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| Mar-26-10 | | fouard: How does Black NOT win here? Not worthy of a Friday at all. |
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| Mar-26-10 | | tatarch: This puzzle started one or two moves too late for a Friday. |
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Mar-26-10
 | | benveniste: I think this was a Friday Puzzle because we were supposed to find ♕e3. While ♕a1 is boring, it wins just as quickly. |
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| Mar-26-10 | | kevin86: I figured that a forced exchange would do the trick. I just couldn't execute it. |
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| Mar-26-10 | | psmith: I agree with those who say this was too easy for a puzzle marked "difficult". The lines are pretty forcing and there aren't too many of them, and the key is not hard to find. |
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Mar-26-10
 | | Jimfromprovidence: Just a side note to the 35...Re1 36 Qf4 Qa1 Kg1 37 a5 38 f6 line. If 38...gxf6??, then 39 Qg3+ and black loses a rook.
click for larger view |
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| Mar-26-10 | | wordfunph: i got it right 35.Re1 but my problem was the succeeding moves.. |
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| Mar-26-10 | | gofer: <SuperPatzer77>: If it was a fight to the death and every tempo counted then I would be looking for moves like 37 ... a5, but really white is dead as soon as the rooks and queens are off the board.
There is no need to analyse the game further...
White cannot even attempt to take Pa7 or Pc7 as they lose immediately as either pawn can advance to the fifth rank where it cannot be caught by the white king! So I think you advice is sound in a more complex situation but here it smacks of overkill... :-) |
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| Mar-26-10 | | JohnBoy: <JfP: Just a side note...> Already posted is that 38...a4 proceeds toward the win with great dispatch. I suppose you could have also noted that 38...Qc1 loses a queen to 39.Qxc1 - but why bother? Maybe the trap you mention is the whole point behind 38.f6. There is usually some way to screw up a won game... and goodness knows I've found my share. |
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| Mar-26-10 | | desiobu: I also went for 36...Qa1 but 36...Qe3 is slightly better, winning a tempo. |
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| Mar-26-10 | | vanytchouck: The first move is a kind of easy as there is on way for the queen to attack the castle. Furthermore, the f5 pawn preventing the queen from entering the 8th rank, so the rook can participate to the assault. So 35... Re1 threatening 36...Rxf1 # come easily because 36. Rxe1 is impossible. A quick look at 36. Kg1 shows that this is definately not an option as 36...Qe3+ with mate to follow. The white is compelled to protect the rook wich is now ... pined on the 1st rank! Because of the pin, the queen can suffer an attack from the black queen. It's why, 36. Qf3 is forbidden (36...Qxf3 + ! 37. gxf3 Rxf1 + ). So 36. Qf4 and it's there i've started to calculate as deep as i can (wich is not that deep ;-) ). At Qf4, the queen is not protected and compelled to keep an eye on the Rf1. The idea is then "simple" to make the white choose between, the rook, the queen or the mate! Let's see nasty moves from the black queen ...
Moves that attacks the queen:
36...Qb4
36...Qc4
36...Qd4
36...Qe3
36...Qd2
36...Qc1
But now, there is a counter trick, if the Re1 is not protected, the white can then play Rxe1, threatening mate in one! The good moves are moves that both attack the queen while protecting the Re1. 36...Qe3 or 36...Qc1.
36...Qc1
37. Qxc1 and black loses.
36...Qe3 is brutal as there is no square for the Qf4 to stay on the "f" - file.
