Author: Dieter Buerssner
Date: 02:17:38 09/15/00
Go up one level in this thread
On September 14, 2000 at 15:55:55, Dann Corbit wrote:
>Here are a set of tough positions to search deeply. Just finding a mate is not
>good enough, uless you can *prove* it is the shortest mate. Analyze to a depth
>of 16 plies.
Yace 0.23, disabled some search extensions, but still doing
1 full ply extension for each check, and pretty wide qsearch.
Crafty-like null move algorithm. AMD K6-2 475, 30 MB hash. Second column is
time in seconds.
setb r1b1r1k1/ppq2p1p/3b1ppQ/2n5/8/3B2N1/PPP2PPP/R1B2RK1 w - -
[...]
7314000 41.32 675 13t : Ng3h5 Bd6xh2+ Kg1h1 g6xh5 Bd3xh7+ Kg8h8 Bh7g6+
Kh8g8 Qh6h7+ Kg8f8 Bc1h6+ Kf8e7 Qh7xf7+ Ke7d6
Qf7xe8 Nc5e6 Kh1xh2 Kd6c5+ Kh2g1 Ne6d4 [610]
9729804 51.85 675 13. : Ng3h5 Bd6xh2+ Kg1h1 g6xh5 Bd3xh7+ Kg8h8 Bh7g6+
Kh8g8 Qh6h7+ Kg8f8 Bc1h6+ Kf8e7 Qh7xf7+ Ke7d6
Qf7xe8 Nc5e6 Kh1xh2 Kd6c5+ Kh2g1 Ne6d4 [610]
14628796 79.17 701 14t : Ng3h5 Bd6xh2+ Kg1h1 g6xh5 Bd3xh7+ Kg8h8 Bh7g6+
Kh8g8 Qh6h7+ Kg8f8 Bc1h6+ Kf8e7 Qh7xf7+ Ke7d6
Qf7xe8 Nc5e6 Kh1xh2 Kd6c5+ Kh2g1 Kc5b6 Bg6d3
[610]
20195566 104.1 701 14. : Ng3h5 Bd6xh2+ Kg1h1 g6xh5 Bd3xh7+ Kg8h8 Bh7g6+
Kh8g8 Qh6h7+ Kg8f8 Bc1h6+ Kf8e7 Qh7xf7+ Ke7d6
Qf7xe8 Nc5e6 Kh1xh2 Kd6c5+ Kh2g1 Kc5b6 Bg6d3
[610]
36263433 195.1 736 15t : Ng3h5 Bd6xh2+ Kg1h1 g6xh5 Bd3xh7+ Kg8h8 Bh7g6+
Kh8g8 Qh6h7+ Kg8f8 Bc1h6+ Kf8e7 Qh7xf7+ Ke7d6
Qf7xe8 Nc5d7 Ra1d1+ Kd6c6 Qe8e4+ Kc6b5 Qe4d3+
Qc7c4 a2a4+ Kb5c5 Bh6e3+ Kc5b4 Qd3xc4+ Kb4xc4
Kh1xh2 [610]
51483827 261.1 736 15. : Ng3h5 Bd6xh2+ Kg1h1 g6xh5 Bd3xh7+ Kg8h8 Bh7g6+
Kh8g8 Qh6h7+ Kg8f8 Bc1h6+ Kf8e7 Qh7xf7+ Ke7d6
Qf7xe8 Nc5d7 Ra1d1+ Kd6c6 Qe8e4+ Kc6b5 Qe4d3+
Qc7c4 a2a4+ Kb5c5 Bh6e3+ Kc5b4 Qd3xc4+ Kb4xc4
Kh1xh2 [610]
>The first one to solve *any* of these positions to that depth (16 or more) will
>have a poem composed in their honor.
Yace STOP because of serious threats;)
So with a fast machine, it may be possible to come close to 16 plies
under tournament time controls for this position.
- Dieter
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