Author: Dave Gomboc
Date: 23:49:40 05/19/99
Go up one level in this thread
On May 20, 1999 at 02:34:40, Ed Schröder wrote: >>Posted by Francis Monkman on May 19, 1999 at 18:28:49: >> >>This is another excellent example of a 'simple' idea, that >>seems to prove hard for programs to find. >> >>r4rk1/1nqb1pbn/3p2pB/pppP3p/4P3/1PP2NNP/P1BQ2P1/R4RK1 w - - >> >>[Smejkal-Medina, Amsterdam II 1971] >> >>Looking at the position, the idea is, clear the b1-h7 diagonal, >>then piece for piece and the queen to g5 giving check etc. >> >>e5! dxe5 Nxh5 gxh5 Bxh7 Kxh7 Bxg7 Kxg7 Qg5+ (9-ply, and >>surely there's enough 'interest' here to grab an extension?) >>...Kh7 Qxh5+ Kg7 (for obvious but misplaced reasons, programs >>prefer ...Kg8) Ng5 1-0 >> >>None of the engines I tried (Fritz, Rebel, Genius, CSTal II) found >>e5 within 5 mins. I left LGG 2.0 looking at it while I took a break, >>and it had found it after 16 mins. (So not to say the others won't.) > >Rebel10.5 (setting Deepen King Safety) 3 seconds > > |-----|-----|-----|-----|-----|-----|-----|-----| CCC.EPD bm e5 >8 | *R | | | | | *R | *K | | > |-----|-----|-----|-----|-----|-----|-----|-----| 00:00:00 00:01:02 >7 | | *N | *Q | *B | | *p | *B | *N | > |-----|-----|-----|-----|-----|-----|-----|-----| >6 | | | | *p | | | *p | B | Time infinite > |-----|-----|-----|-----|-----|-----|-----|-----| Hash 60 Mb >5 | *p | *p | *p | p | | | | *p | Engine REBEL10.5 > |-----|-----|-----|-----|-----|-----|-----|-----| >4 | | | | | p | | | | anti-GM Off > |-----|-----|-----|-----|-----|-----|-----|-----| System Tiger Off >3 | | p | p | | | N | N | p | Combination Off > |-----|-----|-----|-----|-----|-----|-----|-----| Style Normal >2 | p | | B | Q | | | p | | Strength Strongest > |-----|-----|-----|-----|-----|-----|-----|-----| Search Deepen King S >1 | R | | | | | R | K | | > |-----|-----|-----|-----|-----|-----|-----|-----| > a b c d e f g h > >r4rk1/1nqb1pbn/3p2pB/pppP3p/4P3/1PP2NNP/P1BQ2P1/R4RK1 w - - > >00:00:00 1.00 0.38 Bh6xg7 Kg8xg7 (0) >00:00:00 2.00 0.75 Bh6xg7 Kg8xg7 Nf3-h4 (0) >00:00:00 3.00 0.36 Bh6xg7 Kg8xg7 Nf3-h4 Kg7-h8 (0) >00:00:00 3.01 0.57 Nf3-h4 Nh7-f6 Bh6xg7 Kg8xg7 Ra1-e1 (0) >00:00:00 4.00 0.57 Nf3-h4 Nh7-f6 Bh6xg7 Kg8xg7 Ra1-e1 (0) >00:00:01 5.00 0.34 Nf3-h4 Ra8-e8 Bh6xg7 Kg8xg7 Ra1-e1 Kg7-h8 (0) >00:00:01 5.01 0.45 Bh6xg7 Kg8xg7 a2-a4 b5xa4 b3xa4 f7-f5 e4xf5 (1) >00:00:01 5.05 0.50 Ra1-e1 Rf8-e8 Bh6xg7 Kg8xg7 Nf3-g5 Nh7-f6 (1) >00:00:02 6.00 0.54 Ra1-e1 Ra8-e8 Bh6xg7 Kg8xg7 Nf3-h4 Nh7-f6 (2) >00:00:02 6.01 0.55 Bh6xg7 Kg8xg7 Ra1-d1 Nh7-f6 Qd2-g5 (2) >00:00:03 6.08 0.55 e4-e5 (3) >00:00:06 6.08 0.98 e4-e5 c5-c4 e5xd6 Nb7xd6 Bh6xg7 Kg8xg7 Nf3-e5 (3) >00:00:27 7.00 1.13 e4-e5 b5-b4 Bh6xg7 Kg8xg7 Ra1-e1 Ra8-e8 e5xd6 (7) > >>And another from 1971, Smyslov-Adorjan, Amsterdam I >> >>r1b2k1r/pp2p2p/5pp1/1n1NB3/8/1P4P1/P1P4P/2KR3R