Author: Dann Corbit
Date: 11:24:48 08/16/01
Go up one level in this thread
On August 16, 2001 at 14:06:03, Dann Corbit wrote:
>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
Phalanx (after a bit more time):
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 !
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
9 156 20870 31389611 Pb7-b5 Bg5-h4 Pa7-a5 Pf4-f5 Pg6xf5 Bb3xc4
Pb5xc4 Nd5xe7 Re8xe7 Bh4xe7 Qd8xe7 Rh1xh5
Qe7xe4
9 -> 6:18.75 55911817 0 turns
10 139 64703 95816863 Pb7-b5 Pf4-f5 Nh5-g3 Qe2-h2 Ng3xh1 Rd1xh1
Kg8-f8
10 -> 20:08.49 177887008 0 turns
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