< Earlier Kibitzing · PAGE 1 OF 2 ·
|Jan-07-11|| ||thathwamasi: First.... I thought this is pretty simple for a Friday - The bishop sac was pretty straight forward.|
|Jan-07-11|| ||Phony Benoni: |
click for larger view
Good lesson in not settling for the obvious! Looking around, I focused on the potentially unprotected rook on g7, and chose 28.Rxc8 Qxc8 29.Bxf5+ gxf5 (else 30.Bxc8) 30.Qxg7, and Black can't even go in for 30...Qxc4 31.Qg8+.
But that's too simple. There has to be a refutation. And so there is--in the sense that White can do better.
After <28.Bxf5+>, Black has to take or lose a whole rook on c8. Now <28..gxf5 29.Rh6+>, and the king has to retreat back toward g8, otherwise, it will get forced to the first rank when there will be no useful interposition after Rh8+.
<29...Kf7 30.Qxf5+ Kg8 31.Qe6+> clinches matters. 31...Qf7 32.Qxc8+ Qf8 33.Rh8+ is an old friend, 31...Rf7 32.Rg1+ lets the other rook have some fun, and 31...Kf8 32.Rh8+ has only the merit of brevity.
Should have sat on my hands, and looked more carefully at all the checks.
|Jan-07-11|| ||mrsaturdaypants: When Mikhail Tal saw a series of winning moves in an instant, he could generally be certain that this flash of insight would, indeed, lead him to victory. And that's the difference between Tal and me. |
With that said, this one looks easy. Let's see.
28 Bxf5 gxf5 29 Rh6+ Kf7 (Kd7 allows mate in two) 30 Qxf5+, and now:
(a) 30...Kg8 31 Rdh1, and white wins;
(b) 30...Ke7 31 Qf6+, with mate to follow; or
(c) 30...Ke8 31 Qe6+, and black is in a bad way.
My moment as Mikhail? Unlikely. But, time to check.
|Jan-07-11|| ||Formula7: I saw the exchange-winning 28.Rxc8 Qxc8 29.Bxf5+ gxf5 30.Qxg7, but I didn't see the actual solution.|
|Jan-07-11|| ||stacase: Difficult? I thought it was easy, just what I would have done over the board - move for move.|
|Jan-07-11|| ||rilkefan: <Good lesson in not settling for the obvious!>|
Oops. I was thinking this was too easy to be a Friday puzzle. Annoyingly I looked at Bxf5 as a candidate move but didn't see Rh6 immediately and was already off winning pawns and exchanges not kings.
|Jan-07-11|| ||dzechiel: White to move (28?). Black is up a pawn. "Difficult."|
From the moment I have seen this position, I have wanted to play
but I wasn't exactly sure on how to follow up. Black takes the sacrifice with
but then I wanted to play 29 Re8+, however I could not get that to work. I was about to abandon the bishop sacrifice altogether when I saw a new check...
OK, now we are making progress. Black's hand is forced here...
anything else drops the rook on g7 with check.
30 Qf6+ Kg8
On 30...Ke8 white plays 31 Rh8+ Kd7 32 Qxg7+ picking up the rook and going at least an exchange up. Probably more.
and now the threat of 32 Rh8# is too much for black to deal with.
This looks like it, time to check.
Hmmm, white's 31 Qe6+ looks even better. Wish I'd seen it.
|Jan-07-11|| ||al wazir: What was wrong with 25...fxe6 ?
26. Rxd4+ exd4 27. Qxd4+ Kb6 28. Bg2#. That's what.
I went with 28. Rxc8 Qxc8 29. Bxf5+ gxe5 30. Qxg7, with a small advantage.
|Jan-07-11|| ||Primoman: I got it but saw a different attack scenario that also seems to work.|
28 Bxf5 gxf5 29 Rxc8 Qxc8 30 Qxg7 and white is ahead with a rook vs a bishop.
But how Vera played is better.
|Jan-07-11|| ||M.Hassan: "Difficult" White to play 28.?
White is a pawn down
At first I went through the line 28.Rxc8 Qxc8 29.Bxf5+ gxf5 30.Qxg7 Qxc4 31.Qg6+ Ke7 32.Qxf5 White becomes slightly better but looses c pawn which later investigations revealed that it is a valuable asset for White and should not let it go easily. I then followed this line:
29.Rh6+ Kf7(King can not go to d5 because of c pawn)
If the King had escaped through a different route on move 30, things would not have been grossly different.Back to move 30:
35.Rh1+ followed by loss of Black Rook.