w - - >> >>I'm sure I waited hours to see if Genius 3 would get this, when I >>first played through it. Also a simple idea -- White will exchange two >>pieces for a rook and two pawns (already a material advantage) after >>which, a human chess player should see at a glance that his two rooks' >>mobility, and the pressure they can put on Black's king and undeveloped >>queenside mean he can 'mop up' the remaining kingside pawns without too >>much trouble: >> >>Nxf6! exf6 Rd8+ Kg7 Bxf6+ Kxf6 Rxh8 Kg7 Rd8 Nc7 Re1 1-0 >> >>Again, none found it within the 5 minutes I allowed (you see I'm getting >>impatient!), except, yes you guessed, LGG 2.0 immediately plays this, >>and for 'all the right reasons'. > > >Rebel10.5 (setting Deep Threats) 2 seconds > > |-----|-----|-----|-----|-----|-----|-----|-----| CCC.EPD bm Nxf6 >8 | *R | | *B | | | *K | | *R | > |-----|-----|-----|-----|-----|-----|-----|-----| 00:00:00 00:00:01 >7 | *p | *p | | | *p | | | *p | > |-----|-----|-----|-----|-----|-----|-----|-----| >6 | | | | | | *p | *p | | Time infinite > |-----|-----|-----|-----|-----|-----|-----|-----| Hash 60 Mb >5 | | *N | | N | B | | | | Engine REBEL10.5 > |-----|-----|-----|-----|-----|-----|-----|-----| >4 | | | | | | | | | anti-GM Off > |-----|-----|-----|-----|-----|-----|-----|-----| System Tiger Off >3 | | p | | | | | p | | Combination Off > |-----|-----|-----|-----|-----|-----|-----|-----| Style Normal >2 | p | | p | | | | | p | Strength Strongest > |-----|-----|-----|-----|-----|-----|-----|-----| Search Deep Threats >1 | | | K | R | | | | R | > |-----|-----|-----|-----|-----|-----|-----|-----| > a b c d e f g h > >r1b2k1r/pp2p2p/5pp1/1n1NB3/8/1P4P1/P1P4P/2KR3R w - - > >00:00:00 1.00 -1.98 Nd5xf6 e7xf6 Be5xf6 (0) >00:00:00 1.05 0.41 Rh1-f1 (0) >00:00:00 2.00 0.11 Rh1-f1 Bc8-g4 Rd1-d3 (0) >00:00:00 2.08 0.20 a2-a4 Bc8-g4 Rd1-f1 Nb5-a3 c2-c4 (0) >00:00:00 3.00 -0.06 a2-a4 Bc8-g4 Rd1-d2 Bg4-f3 Rh1-f1 Bf3xd5 Rd2xd5 (0) >00:00:01 4.00 0.11 a2-a4 f6xe5 Rh1-f1+ Kf8-g7 a4xb5 Bc8-g4 Rd1-d3 (0) >00:00:01 5.00 -0.10 a2-a4 f6xe5 a4xb5 Bc8-f5 Rh1-e1 e7-e6 Nd5-b4 (1) >00:00:02 5.05 0.00 Nd5xf6 e7xf6 Rd1-d8+ Kf8-g7 Be5xf6+ Kg7xf6 Rd8xh8 (2) >00:00:03 6.00 0.11 Nd5xf6 e7xf6 Rd1-d8+ Kf8-g7 Be5xf6+ Kg7xf6 Rd8xh8 (2) >00:00:08 7.00 0.20 Nd5xf6 e7xf6 Rd1-d8+ Kf8-f7 Rd8xh8 f6xe5 Rh8xh7+ (4) > >Ed Schroder > > >>I'm not trying to plug LGG too hard, really. I've watched it do some >>pretty terrible things too! But for some of these 'difficult' moves, it >>really does seem to have a consistent edge over the rest. >> >>Francis Ed, how will Rebel 10.5 be configured for the game vs. GM Rohde? Will you include one of these settings (King Safety / Deep Threat)? This is being played live on ICC, correct? Dave
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