Author: Peter McKenzie
Date: 12:41:20 06/23/00
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On June 23, 2000 at 13:28:36, Bruce Moreland wrote: <snip> >>>And here we are after Rh7: >>>[D] 2b5/7r/2kBp1p1/p2pP1P1/2pP4/1pP3K1/1R3P2/8 w - - acd 20; acn 174240961; acs >>>1000; ce -321; id "WAC.230 after Rh7"; pv Rb1 a4 Kg4 Bb7 Bc5 Ba6 Ba3 Rh2 Kg3 Rh5 >>>Kg4 Kd7 Bc5 Bb5 Rb2 Rh1 Ba3 Rh2 f3; >>> >>>It seems from a fairly deep evaluation that the 'aftermath' of both a4 and Rh7 >>>is worse for white than after Rb4. So the burning question is, is everybody >>>really positive that they have been getting the wrong answer all these years, or >>>are we just wearing the emporor's new clothes? >>>;-) >>> >>>Equivalently, are we really sure that a4 and Rb7 are not just as good or even >>>superior? If not, why not? >> >>Are you analyzing these positions with your own mind or are you just letting a >>computer look at them with a shallow search? >> >>The problem contends that black can't break through by normal means. Whit is >>going to play Ba3 to blockade the a-pawn, and can prevent penetration on the >>k-side. >> >>In the solution, black plays ... Rb4, threatening ... Ra4 and ... Ra2. If white >>takes the rook, the pawns advance and win. >> >>Is anything you are saying challenging either aspect of this? >> >>bruce > >The only alternate plan that I can find is 1. ... Rh7 2. Rb1 and now it is >possible to sacrifice with 2. ... b2 3. Rxb2 Rb7, which are beyond my skill to >understand, at least while my wife is yelling at me to mow the lawn, but which >seem a little challenging for white. After 1...Rh7 2.Rb2 b2 3.Rxb2 Rb7 white draws by 4.Rxb7. Blacks only way of making progress is to march the King to b3, but as soon as black plays Ka4, white plays Bc7 attacking the pawn on a5 thereby preventing Kb3. For example 4.Rxb7 Bxb7 5.Kf4 Kb5 6.Ke3 Ka4 7.Bc7 = Of course, if black tries a4, Ba3 locks it all up. > >It may be possible to delay playing ... b2. > >I'm not saying very much here, but I don't think your computer is doing any >better. > >bruce
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