Time to check
very close. Another survival on a Thursday
|Jan-07-11|| ||franksp: Nice variations from move 26.
If 26...f6, 27.Qh6 wins at least a rook
If 26...Kd6, 27.Rxc8 Qxc8 28.Qf6 and, after Black moves the rook or protects it with the queen, 29.e7 or ef wins queen or rook or the pawn queens at f8.
|Jan-07-11|| ||TheaN: Friday 7 January 2011
Material: Black up
Candidates: Rxc8, <[Bxf5†]>
I went on a few different paths in some variations and certainly not the best, alas the sac itself is a straightforward demolition. As said, opposite Bishops favor the attacker and White concurs.
<28.Bxf5† gxf5> lets leave 28....Ke7 29.Rxc8 out of the analysis.
<29.Rh6† Kf7> even though 29....Kd7 allows 30.Qxg7† I somehow settled for the similar winning combo 30.Qxf5† Ke8 (Ke7 31.Qe6† with Rh8† and mate) 31.Rh8† Ke7 32.Rxc8. Truth is that this is very good but just taking the Rook is mate in two >_>.
<30.Qxf5† Kg8> Ke8 with the above.
<31.Rdh1> this seems better than the game line? Of course after 31.Qe6† Qf7 (Kf8 32.Rh8† Rg8 33.Rxg8‡ and Rf7 32.Rg1† Kf8 33.Rh8‡) 32.Qxc8 Qf8 33.Rh8† White is mating as well but doesn't this just mate in two moves either? In any case Black is dropping a lot in either variation and is lost after Kg8. Time to check.
|Jan-07-11|| ||Richard Taylor: I don't try to work these insane ones out any more - I just play over the games. I put them all in the too hard department.|
I'm insane enough as it is...
|Jan-07-11|| ||agb2002: White is a pawn down.
Black threatens 28... Rxh8 and ... Qxc4.
After 28.Rxc8 Qxc8 the rook on g7 is defenseless and the white bishop x-rays Black's king and queen. This suggests 28.Rxc8 Qxc8 29.Bxf5+ gxf5 30.Qxg7 followed by Rg1 or Rh1 with a winning attack and an exchange ahead. For example:
A) 30... Qxc4 31.Qg8+ Kf6 32.Qxc4 + - [Q+R vs B+P].
B) 30... Qa1 31.Qg6+ Ke7 32.Qxf5 + - [R+P vs B].
Another option is 28.Bxf5+ gxf5 (else 29.Bxc8 + - [R]) 29.Rh6+ Kf7 30.Qf6+:
A) 30... Kg8 31.Rdh1 Rh7 32.Rxh7 Qxh7 33.Rxh7 Kxh7 34.Qxf5+ and 35.Qxc8 + - [Q+P vs B].
B) 30... Ke8 31.Rh8+ Kd7 32.Qxg7+
B.1) 32... Kc6 33.Qxc7+
B.1.a) 33... Kxc7 34.Rxc8+ Kxc8 35.f4 Kc7 36.fxe5 Bxe5 37.Rd5 and 38.Rxf5 + - [R+P vs B].
B.1.b) 33... Rxc7 34.f4 Rf7 35.fxe5 Bxe5 36.Rh6+ Kb7 37.Rd5 Bc7 38.Rh5 f4 39.Rhf5 and White should win the endgame.
B.2) 32... Kd6 33.Rxd4+ exd4 34.Qxd4+ Ke6 (34... Kc6 35.Qd5#) 35.Rh6+ and 36.Rh7+, 37.Rxc7, etc.
The first option, 28.Rxc8, is probably better.
|Jan-07-11|| ||agb2002: After 28.Bxf5+ gxf5 29.Rh6+ Kf7 30.Qf6+ Ke8 I missed the simple 31.Qe6+, as in the game, which wins immediately.|
|Jan-07-11|| ||Lennonfan: Im new to this site,but I got this after 10 seconds or so...28.Rxc8 QxR 29.Bxf5+ gxf5 30.Qxg7 then the black queen cannot capture whites c pawn or black loses his queen...thats about the depth of my analysis!! But as i dont use a computer to analyse i can still see it looks fairly good for white from then on....i think?|
|Jan-07-11|| ||woody b: darn, i saw bxf5 first, with the whole line up to Kg8. then i didn't see the consequences of qe6+ and started to look for something else.
found the same as phony benoni
(rxc8 qxc8 bxf5 winning the exchange)
|Jan-07-11|| ||gmalino: I don't have much time today, but a first glance on the board makes me feel like|
28. Rxc8 Qxc8
29. Bxf5+ gxf5
with the winning of quality is the solution.
