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May-30-11
 | | Once: <sevenseaman> Nice puzzle - a bit easier than the others you have been giving us. The solution is another song, and this time it's the time warp. Everyone has to take a jump to the left... 1. Qa1+ Kxa1
2. Kc2 f1=anything
3. Nb3#
And nearly every piece has made a jump to the left. Just like Christopher Biggins in the film, the only piece not in step is the f2 pawn which steps forward when it really ought to be taking a jump to the left, or was that bringing your knees in tight ... or the pelvic thrust that nearly drives you insane... http://www.youtube.com/watch?v=FPzh... |
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| May-30-11 | | morfishine: "No Problemo" 20.Qxg6 "Hasta La Vista, Baby" |
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| May-30-11 | | goodevans: <hedgeh0g: ... there appear to be numerous other moves in this position which win for White.> Yep. <20 exf7+> may not be strongest but is easily winning and has a simplicity that would be fitting for a Monday. It isn't usual on a Monday for CG.com to present us with a position where there are lots of wins and ask us to find the best. That sort of thing usually comes later in the week. |
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| May-30-11 | | sevenseaman: Lets do the time warp again; whichever door opens, be there to enter.
click for larger vieww in 2 |
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May-30-11
| | Once: Delightful puzzle! It's a GOOT, where white wins by trapping every black pawn move. a6 and a5 already lose to Nb6#
b6 and b5 already lose to Ba6#
e6 and e5 already lose ot Nd6#
So we need to do something about the other black pawn moves. And we can quickly see that gxh6 has to be met by the white queen getting to the back rank. And d6/d5 has to be met by Qe6#. And that means that the only square that the white queen can go to which allows both 2. Qe6# and Q(back rank)# is g6. So that give us a possible key move of 1. Qg6, and then we notice that hxg6 is met by Rh8#. Beautiful! |
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| May-30-11 | | Marmot PFL: Attention must be paid to such a game. |
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| May-30-11 | | CHESSTTCAMPS: White has the advantages of a minor exchange, plenty of good open lines to work with, a dangerous attacking pawn on e6, and an enemy king that is caught in the middle. On my first look, I went for 20.Qxc6+ bc 21.Rb8#, then I realized the WQ was on g3, not f3. Rewind - wrong Monday queen sac! Instead, 20.Qxg6 Rg7 (fg 21.Rf8#) 21.Rxf7! does the trick, but equally effective is the routine 20.ef+ Kd7 (Rxf7 21.Rfe1 or Qxg6 wins quickly) 21.Qg4+. |
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May-30-11
 | | agb2002: White has a bishop for a knight.
Black is about to release some pressure with 20... Qxg3. The alignment of the black king and queen invites to play 20.Rae1 Qxg3 (20... Qg5 21.exf7+ Kd7 22.Qh3+) 21.exf7+ Kd7 22.hxg3 and Black will lose material. A quicker solution stems from the fact that the black king cannot move to his second rank due to the pawn on e6 and the bishop. This suggests 20.Qxg6: A) 20... fxg6 21.Rf8#.
B) 20... Rh8 21.Qxf7+ Kd7 22.Qd7#.
C) 20... Qh8 21.exf7+ Kd7 22.Qf5+ Kd8 23.f8=Q+ Qxf8 24.Qxf8+ Kd7 25.Qf5+, etc. |
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| May-30-11 | | tbentley: It was pretty clear that 20. Qxg6 Qh8 21. exf7+ wins (21. Rxf7 also mates in five), but Rybka helped with the mating lines: A) 21...Rxf7 22. Rxf7
A1) 22...Ne7 23. Rxf7+ Kd8 (Kf8 allows three mates in one) 24. Qc6 (or Qe6) bxc6 Rxb8# A2) 22...Ne5 23. Qe6+ Kd8 24. Qe7+ (24. Be7+ Ke8 25. Bh4#) Kc8 25. Qxc7# or 23. Rf8+ Kd7 24. Qf5+ Kc6 25. Qe6# A3) 22...Nd4 23. Rxc7+ Kd8 24. Qd6+ Ke8 25. Qe7# or 23. Rxb7 where black has at least four moves that allow mate in two B) 21...Kd8 22. f8=Q+ Qxf8 23. Rxf8+ Kd7 24. Qg4#
C) 21...Kd7 22. Qg4+ Kd8 23. f8=Q+ Qxf8 24. Rxf8# |
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| May-30-11 | | outplayer: beautiful |
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May-30-11
 | | Domdaniel: <Once> A slight twist in your solution to sevenseaman's timewarp: your logic, leading to Qg6, is impeccable but for one detail: Ba6# is the riposte to ...b6, but not to ...b5. But 1.Qg6 b5 2.Qa6# does it. Just nitpicking. I'd looked at ideas like 1.Qa4, which handles the b- and d-pawns but fails to resolve the kingside. Qg6 is the key, as in the main POTD. Still humming, mind you.
