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|May-18-12|| ||M.Hassan: "Difficult" White to play 24.?
Sides are equal.
Black wins two pawns and is in a better position.
Other possibility is that if the King declines taking the Queen on move 25:
|May-18-12|| ||sevenseaman: At first sight, an evil, rollicking wild idea has infiltrated my mind. I wonder if my head is screwed on right;|
24. Rxf7+ Rxf7 25. Qxh6+ Kxh6 26. Nxf7+ with a royal fork.
If Black declines the Q with 25. Kg8 then 26. Qh8+ and the royal fork still comes in.
2 Ps net gain and a dynamic winning position. I have indeed become a gambler!
For the record I also tried 24. Nxf7 Rxf7 25. Qc3+ Rf6 et al but the argument did not conclusively resolve in my favor. And it was a secondary impulse to boot.
|May-18-12|| ||scormus: Neat finish, I suppose quite easy when you know its a puzzle ... Only question to consider is what if B doesnt go 25 ... Kxh6. |
If ... Kf6 26 Qxg6+
If ... Kg8 26 Qh8+ its essentially the same as in the game. 26 Nxg6 is tempting but I think B can defend.
It looks so clear, but 24 Nxf7 <Jim and others> is even neater, though maybe not as easy to work out OTB
|May-18-12|| ||FSR: White wins two pawns and reaches a won ending with 24.Rxf7+! Rxf7 25.Qxh6+! Kxh6 26.Nxf7+. Black can also try 25...Kg8, but simply 26.Nxf7 Kxf7 27.Qh7+ Kf6 (27...Kf8 28.Qh8+ Kf7 29.Re8) 28.Re8 will win easily enough.|
|May-18-12|| ||agb2002: White has a knight for a bishop.
The knight, close to the black king and queen, suggests 24.Rxf7+:
A) 24... Rxf7 25.Qxh6+
A.1) 25... Kxh6 26.Nxf7+ Kg7 27.Nxd6 + - [N+2P vs B].
A.2) 25... Kg8 26.Qh8+ is similar to A.1.
A.3) 25... Kf6 26.Qxg6+ Ke7 27.Qxf7+ Kd8 28.Nc6+ Qxc6 ( 28... bxc6 29.Re8#) 29.dxc6 and mate soon.
B) 24... Kg8 25.Qxh6 Rxf7 26.Qh8+ transposes to A.2.
C) 24... Kh8 25.Qxh6+ Kg8 26.Qh7#.
|May-18-12|| ||FSR: <<LeDruide: 24.Nxf7 Rxf7 25.Qc3+ Kg8 26.Re8+ Rf8 27.Rxf8+ Qxf8 28.Rxf8+ Kxf8 29.Qh8+ if 25....Rf6 26.Rxf6 Qxf6 27.Re7+> |
rishicomplex: I saw Nxf7 and assumed I had solved it....
24. ... Rxf7 is forced to prevent mating threats at h6 after which there is no good response to Qc3+
Houdini gives Rxf7 +5 eval and Nxf7 +13>
No doubt about it: 24.Rxf7+ is crushing, and 24.Nxf7! even more so.
|May-18-12|| ||Abdel Irada: Call it the Henny Youngman attack: "Take my queen — please."|
In any case, "difficult" this is not. After 24. xf7+, black may accept or decline the sac:
(1) 24. ...xf7; 25. xh6+ and black has his choice of three ways to lose:
(1.1) 25. ...g8; 26. h8+, xh8; 27. xf7+, g7; 28. xd6± and white enters the endgame two pawns to the good.
(1.2) 25. ...xh6; 26. xf7+, g7; 27. xd6± transposing to line 1.1 a move earlier.
(1.3) 25. ...f6; 26. xg6+, e7; 27. xf7+, d8; 28. c6+ and either (1.3.1) 28. ...bxc6; 29. e8# or (1.3.2) 28. ...xc6; 29. e7#.
