Author: Ricardo Gibert
Date: 06:37:49 05/22/00
Go up one level in this thread
On May 22, 2000 at 01:59:12, Bruce Moreland wrote: >On May 21, 2000 at 22:59:20, Michael Neish wrote: > >> >>>There are a couple of obvious things. >>> >>>1. Bg4 is silly. After f3, it has to retreat. >> >>Thanks for the reply. Do you think Fritz played that move because it thought >>that f3, driving the Bishop away, would weaken White's Pawn structure? If so, >>it would have considered it a worthwhile sortie. >> >>About locked positions -- there are certain themes that seem to recur in >>positions of this kind. The sort of locked positions one gets coming out of >>certain openings seem to be very similar to each other (and long lasting), >>similar and long-lasting enough that I think one could check for the occurrence >>of these structures before entering Search(), in PreEval() and change some >>parameters accordingly, such as command of space, King Safety bonuses for the >>proximity of the enemy's Pawns, mobility factors for Bishops blocked behind >>their own locked Pawns, etc. It seems a very simple idea -- do you think it >>would work? I'm trying to do something along these lines (for simpler >>positions, mind you), but it's too early to tell whether they have a net >>positive effect. >> >>>2. after f4, black needs to play ef, rather than allowing the pawn to be >>>pushed to f5. After f5, white has lots of space on the kingside, and the pawn >>>roller is hard to stop. Black, meanwhile, has a locked center to play with and >>>has a hard time defending on the kingside with so little space there. >> >>Seems very sensible. But after f5 can Black still hold the game? If so, how? >> >>Cheers, >> >>Mike. > >After 13. f5 black is dicked, because all the eventual open lines are going to >come at a time of white's choosing, and they will all favor white. After that >move, black is the golf ball, it is teed up, and white is Tiger Woods. You have a knack for describing and explaining things very well. I'm not the only one note this. Have you considered writing a book on computer chess? I would certainly buy such a book. > >I think black played without plan starting with 9. ... Bg4. Perhaps it got >confused because it didn't see a good pawn break, and perhaps it didn't help >that white's structural king safety look poor. > >What is black trying to do? Black wants to take advantage of the fact that >white's king hasn't castled. But black doesn't do this, black fiddles around >and lets white get a hammer lock on the k-side, the center, and the q-side. You >can't do that and win. > >I think the game is lost for black after 13. f5. > >Around move 12 or so black needs to break the position open and make white think >about his king safety. Black doesn't do this, and instead fritters around >during the crucial moment during which white can remove black's potential ... f5 >pawn break. I think 12. ... b6 was a complete stinker since f4 is coming. >Black needs to deal with this, since black absolutely cannot allow f4 followed >by f5. > >Assuming that 12. ... b6 is played, Bob has suggested 13. ... exf4 in response >to 13. f4. Mine won't play 13. ... exf4, because it is frightened about the >open lines into its own position. If it was forced to deal with this position, >it would mess up and lose quickly. Perhaps it's a bad plan anyway, because >white might be able to consolidate his center and his king, but perhaps black >can get in ... f5 and do some chopping. Regardless, mine won't let the g-file >open into its king like this, and I think that's a rational fear, in the general >case, for a program, so I'm not coming down on it harshly. It'd be a matter of >choosing which way it wants to screw itself up, and I don't mind that it would >pick the wrong one. > >I hold out more hope for the possibility of avoiding the position by avoiding >12. ... b6. I had the idea that 12. ... Ne8, intending to meet 13. f4 by 13. >... f5, could be the way to go. I set up the position before black's 12th move >and I was happy that mine would adopt this plan. That's how I want it to play, >even if the plan is bad. I want it to understand that you do not let a human >play f4 and f5 against you when you are castled k-side and there is an e4/e5 >ram. Fritz could use this knowledge too, I think. > >This game isn't particularly hard to improve upon because anything has to be >better than what happened in the game, and that is important to remember when >deciding whether you should declare yourself to be smarter than Fritz. But I >think this plan would help prevent black from getting so badly attacked, and >might cause white to regret his king safety choices. > >I am about a 2000 USCF player so take what I say with a grain of salt. > >bruce
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