -2.06 1. ... Rb4 2. Rb1 Ra4 3. Rc1 Ra2 4.
Kf3 a4 5. Ke3 Ba6 6. f3 Rh2 7. Rb1
Bb5 8. Kf4 Rc2 9. Bb4 Rh2
18 3:59 -2.09 1. ... Rb4 2. Rb1 Ra4 3. Rc1 Ra2 4.
Kf3 a4 5. Ke3 Ba6 6. f3 Bb5 7. Bc5
Rh2 8. Ba3 Rh5 9. Kf4 Rh4+ 10. Kg3
Rh5
18-> 4:58 -2.09 1. ... Rb4 2. Rb1 Ra4 3. Rc1 Ra2 4.
Kf3 a4 5. Ke3 Ba6 6. f3 Bb5 7. Bc5
Rh2 8. Ba3 Rh5 9. Kf4 Rh4+ 10. Kg3
Rh5
19 9:04 -2.18 1. ... Rb4 2. Rb1 Ra4 3. Rc1 Ra2 4.
Kf3 Ba6 5. Ke3 Bb5 6. Be7 Kd7 7. Bd6
Ke8 8. f3 a4 9. Rb1 <HT>
19-> 12:33 -2.18 1. ... Rb4 2. Rb1 Ra4 3. Rc1 Ra2 4.
Kf3 Ba6 5. Ke3 Bb5 6. Be7 Kd7 7. Bd6
Ke8 8. f3 a4 9. Rb1 <HT>
20 22:14 -1 1. ... Rb4!!
20 47:04 -3.54 1. ... Rb4 2. cxb4 a4 3. b5+ Kxb5 4.
Rb1 c3 5. Ba3 Kc4 6. f3 Kxd4 7. Rh1
Kxe5 8. Bc5 d4 9. Rd1 c2 10. Bxd4+
Kd5 11. Rd2 c1=Q 12. Be3+ Ke5 13. Bf4+
Kf5 14. Rd5+ exd5 15. Bxc1
20-> 55:13 -3.54 1. ... Rb4 2. cxb4 a4 3. b5+ Kxb5 4.
Rb1 c3 5. Ba3 Kc4 6. f3 Kxd4 7. Rh1
Kxe5 8. Bc5 d4 9. Rd1 c2 10. Bxd4+
Kd5 11. Rd2 c1=Q 12. Be3+ Ke5 13. Bf4+
Kf5 14. Rd5+ exd5 15. Bxc1
21 64:45 1/16* 1. ... Rb4
[D]2b5/8/3Bp1p1/1k1pP1P1/p1pP4/1p4K1/1R3P2/8 w - - ce -211; id "WAC.230 after
Rb4 cxb4 a4 b5+ Kxb5"; pm Re2; pv Re2 c3 Ba3 Kc4 f4 Kd3 Kf3 Kxd4 f5 exf5 e6 Kd3
e7 Bd7 Re3+ Kc2 Re2+ Kb1 e8=Q Bxe8 Rxe8 Ka2 Rg8 b2 Bxb2 cxb2;
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