37. Qc4 Qf2 wins the rook.
One more time a puzzle surprisingly easy for a friday one (maybe i'm improving at last ...). |
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| Mar-26-10 | | turbo231: I gave Rybka a second chance and played her again. In the second game I ended up with 4 queens!! Talk about fun, that was a hoot and holler! And Rybka still had her Rook! So it was 4 queens vs 1 Rook. Please don't tell anyone but I molested her................ and I made her Rook watch at all of the nasty things that I did to her............ after I had my way with her I felt guilty, remorseful, ashamed of the awful things I had done. I couldn't even look at myself in the mirror. But I never touched her Rook. Before anyone gets the wrong idea I'm not a heartless man. I made up for it by giving her a 3 fold repetition draw, with her Rook by her side. |
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| Mar-26-10 | | WhiteRook48: i confused re1 with qe1 |
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| Mar-26-10 | | Brandon plays: The difficulty label confused me a bit because it seems rather straightforward to me. All black has to do is play Re1 Qf4 Qe3 for example and his two extra pawns should win rather easily. Also, other moves win but maybe less quickly. |
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| Mar-26-10 | | MaczynskiPratten: This seems to have been a week of Q and R deflections. CG didn't try using perhaps the most famous (and pretty) of all; O Bernstein vs Capablanca, 1914 (You only need to look at the position before Black's final move). |
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| Mar-26-10 | | A Karpov Fan: got it but the endgame is an easy win anyway. |
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| Mar-26-10 | | MaczynskiPratten: <LordOsiris>; an interesting point about two passed pawns a file apart being immune from attack by a king. This only seems true if they are on their starting squares. As shown, if White's King reaches b7 and captures on a7, c5! wins (or Kxc7, a5!). But if the pawns have advanced to c5 and a5, Kb5! will draw; Kxa5 c4, Kb4 c3, Kxc3. So the pawns would need the help of their own King - not a problem here as Black's K can reach the scene of action as fast as White's. Finally, of course, united pawns on adjacent files are immune even without their King's help (but the K needs to come across to allow them to advance and win). |
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| Mar-26-10 | | JohnBoy: <MaczynskiPratten> - the bit "about two passed pawns a file apart being immune from attack by a king" is this. Suppose that the pawns are at a5 and c5 as you suggest. If the white king is to approach, say to c4, black just plays ...a4. The c pawn is untouchable. The white king can thus never get to b5 unless black has no idea how to win such a position. Your point is a non-issue. |
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| Mar-26-10 | | YouRang: I agree with those who thought this was easier than the typical Friday. The pawn situation alone immediately suggests that black wins by exchanging off material, and ...Re1 is right to the point. |
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| Mar-26-10 | | caissafan1963: I agree that Black wins easily, and this is unworthy of a Friday puzzle. Doesn't even deserve 3 stars IMO. 36. ... Qa1 is just as effective and forcing as Qe3, and anyone over 1300 should be able to find it. |
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| Mar-26-10 | | riverunner: You say tomato, I say tomahto. |
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| Mar-26-10 | | Shadowling: @ superpatzer + patriot
Thank you for your insight, I completely agree that g3 is not the best move, but once you see that other defenses simply lose, then you might as well attempt to swindle your opponent :) In fact if black just retreats the rook than f6 creates mate threats on both g7 and c8 which it appears black has no way of meeting cheers! |
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| Mar-26-10 | | Patriot: <Shadowling> You make a great point. It is possible to swindle a win there. Your idea demonstrates that it's usually best to trade down into an easily winning king and pawn endgame to avoid complications. So perhaps 35...Re1 36.g3 Rxf1+ 37.Kg2 Qf3+ 38.Qxf3 Rxf3 39.Kxf3 is best. Sometimes strong chess programs will say that hanging on to an extra piece is better but computers don't get mated so easily--humans can! And if you're on the losing end, you may as well try something that gives you a chance for a swindle. Good job! |
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| Mar-26-10 | | muralman: Wow!!! This makes five in a row. Thinking this one out was entertaining, and useful. I have to wonder often, why players trap their king behind pawns late in the game. |
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| Mar-26-10 | | Lord Osiris: absolutely not mac. the idea of the a and c pawns protecting each other is that one cant be captured without the other queening. it is true that if the white king got to b5 while both of blacks pawns were on a5 and c5 then white has them both, however the idea is to not get into that situation in the first place. lets look for example at an empty board for ease sake and have the black pawns on a5 and c5 with the white king encroaching on c4 with black to move. a4 stops white in their tracks. if he takes the c pawn or moves to b5 blacks a pawn will queen. both b4 and b3 are cut off because of the black pawns attacking those squares so white is forced to play Kc3. black then makes a king move closer to the action. white can play after this Kb2 but then c4 levels the pawns again and keeps the king from coming between them. its classic endgame theory and not something for debate. the pawns will either queen without the black kings help or the black king will be there shortly to aid them. |
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Kibitzing
sac: 36...Qe3