Author: James T. Walker
Date: 09:13:42 01/14/99
Go up one level in this thread
On January 14, 1999 at 11:35:34, blass uri wrote: > >On January 14, 1999 at 10:44:31, Laurence Chen wrote: > >>On January 14, 1999 at 10:12:44, blass uri wrote: >> >>> >>>On January 14, 1999 at 08:49:37, James T. Walker wrote: >>> >>>>On January 14, 1999 at 07:36:07, blass uri wrote: >>>> >>>>> >>>>>5rk1/1B6/4p1pp/2b3p1/3qP3/6P1/1P2QPP1/5RK1 w - - 0 1 >>>>> >>>>>This is a position from the game Junior5-FM Boris Mariasin(The result was draw) >>>>> >>>>>Junior5 and other programs evaluating it as an advantage fo white because they >>>>>do not know to count Attackers-Defenders >>>>> >>>>>Is there a progam with a more realistic evaluation (small advantage for black or >>>>>at least less than 0.2 pawn for white)? >>>>> >>>>>Uri >>>>Hello Uri, >>>>I'm a very bad chess player so I don't understand what is happening in this >>>>position. I see that white is up a pawn which is about a point. So where is >>>>the advantage for black? >>> >>>The advantage of black is that the black pieces attack f2 and all the white >>>pieces must defend f2. >>> >>>White has no plan to do a progress in the position when black can play h5,g4,h4 >>>with an attack. >>> >>>I am not saying that black is winning but the evaluation should be at least >>>equality. >>> >>>The problem of computers is that they do not count attacker-defemsors of f2 and >>>cannot understand that the fact that white is passive give black at least >>>equality >>> >>>Uri >>Uri can you prove this position is equal? Really, you are saying that because of >>the opposite color bishops in the position. Yet, let me ask you then, what can >>Black do? Black is down a pawn, and White has a passed pawn on the Queenside, >>that is why the +1.xx evaluation. So the position is not equal, the assessment >>is correct, because White can break the pin of f2 easily, and if Black attempts >>to advance the Kingside pawns, it gets in big trouble, it exposes the King to >>White pieces. > >White cannot break the pin easily >The game was drawn after >26.Ba6 Kg7 27.Bb5 h5 28.Bc4 e5 29.b3 g4 30.Bd5 h4 31.Kh2 Qc3 32.f3 gxf3 33.gxf3 >hxg3+ 34.Kxg3 Be3 35.Rh1 Bf4+ 36.Kg2 Rc8 37.Qf2 Be3 38.Qa2 Qc2+ 39.Qxc2 Rxc2+ >40.Kh3 Bf4 41.Bc4 and the sides agree to a draw. > >What white could do? *Fritz has this at +.50 for white. Nimzo calls it +.58 for white. Since white has a pawn up and poor position this seems correct to me. The black e pawn is weak and needs defending after Ba6 and then either Qc4 or Bc4. Qc4 may force swapping queens. Bc4 followed by b3 saves the b pawn. There seems to be a lot of chess to be played yet with options on both sides. A +.50 advantage is not winning, it's just an advantage. The fact this game ended in a draw is not a surprise to me but in the mean time white still has the extra pawn. > >The only plan for white to get out of the pin is g4 g3,Kg2 but this weakens the >white king. > *Very seldom in chess is there a "only plan". I don't understand the Kg2 since g2 has a pawn on it. >After g4 Junior wants to play Rb8 and black gets the pawn back. *If the rook moves off the f file that kills the pin(Attackers vs Defenders). Jim Walker >Uri
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