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| Feb-29-12 | | LoveThatJoker: Cool. An Aagaard puzzle.
I'm liking <27. Rxc7+ Kxc7> (27...Kb8 28. Qxb7#; 27...Kd8 28. Qxb7 wins because of multiple threats like Qb8#, Qc8#, Rc8#, even Rd7+) <28. Re7+ Kd8>
[28...Kb8 29. Qxb7#; 28...Kc8 29. Qxb7+ wins; 28...Kb6 29. Rxb7+ Kc5 (29...Ka6 30. Qc6+ and 31. b4#; 29...Ka5 30. Qc6 Qg4 31. b4+ Qxb4 32. cxb4#) 30. d4+ Kc4 31. Qc6#] <29. Qxb7> and wins as Black cannot stop dual threats of 30. Qd7# and 30. Qc7# LTJ |
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Feb-29-12
 | | morfishine: White kicks in the door with <27.Rxc7+ Kxc7 28.Re7+>...after King-any, White plays <29.Qxb7> and Black is in a mating net |
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Feb-29-12
 | | agb2002: The material is even.
Black threatens 27... Qxg3.
There is no black piece between the black king and the white rooks. Therefore, 27.Rxc7+ and mate soon. |
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| Feb-29-12 | | gofer: For some reason this took ages. I didn't see the rook reloader
on the seventh. I looked at squeezing out a win against a 2R v
2R ending after trading queens and getting both white rooks on
the seventh... ...but when you see it, it is obvious! Forced mate in 5, so black probably resigns immediately. <27 Rxc7+ ...>
27 ... Kb8 28 Qxb7#
27 ... Kd8 28 Qxb7 mating
<27 ... Kxc7>
<28 Re7+ ...>
28 ... Kb8 29 Qxb7#
28 ... Kc8 29 Qxb7+ Kd8 30 Qc7#/Qd7#
28 ... Kd8 29 Qxb7 mating
<28 ... Kb6>
<29 Rxb6+ ...>
29 ... Kc5 30 b5#
29 ... Ka6 30 Qc6+ Ka5 31 g4#/Rxa7#/Qb5#
<29 ... Ka5>
<30 Qd5+ ...>
30 ... Ka6 31 Qb5#
<30 ... Ka4>
<31 Rxa7#/Rb4#/Qb5#> Time to check... |
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| Feb-29-12 | | Limpin Kt: <gofer> i too took a lot of time to solve this. I examined the following candidates at my first glance
27. e8
27. b7
and then i tried to <trap the black queen,> then <deflection of f pawn and sac on f8>... None worked. Then completing the cycle i returned to the idea of queen sac on b7- then saw rook sac on c7. 27.c7! Wins. The puzzle needs no further calculation as the queen and rook on 7th rank are very powerful when they threaten mate- <i remembered the similarity of 4th game of worldchampionship- anand- topalov where the indian scarcificed his kt on h6 and the resultant position was based on similar theme.> good day to al! :) |
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Feb-29-12
 | | Memethecat: Just last night on LoveThatJoker chessforum I was talking about a Fischer book I read about back rank mate, but at the time I thought the exercises were aimed at total beginners, definitely beneath me, but I ploughed through & it has stood me in good stead. Again today, as soon as the page opened I knew the answer, because of those simple exercises. <27Rxc7+ Kxc7 28Re7+ Kd8 29Qxb7> mate is unavoidable <27Rxc7+ Kxc7 28Re7+ Kb6 29Qxb7+ Kc5 30Rc7#> <27Rxc7+ Kxc7 28Re7+ Kb6 29Qxb7+ Ka5 30b4+ Ka4 31Qa6#> <27Rxc7+ Kd8 28Qxb7 ~ 29Qb8#> ***
Well a bit different but the same, in fact my line is much better.
Don't huff & puff that where a joke.
Cheers Bobby, you nutter/genius. ^.^ |
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Feb-29-12
 | | lost in space: Got it in a few seconds. Nothing to add to the posts already done. |
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| Feb-29-12 | | LoveThatJoker: <Memethecat> Bobby Fischer Teaches Chess is a classic indeed! LTJ |
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Feb-29-12
| | Memethecat: <NM JRousselle: Once again, the 2 piece rule comes into effect.> what's the 2 piece rule? <LJLMETAL: White missed a checkmate in 2> Black missed a chance to resign gracefully <viking78: Well I rushed a bit my C line but I guess I am right today. I have a question though... My 29.Qxb7 is weaker then 29.Rxb7, or both are same good?> Both work equally well, I prefer Qxb7+, but I can't say why. |
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| Feb-29-12 | | VincentL: "Medium/Easy".
My idea here is 27. Rxc7+. Then after 27.....Kxc7 28. Re7+ followed by Qxb7 and mate with
Qc7
No time to write up a proper post.