Or black can decline the rook:
(2) 24. ...g8; 25. xh6, xf7 (necessary thanks to the twin mate threats at g7 and h7); 26. h8+, xh8; 27. xf7+, g7; 28. xd6±, transposing to line 1.1 with a won ending for white.
|May-18-12|| ||TheBish: Barbero vs U Rueetschi, 1987|
White to play (24.?) "Difficult"
I got this very quickly (not to brag), maybe about 10 seconds, which means either that it wasn't that difficult, or that I've seen this before (quite possible), or both!
24. Rxf7+!! Rxf7
After 24...Kg8 White wins easily with 25. Rxf8+ followed by either 26. Qxh6+ or 26. Nxg6, depending on which way Black recaptures.
White had to see this move before making the 24th, which is why I gave the 24th move two exclams.
Instead, 25...Kg8 26. Qh8+! is similar.
26. Nxf7+ Kg7 27. Nxd6
White wins two pawns in all lines, with a passed d-pawn and an easy win.
|May-18-12|| ||sevenseaman: <FSR> You are indeed very seriously into the POTD thingy. After your view that both 24. Rxf7 and 24. Nxf7 are winning, I tried it against Crafty. Black loses even with the better defense 25...Kg8.. |
At submission of my sol, I had cursorily thought 24. Nxf7 Rxf7 25. Qc3+ Rf6 could hold for Black and I plumped for the Rxf7+ variation that struck me first.
White can and does make it impossible for the a8 R to come out.
Here is the link for you to roam about; 24. White to play.
|May-18-12|| ||polarx: Like rishicomplex, thought Nxf7 was the answer. It seems good enough:|
1. Nxf7 Rxf7 2. Qc3+ Kg8 3. Re8+ Rf8 4. Rfxf8+ Qxf8 5. Rxf8+ Kxf8 6. Qf6+ Kg8 7. Qxg6+ Kf8 8. Qxh6+ Kf7
Edit: I guess Barbero saw Nxf7 but preferred to finish à la Petrosian.
|May-18-12|| ||morfishine: <24.Rxf7+> pushes Black off the cliff, lock, stock and barrel: After <24...Rxf7 25.Qxh6+ Kg8 (25...Kxh6 26.Nxf7+)> Black hangs by a thread, which White cuts through with <26.Qh8+! Kxh8 27.Nxf7+> followed by <28.Nxd6>|
Reminds me of what Petrosian did to Spassky, not once, but twice
|May-18-12|| ||Swedish Logician: Rxf7, Qxh6, and Nxf7 + springs to mind immediately if one has once seen combinations of that kind ..|
|May-18-12|| ||Ratt Boy: h8+.
Shades of Petrosian.
|May-18-12|| ||James D Flynn: 24.Rxf7+ Rxf7 25.Qxh6+ Kxh6 26.Nxf7+ Kg7 27.Nxd6 and White threatens Re8 or if Bd7 28.Re7+ or if Bf5 28.Nxf5+ gxf5 29.Re7+ and more pawns fall. If instead 25…..Kg8 26.Qh8+ and Black is forced to take with similar results. 25……Kf6 is no better 26.Qf4+ Bf5 27.Ng4+ and 28.Qxd6.|
|May-18-12|| ||gambler: Some other idea... I looked at Qc3!
The idea is a discovered check on the king using the knigh to attack the queen. If the queen moves, you can still do this discovered check to capture the rook. So there are only 2 moves:
a) ... kh7
b) ... kg8
a) ...kh7 2.Rxf7+ Rxf7 3. Nxf7 (threatening mate in one with Qh8# and attacking the Queen on d6, so:) ...Qf8 4. Re7 ... (with the idea of 5. Ng5+ kg8 6. Rh7 ... 7. Qh8#) and there is no way to prevent this combination
b) ...kh8 2. Nxf7
if white choose to move his queen, Nxh6 will capture the rook for a knight (... Qe7/Qg3/Qb6/Qa6 3. Nxh6 kh7 4. Rxf8 kxh6 so)
...Rxf7 3. Rxf7 kxf7 4. Qh8! (pinning the bishop, locking the rook and attacking the king threatening mate via 5. Rf1+ ke7 6. Qg7+ ke8 7. Qg8+ ke7 8. Rf7#, so) ... Qd7 5. Rf+ ke7 6. Qg7+ kd6 7. Rf6+ ke5 8. Rf7+ winning the queen.
