Author: Vincent Lejeune
Date: 13:52:37 08/19/99
Go up one level in this thread
On August 19, 1999 at 15:53:38, Dann Corbit wrote: >On August 19, 1999 at 09:27:07, Vincent Lejeune wrote: > >>On August 18, 1999 at 14:33:50, Dann Corbit wrote: >> >>>On August 18, 1999 at 13:01:52, Dann Corbit wrote: >>> >>>>On August 18, 1999 at 12:33:59, Vincent Lejeune wrote: >>>> >>>>>Position n°100 of the Aemis 1 test is reported as unsolved at Shep's Site. >>>>> >>>>>I've test it with Rebel10c (stronger setting), it find the keymove (Ng4!) after >>>>>21 sec on my Celeron@450 Mhz with 100 Mbyte hashtable. >>>>OK, dumb question, is Ng4 actually better than Qh4 which has a very good eval? >>>Here are some C.A.P. records. They favor Qh4. If that is wrong, I suspect one >>>of two things: >>>0. Zugzwang >>>1. Positional >>> >>>5bk1/1r4r1/1pRp1n2/p2Pp2p/P3Pp2/1QB2PqN/1P2BNp1/6K1 b - - acd 13; ce 144; pv Qh4 >>>Bxe5 dxe5 d6+ Kh7 Qe6 Rbf7 Rc8 Nd7 Bb5 Nc5 Qxe5 Rf6 Rc6; pm Qh4; bm Ng4; id >>>"Aemis Test Suite No.100"; >>> >>>5bk1/1r4r1/1pRp1n2/p2Pp2p/P3Pp2/1QB2PqN/1P2BNp1/6K1 b - - acd 15; acn 622115281; >>>acs 5001; ce 57; pv Qh4 Bxe5 dxe5 d6+ Kh7 Qe6 Rbf7 Qxe5 Nd7 Qd5 Kh8 Bd3 Nf6 Qd4 >>>Qg3 Bc4; >> >> >>Rebel 10c analysis: >> >>After Qh4, 6 min, 50 Mnodes, best move Rc6xd6, score : -1.90 >>After Ng4, 5 min, 35 Mnodes, best move f3xg4 , score : -3.49 >> >>The theme of the position is : strong attack (queen+2 passed pawn+rook) on white >>king. >> >>It's strange that crafty don't see that on depth 15 >> >>What's the crafty's evaluation when you play 1..Ng4 on board ? > >First, the bare records: >5bk1/1r4r1/1pRp4/p2Pp2p/P3Ppn1/1QB2PqN/1P2BNp1/6K1 w - - acd 13; acn 675423462; >acs 3601; c0 "After Ng4"; ce -8; pv fxg4 hxg4 Bxg4 Rxg4 Nxg4 Qxh3 Nf2 Qe3 Qd1 f3 >Bd2 Qd4 Qxf3 Qxd2 Qxg2+; > >5bk1/1r4r1/1pRp1n2/p2Pp2p/P3Pp1q/1QB2P1N/1P2BNp1/6K1 w - - acd 15; acn >290699249; acs 3601; c0 "After Qh4"; ce -182; pv Bxe5 dxe5 d6+ Kh7 Qe6 Rbf7 Qf5+ >Kh8 Qxe5 Nd7 Qd4 Qf6 Qd5; > >Partial list of crafty's evaluation after Ng4 shows that disaster does not show >up till ply 13 (which would be 14 from previous position) and how bad it really >is does not get completed until over one hour! On ply 13, after 1:48, crafty >saw some kind of disaster, but did not "fully comprehend" how bad it was even >after one full hour. I am not sure why crafty 'hit the wall' so hard here. I >plan to send an email to the crafty list server to discuss this particular >position. > >s depth time score variation (1) > 8 1.80 0.39 1. fxg4 hxg4 2. Bxg4 Rxg4 3. Nxg4 Qxh3 > 4. Nf2 Qf3 5. Rxb6 > 8-> 2.12 0.39 1. fxg4 hxg4 2. Bxg4 Rxg4 3. Nxg4 Qxh3 > 4. Nf2 Qf3 5. Rxb6 > 9 2.51 -- 1. fxg4 > 9 41.34 -0.27 1. fxg4 hxg4 2. Bxg4 Rxg4 3. Nxg4 Qxg4 > 4. Nf2 Qe2 5. Qc4 Qf3 > 9-> 42.33 -0.27 1. fxg4 hxg4 2. Bxg4 Rxg4 3. Nxg4 Qxg4 > 4. Nf2 Qe2 5. Qc4 Qf3 > 10 46.75 0.06 1. fxg4 hxg4 2. Bxg4 Rxg4 3. Nxg4 Qxg4 > 4. Nf2 Qe2 5. Qd1 Qxd1+ 6. Nxd1 f3 > 7. Nf2 > 10-> 48.11 0.06 1. fxg4 hxg4 2. Bxg4 Rxg4 3. Nxg4 Qxg4 > 4. Nf2 Qe2 5. Qd1 Qxd1+ 6. Nxd1 f3 > 7. Nf2 > 11 55.19 -0.33 1. fxg4 hxg4 2. Bxg4 Rxg4 3. Nxg4 Qxh3 > 4. Nf2 Qe3 5. Qc2 f3 6. Qd2 Qxd2 7. > Bxd2 > 11-> 59.62 -0.33 1. fxg4 hxg4 2. Bxg4 Rxg4 3. Nxg4 Qxh3 > 4. Nf2 Qe3 5. Qc2 f3 6. Qd2 Qxd2 7. > Bxd2 > 12 1:19 -0.08 1. fxg4 hxg4 2. Bxg4 Rxg4 3. Nxg4 Qxh3 > 4. Nf2 Qe3 5. Qd1 f3 6. Bd2 Qd4 7. > Qxf3 Qxd2 8. Qxg2+ > 12-> 1:26 -0.08 1. fxg4 hxg4 2. Bxg4 Rxg4 3. Nxg4 Qxh3 > 4. Nf2 Qe3 5. Qd1 f3 6. Bd2 Qd4 7. > Qxf3 Qxd2 8. Qxg2+ Crafty have a littler problem to see 4..Qg3!! May be beacuse it's a still(anti-nullmover) move ... [snip]
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