Author: Dann Corbit
Date: 11:06:03 08/16/01
Go up one level in this thread
On August 16, 2001 at 04:42:20, Scott Gasch wrote:
>This is a position that can come up in the sicilian dragon. My engine does not
>see it until it's way too late, even in standard time controls.
>
>[D] 3qr1k1/pp1bppb1/3p2p1/2rN2Bn/2nNPPp1/1B6/PPP1Q3/2KR3R b - - 0 1
>
>The idea is to avoid Ng3 because it leads to something like this:
>
>[D] 3qr1k1/pp1bppb1/3p2p1/2rN2B1/2nNPPp1/1B6/PPP4Q/2K4R b - - 0 3
>
>I bet that the strong amateurs and pros will avoid this move quickly. I need
>about 6M nodes and 10 ply to see its bad... even then my engine still wants to
>play it as it thinks the king can sneak out. It can't, according to opening
>book literature.
One of the best programs for "King Safety" is surely Phalanx.
Phalanx solves this position in just a few seconds.
3qr1k1/pp1bppb1/3p2p1/2rN2Bn/2nNPPp1/1B6/PPP1Q3/2KR3R b - -
3qr1k1/pp1bppb1/3p2p1/2rN2Bn/2nNPPp1/1B6/PPP1Q3/2KR3R b - -
-> soft time limit 18000 s
-> hard time limit 144000 s
5 310 54 38084 Nh5-g3 Qe2-d3 Ng3xh1 Rd1xh1 Pb7-b5 Kc1-b1
Pg4-g3
5 -> 0:00.72 49829 0 turns
6 282 140 132011 Nh5-g3 Qe2-h2 Ng3xh1 Rd1xh1
6 -> 0:02.53 241714 0 turns
7 223 419 439983 Nh5-g3 Qe2-h2 Ng3xh1 Rd1xh1 Kg8-f8 Bg5-h6
7 -> 0:13.43 1515994 0 turns
8 223 1727 1934057 Nh5-g3 ??
8 163 2002 2306947 Nh5-g3
8 168 5768 7543498 Pb7-b5 !
{about 30 seconds, I think, to choose this}
8 181 7347 10349542 Pb7-b5 Bb3xc4 Rc5xc4 Qe2-e3 Pf7-f6 Bg5-h4
Qd8-a5 Kc1-b1 Pf6-f5
8 -> 1:28.97 12640619 1 turn
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