Later I will put it into the computer to see if I am missing something, but as far as I see it, it looks promising.
|May-18-12|| ||gambler: ok, i @#$%ed up and overlooked the strong 1. ... f6 in response to Qc3. A way to fix this and still getting into the b) line is|
1. Nxf7 Rxf7 2. Qc3+ kg8
but then this line actually prooved to be better:
3. Re8+ Rf8 4. Rfxf8+ Qxf8 5. Rxf8 kxf8 6. Qf6+ ... 7. Qg6+ ... 8. Qh6 (+)
looks way better to me and played out easier against the PC.
|May-18-12|| ||paulalbert: Looked immediately at Rxf7ch and Qxh6ch and fork a la Petrosian vs. Spassky as mentioned. Didn't even consider Nxf7 as mentioned by others. This fork theme also occurs in an Amber 2009 blindfold game Anand vs. Leko.
Anand vs Leko, 2009|
|May-18-12|| ||Marmot PFL: Not sure it should be rated difficult- 24 Rxf7+ Rxf7 25 Qxh6+ followed by a knight fork on f7 is standard tactics, as others have also seem to have noticed.|
|May-18-12|| ||Jazzer32: It looks to me that 26.Nxg6 is even more stronger than 26.Qh8+ (not so beautiful , tho..)|
|May-18-12|| ||TomOhio: 26. Ng6 , threatening Qh8# and, if need be, Re8.
Can someone explain why this isn't a winner? I've worked out several lines, and it ends in either mate or Black loses his Queen. For example,
26. ... Rg7 to provide an escape.
27. Qh8+ Kf7
28. Ne5+ Kf6
29. Rf1+ Bf5
30. Qh6+ Ke7
31. Qxg7+ Kd8
32. Rxf5 and it's goodnight.
|May-18-12|| ||zakkzheng: This is a very easy problem for a difficult Friday|
|May-18-12|| ||TimothyLucasJaeger: <24 Qxh6+ Kxh6 Rxf7> would work out nicely if only black would agree to trade rooks. This suggests reversing the move order.|
<24 Rxf7+> Now
1. <24 ... Rxf7 25 Qxh6+>
1a. 25 ... Kxh6 26 Nxf7+ followed by 27 Nxd6 lieaves white up two pawns including a protected passer on the fifth rank.
1b. 25 ... Kf6 26 Qxg6 #.
1c. 25 ... Kg8 26 Nxg7 leaves black with no adequate way to defend h8 and e8. e.g.,
1c1. 26 .. Rh7 27 Re8+ Kf7 28 Re7+ Qxe7 29 Qxh7+, winning the queen.
1c2. 26 ... Rg7 and since i can't seeem to get 27 Qh8+ Kf7 28 Qe8+ Kf6 29 Rf1+ Bf5 to work i guess i'd settle for 27 Re7+ Qxe7 28 Nxe7
actually wait skip all that (1c)
1cRevised. after 25... Kg8 just 26 Qh8+ Kxh8 27 Nxf7+ and 28 Nxd6
2. <24 ... Kg8 Qxh6 Rxf7> transposes to 1cRevised.
Looks like that's it.
|May-18-12|| ||TimothyLucasJaeger: whoops in my 1b. 26 Qxg6 isn't mate. Others have pointed out the winning line.|
|May-18-12|| ||awfulhangover: Must be an easy Friday. I saw it all, although I'm dumb.|
|May-18-12|| ||mistreaver: Friday, material even, Difficult!
White is clearly better, black is underdeveloped and white has 2 open files.
This is one of those positions where combination is simply "in the air".
So let's see:
Sacrifice od knight looks nice:
24. Nxf7 Rxf7 (else Qc3+ and mate)
25. Qc3+ Kg8 (else black loses his rook)
26. Re8+ and now Black must play Qf8 giving up his queen.
I like this line, altought black has rook and bishop vs queen, white is totally wining,
if i haven't missed something.
Hmm rf7+ is good, but what have i missed in my line? Any thoughts?
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