Author: Mihaly Szalai
Date: 10:57:01 10/15/03
Go up one level in this thread
On October 14, 2003 at 10:51:09, Roy Eassa wrote: >On October 11, 2003 at 10:22:39, Mihaly Szalai wrote: > >>White wins. >> >>[D]8/2B5/1P6/8/6K1/3b2pp/8/7k w - - 0 1 >> >>1. b7 g2 2. Bh2 Kxh2 3. b8=Q+ Kh1 4. Qb7 Kh2 5. Qc7+ Kh1 6. Qc6 Kh2 7. Qd6+ Kh1 >>8. Qd5 Bc4 9. Qc6 Bb5 10. Qb7 Ba6 11. Qa8 +- >> > > >A very nice test position! It's a pity people did not respond. > >No engine was able to see that White wins within a few minutes on my 1.2 GHz >Athlon. But since Black's moves are forced for awhile (until the programs see >the win), it's easy to prove that your solution is correct. > >What's the original source of this problem? Thank you for answering me. This is a study by V. Kalandadze, 1984. Very impressive, 7 pieces, elegant solution. Shredder 7.04 is very close to this elegant solution after half an hour on a Celeron 1.7 GHz 64 MB hash. Best wishes Mihaly Kalandadze 8/2B5/1P6/8/6K1/3b2pp/8/7k w - - 0 1 Analysis by Shredder 7.04: 1.b7 g2 2.b8N ˛ (0.48) Depth: 12/12 00:00:00 1.b7 g2 2.b8N ˛ (0.48) Depth: 12/12 00:00:00 1.b7 g2 2.b8N ˛ (0.48) Depth: 12/12 00:00:00 1.b7 g2 2.b8N ˛ (0.48) Depth: 12/12 00:00:00 1.b7 g2 2.b8N ˛ (0.48) Depth: 12/12 00:00:00 1.b7 g2 2.b8N ˛ (0.48) Depth: 12/12 00:00:00 1.b7 g2 2.b8N ˛ (0.48) Depth: 12/12 00:00:00 1.b7 g2 2.b8N ˛ (0.48) Depth: 12/12 00:00:00 1.b7 g2 2.b8N ˛ (0.48) Depth: 12/12 00:00:00 1.b7 g2 2.b8N ˛ (0.48) Depth: 12/12 00:00:00 1.b7 g2 2.b8N ˛ (0.48) Depth: 12/12 00:00:00 1.b7 g2 2.b8N ˛ (0.48) Depth: 12/12 00:00:00 1.b7 g2 2.b8N ˛ (0.48) Depth: 12/12 00:00:00 1.b7 g2 2.b8N ˛ (0.48) Depth: 12/12 00:00:00 1.b7 g2 2.b8N ˛ (0.48) Depth: 12/12 00:00:00 1.b7 g2 2.b8N ˛ (0.48) Depth: 13/13 00:00:01 102kN, tb=1352 1.b7 g2 2.b8Q g1Q+ 3.Kh4 ˛ (0.48) Depth: 14/14 00:00:02 282kN, tb=3302 1.b7 g2 2.b8Q g1Q+ 3.Kh4 ˛ (0.48) Depth: 15/15 00:00:04 602kN, tb=7159 1.b7 g2 2.Bh2 g1R+ 3.Bxg1 Be4 4.b8Q Bb1 ˛ (0.48) Depth: 16/16 00:00:07 1165kN, tb=12586 1.b7 g2 2.Bh2 g1R+ 3.Bxg1 Be4 4.b8Q Bb1 ˛ (0.48) Depth: 17/17 00:00:12 2340kN, tb=20460 1.b7 g2 2.Bh2 g1R+ 3.Bxg1 Be4 4.b8Q Bb1 ˛ (0.48) Depth: 18/18 00:00:26 5637kN, tb=37359 1.b7 g2 2.Bh2 Kxh2 3.b8Q+ Kh1 4.Qb7 h2 5.Qa8 Kg1 6.Kg3 Be4 7.Qa1+ Bb1 ± (0.72) Depth: 19/42 00:02:38 40083kN, tb=248449 1.b7 g2 2.Bh2 Kxh2 3.b8Q+ Kh1 4.Qb7 Kh2 5.Qc7+ Kh1 6.Kxh3 Bf5+ 7.Kg3 g1Q+ 8.Kf3 Qg2+ 9.Kf4 ˛ (0.47) Depth: 20/44 00:05:58 96316kN, tb=440425 1.b7 g2 2.Bh2 Kxh2 3.b8Q+ Kh1 4.Qb7 Kh2 5.Qc7+ Kh1 6.Qc6 Bf1 ˛ (0.47) Depth: 20/44 00:06:23 102852kN, tb=526159 1.b7 g2 2.Bh2 Kxh2 3.b8Q+ Kh1 4.Qb7 Kh2 5.Qc7+ Kh1 6.Qc6 Kh2 7.Qd6+ Kh1 8.Qd5 Bh7 ˛ (0.68) Depth: 21/46 00:11:37 190786kN, tb=1115666 1.b7 g2 2.Bh2 Kxh2 3.b8Q+ Kh1 4.Qb7 Kh2 5.Qc7+ Kh1 6.Qc6 Kh2 7.Qd6+ Kh1 8.Qd5 Bc4 9.Qc6 Be6+ 10.Kg3 Kg1 ± (0.74) Depth: 22/48 00:17:58 286613kN, tb=1695296 1.b7 g2 2.Bh2 Kxh2 3.b8Q+ Kh1 4.Qb7 Kh2 5.Qc7+ Kh1 6.Qc6 Kh2 7.Qd6+ Kh1 8.Qd5 Bc4 9.Qc6 Be6+ 10.Kg3 Kg1 ± (0.80) Depth: 23/50 00:29:45 465635kN, tb=2836215 (Szalai, MyTown 15.10.2003)
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