Letīs check. |
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| Feb-29-12 | | deadlyduck: Didn't get it at all and am kicking myself when the solution is presented :-( I was looking at trying to infiltrate the Black Q-side with moves like 27. Qe3 (as either 27..Qxg3; 28.Qxa7 or 27.. b6; 28. Qf3 Kb8;29. Qc6 both look disastrous for Black) but I couldn't find a totally clean follow on after 27..Kb8; 28.Qe4 [intending to go to b4 and manoeuvre the Queen a square at a time to exploit the relatively lightly defended Q-side]. I think Black can probably just about defend in this line however by playing 27..Rg7 |
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Feb-29-12
| | Memethecat: <LTJ> Thanx, I'd forgotten the title. But I remember its a strange design. For anybody that doesn't know the book, you read it front to back but only the text on the right page, at the end you turn the book upside down & read it back to front. ^.^ |
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Feb-29-12
 | | The HeavenSmile: 29. Qxb7+ is faster |
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Feb-29-12
 | | Patriot: 27.Rxc7+ looks like a winner. 27...Kxc7 28.Re7+ and white can invade with the queen on b7. |
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| Feb-29-12 | | LoveThatJoker: <Memethecat> So true! I had forgotten about the upside down element to that book! :D That sure brings back good memories.
LTJ |
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Feb-29-12
| | The HeavenSmile: great post <once> |
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| Feb-29-12 | | CHESSTTCAMPS: In this middle-game attacking position, material is even, but the white rook on the 7th provides a winning advantage (although with black to move, the rook could be neutralized with 27... Rg7). This is a basic, forcing sac leading to mate. 27.Rxc7+ and now:
A) 27... Kb8 28.Qxb7#
B) 27... Kd8 28.Qxb7 Qe6 29.Qb8+ Qc8 30.Qxc8#
C) 27... Kxc7 28.Re7+ Kb6 29.Qxb7+ Ka5 (Kc5 30.Rc7#) 30.b4+ Ka4 31.Qa6# C.1) 28... Kd8 (Kc8 29.Qb7+) 29.Qxb7 followed by 30.Qc7# Most likely, black resigns immediately. |
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| Feb-29-12 | | KingV93: At first I liked 27.e6 , missing 27...g4, bummer. Seeing the solution after checking, 27.xc7, was some consolation. I do love those 'kicking in the door and spraying the room with gunfire endings'. Very nice. |
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| Feb-29-12 | | Penguincw: For some reason, I wasn't paying much attention to the queenside. |
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| Feb-29-12 | | rudiment: Thought for a while that 28... Kd8 might escape, but no. 28... Kd8 29. Qxb7 Qe6 (Hoping for 30. Rxe6 Re8 and some semblance of a fightback)30. Qc7#. |
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Feb-29-12
 | | David2009: J Aagaard vs P A Rasmussen, 1996 White 27? There is a snap mate: 27.Rxc7+ Kxc7 (27...Kd8 Qxb7 is worse) 28.Rd7+ Kb6 (or 28...Kd8 Qxb7 forces mate rapidly) 29.Rxb7+ and now 29...Kc4 30.b4#,
or 29...Ka6 30 Qc6+ etc or 29...Ka5 Qd5+ etc. 29.Qxb7+ also mates. Time to
check:
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Everyone has got there already. <viking78>: Both lines are just as good.
Rewind to just before move 26:
click for larger view
White continues 26.Rae1 and Black continued 26.Rhg8? setting up the puzzle position. Instead
26...Rd8! defends. Hee's an interactive link to Crafty Endgame Simulator:
http://www.chessvideos.tv/endgame-t....
White has the advantage, but converting it without the help of an engine is another matter. I had to settle for repetition in the line 26...Rd8 27.Qf2 Kb8 28.R1e6 Qg4 29.b3 (not 29.Rf6 Qa4+!) h5 30.Rf6 Rhf8 31.Ref7 Rfe8 32.Kd2 Qh3 33.Rxf5 Qh1 34.Qf1 Qh2+ 35.Qf2 Qh1 etc. Enjoy doing better! |
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| Feb-29-12 | | vrandolph: Think this was easier than yesterday. |
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| Feb-29-12 | | dufferps: As I viewed this sequence, I thought, "How clever of Aagaard to move 29.Rxb7+ for a sure win instead of the oh-so-inviting 29.Qxb7+." But as I looked at the possible sequences after 29.Qxb7+, I saw that it was at least as efficient in forcing a sure win - in fact more so.
29.Qxb7+ Kc5, 30.b4# or
29.Qxb7+ Ka5, 30.b4+ Ka4 31.Qa6# |
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Feb-29-12
 | | Gilmoy: From 2004: <iron maiden: we don't actually> know how to <play chess on this site; we just> mumble :) <Once: It's that golden moment <again.>>
Because Once is not enough!
<... the closest that law-abiding happily <married> men/women can get to a bit of visceral excitement.>
Is that before or after the "again" part? :)
(he: That's what makes it exciting!)
(she: and later, the visceral)
I saw 29.Qxb7+, which also seems to (laboriously) mate. Re-wire my principle: use <both> pieces, the Q can still jump in. |
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| Feb-29-12 | | jackpawn: Found immediately, but then took a little time seeing if I missed something. I couldn't believe a Wednesday puzzle was this easy. |
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