"When the Queen hits g6
Like a heroin fix
That's a Monday..." |
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| May-30-11 | | newton296: I went for rbe1 figuring I at least got a rook for pawn. also liked exf7+ with Qxg6 to follow but never thought of Qxg6 right off. guess I missed the rook mate at at f8 . darn |
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| May-30-11 | | vileblunder: Isn't virtually any sensible move completely winning here, anyway? |
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| May-30-11 | | ounos: I didn't look further than exf7+, winning a rook or queen for rook. |
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May-30-11
 | | NM JRousselle: A nice game by Richard V. |
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| May-30-11 | | gtgloner: Always look for a queen sac on Monday! |
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| May-30-11 | | gofer: Well there seem to be lots of ways for white to win this one... 20 Qxe5 Nxe5 21 Rbe1 winning Ne5 or Rb8
20 exf7+ Rxf7 21 Qxg6 winning Rf7
But this is Monday, so we have to find a queen sac... <20 Qxg6! ...>
20 ... fxg6 21 Rf8#
20 ... Rg7 21 Rxf7+! mating
<20 ... Qg7>
<21 exf7+ ...>
21 ... Qxf7 22 Rbe1+ winning the queen!
21 ... Kd8 22 f8=Q+ Qxf8 23 Rxf8+ Kd7 22 Qf5#
<21 ... Kd7>
<22 Qf5+ Kd8>
<23 f8=Q+ Qxf8>
<24 Qxf8+ Kd7>
<25 Qf5+ Kd8/Ke8>
<26 Qxh7 ...>
Time to check... |
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| May-30-11 | | sevenseaman: The puzzle (lets call it 'timewarp' now)is a composition by the legendary British Problemist T R Dawson, (1889 - 1951). I was highly amused by its beauty, simplicity and clockwork like operation. The Black responses(10 in all) are met by various pieces. The crux lies in finding 1. Qg6, the rest is trivial detail. The Q, when placed at g6 handles 3 of these responses(b5, d6 and gxh6). |
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May-30-11
| | Once: <Domdaniel> Well spotted! Qa6# is such a delightful move. |
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| May-30-11 | | David2009: Teichmann vs Loman, 1904 White 24? Sooner or later I am going to fail a Monday puzzle and this could be the day. Level material,
White has an apparently overwhelming position but what is the corect finish? Plan A:
20 Rbe1 and if Qxg3 22 exf7+ Kd7 23 hxg3 and the f Pawn will cost Black a Rook. Plan B:
20 Rxf7 threatening Rf8# and if 20...Rxf7 21 Qxg6 threatening Qg8+ and Qxf7+. Plan C:
20 Qxg6 and if 20...fxg6? 21 Rf8#, or 20...Qg7 21 Rxf7 renews the threat. All three lines appear to win, I will go for line (C).
Time to check:
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The puzzle position (White to play, 20) is
click for larger view
Crafty End Game Trainer link is:
http://www.chessvideos.tv/endgame-t...
confirming that the game line, Plan C, is the fastest win. |
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| May-30-11 | | stst: Easy yet interesting.
Two lines are competing for optimality.
(A)20.Pxf7+, and (B)20.Qxg6
It appears (A) is more direct:
(A)
20.Pxf7+ Rxf7
21.Qxg6 for a pin of R
At this point Bk has several options:
Kd7, Ne7, Qg7; all lead to similar ending, e.g.
21......Ne7
22.Qxf7+ Kd7
23.Rbe1 Qg5 (guards e7, somewhat better than trading low by Qxe1, 24.Rxe1..)
24.Qe6+ (confining K's surfacing towards 6, 5th ranks) Ke8 (if Kd8, 25.Rf8#)
25.Rf5 (drives the Q) Qg7
26.Rf1 and next R5f7 where Qxe7 will be mate. |
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May-30-11
| | Domdaniel: This is actually a classic case where a chess truism applies: <The Threat is stronger than the Execution>. A line everyone knows, but rarely puts into effect. Here, it seems almost perverse *not* to play exf7+, either before or after Re1. The Bishop covering f8 seems to make it even more effective. Yet there's something else. In its current position on e6, the pawn combines with the Ba3 to cut off the Black King from all escape squares on the 7th rank. This is the threat that is stronger than the execution exf7+. We just need to set up a 'virtual back rank mate' (Rf8#) or infiltrate the Queen for Qxf7+ Kd8, Qd7#. And yes, 21.Qxg6! forces one or the other. It's important, as a few people have noted, to see defences such as 21...Rg7 or ...Qg7, and find solutions to them. I like the way that 21.Qxg6 Rg7 22.Rxf7 offers the Queen for a second time, by renewing the threat to the virtual back rank. |
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| May-30-11 | | BOSTER: This is the position after 18. e6!
click for larger view
White wants to destroy pawn structure f7,g6 and began create mating net with e6 as a key and Ba3 and Rf1.
But to hold such pawn on e6 is very dangerous,and maybe best idea was to play fxe6. And even this move open "f" file for rook, and white can take Qxg6 with check, black pieces after this are more coordinated.(rooks are united, knight can move on e7, and file "d" is closed, and black king can move on d7). |
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May-30-11
| | Domdaniel: Meanwhile, before anyone rushes to add 'virtual back rank' to the chess lexicon, let me suggest a pun/literary allusion thingy for the POTD. 'Death of a Salesman' springs to mind, after Willy Loman in the play of that name. And isn't there something salesman-like in the FREE special offer on g6? And perhaps Black got more than he bargained for. |
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May-31-11
 | | kevin86: Unusually tough for a Monday. If I had not looked for the queen sac,I never would have found it. Sets up the irony:because it is a Monday puzzle MAKES it a Monday puzzle. |
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