Everything is very forced, a variation not really possible.
I would play that at the board immediately.
If it's right, i'm 5/5 this week.
Seems to be too easy for a friday.
|Jan-07-11|| ||gmalino: Ok, not the solution, but the exchange winning line wins also. This line is def. too easy for fridays, so i should have thought deeper. but don't have the time for....|
|Jan-07-11|| ||Lennonfan: <gmalino> i did exactly the same as you..however,after looking deeper and longer i still didn't see the checkmate!!
And im guessing from your post that fridays puzzle's are usually harder?? Maybe im having a bad day lol|
|Jan-07-11|| ||patzer2: For today's Friday puzzle solution, I unashamedly went for the easy and obvious 28. Rxc8 Qxc8 29. Bxf5+ 30. Qxg7 , using a decoy with a skewer threat to win the exchange and a pawn.|
However, much stronger was the pursuit mating attack combination in the game continuation with 28. Bxf5+!! .
Here's a breakout, played out with Fritz 10:
<28. Bxf5+!!> This is by far the strongest move, leading to a forced mate in the game continuation.
White passes up the simple win of the exchange with 28. Rxc8 Qxc8 29. Bxf5+ gxf5 30. Qxg7 Qd8 (not 30... Qxc4?? Qg8+ with a skewer to nab the Queen) 31. a3 a5 32. Qg2 . With the exchange and a pawn for his effort, White should win the ending.
This is practically forced, as 28... Kd6 29. Bxc8 wins material with an overwhelming attack.
<29. Rh6+!> This key followup is the only move to keep the winning advantage.
If 29... Kd7, then it's mate-in-two after 30. Qxg7+ Kd8 31. Rh8#.
<30. Qf6+!> According to Fritz, 30. Qxf5+ leads to mate-in-eight, but this way is quicker.
If 30... Ke8, then it's mate-in-three after 31. Qe6+ Qe7 32. Rh8+ Rg8 33.
<31. Qe6+!> This pretty move forces immediate resignation. I prefer it if for no other reason than pure aesthetics.
However, Fritz indicates White can mate easier and a bit faster with 31. Rdh1! Rh7 32. Rxh7 Qxh7 33. Rg1+ Qg6 34. Rxg6+ Kh7 35. Qg7#.
Black resigned here, after 31. Qe6!, in lieu of 31... Rf7 (31... Kf8 32. Rh8+ Rg8 33. Rxg8#; 31... Qf7 32. Qxc8+ Qf8 33. Rh8+ Kxh8 34. Qxf8+ Kh7 35. Rh1+ Kg6 36. Rg1+ Kh7 37. Qxg7#) 32. Rg1+ Kf8 33.
P.S.: If you're pressed for time over the board, IMO there's nothing wrong with going for the obvious and easy win you can clearly visualize. However, training yourself to see this kind of combination more quickly can I suppose raise one's skill level to the point that it becomes easy. However, the fact that it was a three star Friday puzzle might suggest that for most of us that's not the case.
|Jan-07-11|| ||David2009: R Vera vs G Lebredo, 1982 White 28?|
28 Rxc8 Rxc8 29 Bxf5+ gxf5 (otherwise the Q is lost) 30 Qxg7 and White has won the exchange. 30...Qxc4? loses the Q to the skewer 31 Qg8+
This seems way too easy for a Friday problem. Time to
check and see what I missed:
I have missed a checkmating line. Time to check that the posted line also wins. The puzzle position is:
click for larger view
(R Vera vs G Lebredo, 1982 White 28?) Crafty End Game Trainer link:
http://www.chessvideos.tv/endgame-t.... You are white, drag and drop the move you want to make.
A win starting Rxc8 is very difficult to find (Crafty EGT defends with 30...Qd8! and I have not so far found a win).
Conclusion: I have failed to solve this puzzle.
|Jan-07-11|| ||malkabir: Yup!! saw it at first glance. What struck me about this position is how the rook on d1 is sitting there all by its lonesome, probably feeling a bit left out and Mr.Vera is like, "don't worry son, i'll let you have the final say" ;)|
|Jan-07-11|| ||Stormbringer: Got it in one. For reference I often miss Tuesdays and occasional Mondays, so this probably was a bit easier than normal for a Friday.|
|Jan-07-11|| ||hedgeh0g: I settled for Rxc8, followed by Bxf5+, not being able to see any refutation for Black. However, settling for a superior endgame which could prove tricky to win pales in comparison to an outright winning continuation with 28.Bxf5+! immediately.|
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