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  1. 12 May '08 16:24
    I was convinced Weyerstrass was heading for his first loss on this site in this game: Game 4304510
    However xprad allowed a perpetual.

    When I looked at the game some time before the end I saw the fairly obvious perpetual threat straight away and thought xprad could avoid it with 40. ... Qe4+, which allows the black queen to block checks on the h-file. E.g. 40. ... Qe4+; 41. Kg1 Rxg8 42. Rxa2 (not 42.Qe8+ Rg8; 43.Qh5+ Qh7)

    Is Black winning after this, or is White's e-pawn too dangerous?

  2. 12 May '08 17:35 / 2 edits
    From the diagram position, how about Rf2?

    * EDIT * nevermind - I was thinking Qxe5 Bxg7 Qxg7? with a perpet, but Rxg7 looks tough to beat.
  3. Standard member Dragon Fire
    Lord of all beasts
    12 May '08 17:44
    Originally posted by DawgHaus
    From the diagram position, how about Rf2?

    * EDIT * nevermind - I was thinking Qxe5 Bxg7 Qxg7? with a perpet, but Rxg7 looks tough to beat.
    Also its black to move in the diagrammed position.
  4. 12 May '08 18:51
    Sorry, I mucked up the link to the game: Game 4304510

    In the diagrammed position, a tempting but wrong plan for Black is 42. ... Qb1+ 43.Qf1 Qxa2? which allows a perpetual again after 44.Bxg7+ Rxg7 45.Qf8+ etc.

    However Black must be winning after 42. ... Qb1+ 43.Qf1 Qxf1+ 44.Kxf1 b5
  5. Standard member Yuga
    Renaissance
    12 May '08 20:50 / 3 edits
    Originally posted by Fat Lady
    E.g. 40. ... Qe4+; 41. Kg1 Rxg8 42. Rxa2 (not 42.Qe8+ Rg8; 43.Qh5+ Qh7)
    In your line Rxc6 instead of Rxa2 and white threatens Rh6+.

    I checked the 40…Qe4+ lines with Fritz8 and Black cannot do better than a draw by perpetual. Black’s first priority is to cover g7 and can do so two ways: by Rxg8 or Qxe5. If Black plays the latter white has Re2-e7 or Re2-f2-f4 resources depending on the line and has at least a perpetual in all lines.

    So 40…Qxe5 warrants consideration and I have not yet find definitive winning lines for Black after Rxc6 Bb1 Bxg7+ Qxg7 Qxg7 Kxg7 Bxd5 Ra6 Rc1. I think this line is best and white's moves forced.

    Black to move.



    Playing through the lines, this looks like a draw.

    I expect there are improvements to be found earlier in the game.
  6. 13 May '08 18:31
    Originally posted by Yuga
    In your line Rxc6 instead of Rxa2 and white threatens Rh6+.

    I checked the 40…Qe4+ lines with Fritz8 and Black cannot do better than a draw by perpetual. Black’s first priority is to cover g7 and can do so two ways: by Rxg8 or Qxe5. If Black plays the latter white has Re2-e7 or Re2-f2-f4 resources depending on the line and has at least a perpetual in all li ...[text shortened]... es, this looks like a draw.

    I expect there are improvements to be found earlier in the game.
    A draw? I personally would definitely choose Black here, aiming to block the wPs with the bK and bB while attempting to push the a- and b-pawns. But I bow to your superior knowledge... for now. Anyone spare a few minutes explaining why this won't work?