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Uri Blass

Joined: 08 Mar 2006
Posts: 5958
Location: Tel-Aviv Israel

Post subject: Re: An instructive problem    Posted: Wed May 30, 2007 9:52 pm

 mambofish wrote: I am seriously impressed that you admit checks in the qsearch! How do you know which move is a check without searching? I did try that once but abandoned it as too costly Leaving that aside though, the problem I have with this explanation is simply that movei's own analysis doesn't appear to support your conclusions. The fact that movei considers the best response to 3 .. f6 to be a sequence of moves starting with Qh8+ must surely indicate it hasn't seen the consequence of g6. Otherwise that line would terminate much earlier. Please understand that I intend no disrespect by this - I am sure that movei would eat ermintrude for breakfast. But I don't accept the explanation that some sort of static analysis after g6 is somehow directing movei to find Bg4 as a better move Kind regards Vince

1)I explained that I also have pruning and not only checks in the qsearch so movei simply did not search after g6 so it did not get into the qsearch.

The checking line was not pruned but g6 is a quite move so it did not cause extension and together with the pruning that I do after g6 based on evaluation black moves were not searched.

2)I know that a move is check without searching simply based on the from and the to square of the piece(in most cases they tell me that it is not check).

Movei can solve wac number 1 in depth 2 thanks to checks in the qsearch.

New game
2rr3k/pp3pp1/1nnqbN1p/3pN3/2pP4/2P3Q1/PPB4P/R4RK1 w - - 0 1

Analysis by Movei00_8_403:

1.Nf6-e8
³ (-0.69) Depth: 1 00:00:00
1.Nf6-e8
³ (-0.39) Depth: 2 00:00:00
1.Nf6-e8
² (0.31) Depth: 2 00:00:00
1.Nf6-e8 Rd8xe8 2.Ne5xf7+ Be6xf7 3.Qg3xd6
+- (2.27) Depth: 2 00:00:00
1.Qg3-g6
+- (2.28) Depth: 2 00:00:00
1.Qg3-g6
+- (2.57) Depth: 2 00:00:00
1.Qg3-g6 f7xg6 2.Ne5xg6#
+- (#2) Depth: 2 00:00:00
1.Qg3-g6 f7xg6 2.Ne5xg6#
+- (#2) Depth: 2 00:00:00

(, 31.05.2007)

Uri
 Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First
Subject Author Date/Time
mambofish Fri May 25, 2007 6:23 pm
Pradu Kannan Fri May 25, 2007 7:31 pm
Gerd Isenberg Fri May 25, 2007 8:05 pm
Vincent Diepeveen Sat May 26, 2007 7:19 pm
mambofish Wed May 30, 2007 12:47 am
mambofish Fri May 25, 2007 8:10 pm
Vincent Diepeveen Sat May 26, 2007 7:17 pm
Uri Blass Wed May 30, 2007 12:57 pm
mambofish Wed May 30, 2007 3:24 pm
Uri Blass Wed May 30, 2007 4:06 pm
mambofish Wed May 30, 2007 9:02 pm
Alessandro Scotti Wed May 30, 2007 9:35 pm
mambofish Wed May 30, 2007 10:00 pm
Alessandro Scotti Wed May 30, 2007 10:14 pm
Re: An instructive problem Uri Blass Wed May 30, 2007 9:52 pm
mambofish Wed May 30, 2007 10:40 pm

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