Aug-04-10
 | | Ulhumbrus: With the move 46 Be4? Arkell goes too far trying to win. 46 Bxa5 may draw, and for that matter, 44 a5 or 44 bxc5 instead of 44 b5 or else 43 Kd4 instead of 43 Bf3 may also gain White no more than a draw. However a draw is a fair result, if we assume that White's overall advantage (the bishop pair in return for doubled pawns) is insufficient to win. With 45...bxa5! Black accepts the offer and with 46...a4! Black accepts the challenge which White has presented him by attacking the g6 pawn, and takes the risk. Tymrakiewicz's play suggests the following lesson: Unsound play is to be answered by uncompromising play, and if the opponent goes too far and makes an unwarranted concession, the player is advised to take advantage of it. With the move 82...Ke4! Black offers the c4 pawn.On 83 Kxc4 Kd3 84 Kb4 Kc2 85 Ka3 Kb1 White's King is unable to attack the square a1 and so is unable to help the White bishop to keep Black's a pawn back. This variation offers a lesson in a part of the technique of this ending. |
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| Aug-04-10 | | ounos: 82. ...a1Q would also trivially win (black would protect his a pawn with the bishop, and promote his h pawn with the help of the king) |
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| Aug-04-10 | | ounos: (Now I saw the continuation of the game) - which is equivalent to what happened anyway, so with 82. ...Ke4 he was just buying his time before going for the obvious. |
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Aug-05-10
| | Ulhumbrus: <ounos: 82. ...a1Q would also trivially win (black would protect his a pawn with the bishop, and promote his h pawn with the help of the king) > I overlooked this possibility, but upon further consideration it does not in fact seem to win because following 82...a2-a1/Q+ 83 Bxa1 Kxg5 84 Kxc5 White can give his bishop up for the h pawn, after which Black is left with the a pawn and the wrong bishop, the white squared Queen's Bishop which does not control the black coronation square a1. |
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Aug-05-10
 | | SwitchingQuylthulg: 82...Kf5 with the idea 83...h5 looks like a genuine alternative win though. |
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Aug-05-10
 | | whiteshark: <King's Indian Defense: Normal. King's Knight Variation> Grünfeld surely would disagree / turns in his grave. |
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Aug-05-10
| | Ulhumbrus: <SwitchingQuylthulg: 82...Kf5 with the idea 83...h5 looks like a genuine alternative win though.> Not quite: 83 Kxc4 Ke4 84 Kc4! Ke3 85 Kb4 Bc2 86 Ka3 Bb1 87 Kb2 and White draws. If the White King reaches b2, White can give his bishop up for Black's passed pawn on the King side and still draw. |
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| Aug-05-10 | | ounos: <Ulhumbrus> oops, you are right, that would leave the wrong bishop, good catch :) |
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Aug-05-10
| | SwitchingQuylthulg: <Ulhumbrus> But if Black plays 83...h5 as I said, exactly how does White go about sacrificing his bishop for the h-pawn? e5 is controlled by Black's king. |
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Aug-06-10
| | Ulhumbrus: <SwitchingQuylthulg: <Ulhumbrus> But if Black plays 83...h5 as I said, exactly how does White go about sacrificing his bishop for the h-pawn? e5 is controlled by Black's king.> You are right. I assumed wrongly that 82...Kf5 lost time towards 82...Ke4 for nothing, but it doesn't. White may have nothing better than to transpose into the game by 83 Bg7 Ke4 84 Bh8 Be2+ when Black wins a move later than in the game. |
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Aug-06-10
| | SwitchingQuylthulg: <Ulhumbrus> I don't think Black even has to transpose - 83...Kxg5 should be a simple win. |
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Aug-06-10
| | Ulhumbrus: <SwitchingQuylthulg: <Ulhumbrus> I don't think Black even has to transpose - 83...Kxg5 should be a simple win.> So it seems. White's King does not seem to stop the a pawn in time to free White's B to stop the h pawn. |
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Aug-08-10
 | | GIAaron: After 43 Bf3? c5! it is only a draw.A better way to keep the advantage was 43 a5 with some winning chances |
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Aug-08-10
| | GIAaron: But still, to blunder away the game completely was foolishness of course.
The simplest way to avoid doing that was 47 hg hg 48 Bg6 a4 48 Ba5 etc |
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Aug-16-10
| | Ulhumbrus: On 47 hg hg 48 Bg6 a4 48 Ba5 Black has a choice between possibly two winning moves, 48...Ne5 forking the Bg6, g4 pawn and the point c4 and 48...Nb6 keeping the White QB out of c3 on pain of the fork ...Nd5+ |
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Sep-15-10
| | GIAaron: 48...Ne5 49 Bd3 should be ok for W,but 49..Nb6 is a tougher move.
A line such as 50 Bc3 Nd5+ 51 Kd2 Nxc3 52 Kxc3 a3 53 Kb2 c4 should be a draw though I think,although the computer mis-assesses this as winning for B,overlooking the wrong Rooks pawn drawinmg defence after Black plays c2 forcing Bxc2 |
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