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Reynaldo Vera Gonzalez-Quevedo vs Gerardo Lebredo Zaragoitia
Managua (1982), ?
Zukertort Opening: Sicilian Invitation (A04)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
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.
Jan-07-11  castle dweller: wasn't it earlier this week we had rooks sliding along the outer edges of the board to do their duty? week of the sliding rooks apparently
Jan-07-11  VargPOD: I got the 28.Rxc8 Qxc8 29.Bxf5+ gxf5 30.Qxg7 almost immediately and said to myself "Wow, this is an easy friday!". Apparently, it wasn't so easy...
Jan-07-11  CHESSTTCAMPS: In this opposite-colored bishop middlegame, white is down a pawn, but has the attack against black's exposed king in the middle. On first look, I saw the exchange-winning combination 28.Rxc8 Qxc8 29.Bxf5+ gxf5 30.Qxg7 where the threat of 31.Rh1 is hard to meet. However, white has even better:

28.Bxf5+! gxf5 (K-moves 29.Rxf8) 29.Rh6+

No need to head into an endgame, however favorable. There is no safe haven for the king:

A) 29... Kd7 30.Qxg7+ Kd8/d8 31.Rh8#

B) 29... Rg6 30.Qxg6+ Ke7 31.Qe6+ Kf8 32.Rf6+ Kg7 33.Rg6+ Kh8 (Kf8 34.Rg8#) 34.Rh1+ Qh7 35.Qf6#

C) 29... Kf7 30.Qf6+ Ke8 38.Rh8+ Kd7 39.Qxg7+ Kc6 40.Qg6+ Kb7 (Qd6 41.Qxd6+ and 42.Rxc8) 41.Rh7 wins the queen.

C.1) 30... Kg8 31.Rdh1 Rh7 (forced) 32.Rxh7 Qxh7 33.Rxh7 Kxh7 34.Qf5+ picks off the remaining rook.

Jan-07-11  estrick: Mon, Tue, Wed: sac a rook
Thur, Fri: sac a bishop
Jan-07-11
Premium Chessgames Member
  Domdaniel: I generally try to forget/ignore whatever day of the week it is. Real game positions don't come with levels of difficulty attached, or strong hints as to the kind of thing to look for.

So I settled for the 'easy' Rxc8 and Bxf5+, winning the exchange. But winning very little in reality, as the strong Bishop on d4 is as good as a Rook.

It's one thing to sac the exchange in the knowledge that your minor piece will then be worth a rook. It can be harder to 'win' the exchange (or to see a tempting way of doing so) -- and understand that you're not winning.

I still think that over-reliance on the day-of-the-week pattern is not entirely healthy ... even though some reflection on the Friday Syndrome would have persuaded me, here, to keep looking.

What keeps somebody looking in an actual game, though? One of two things -- the tactical ability to see the mating combo in a flash, or the positional understanding that winning the exchange isn't enough. They often go together.

Jan-07-11  noendgame: Got it! I don't get many Friday puzzles, at least not easily, but I saw the bishop sac and rook follow up at a glance--maybe this wasn't Friday level difficulty...?
Jan-07-11  mastermind7994: Yes! I found 28.Bxf5! although in my plans I was rooting for 31.Rhd1 which I think it's still mating. Nevertheless, it is an unwritten rule that it's best to play the forcing moves (e.g. check in this case).
Jan-07-11
Premium Chessgames Member
  kevin86: Yes,I had Rf5,but missed on the complexity of the follow-up moves.
Jan-07-11  MiCrooks: At the GM level the game after Rxc8 up the exchange in this position is almost surely a win. However, even if it was a clearly demonstrable win it would still not be a solution to the puzzle given that the puzzle leads to forced mate. That said I went for winning the exchange as well thus missing the puzzle.

Over the board I am unsure what would have happened. I find you are more aware of the tactics inherent in a position if you have played the moves leading up to them in a game of your own. With the clock ticking having found the forced win of the exchange and a pawn I would likely take it. However, if I had been the one creating the game I would likely have been more aware of the mating potential in the postion.

Funny that Kd6, which you would write off as an easy win due to the immediate win of a Rook actually is a forced mate as well. You just have to hold off your greed for a move and find Qf6+ first. How many players would find or play that litte inter-mezzo?

Jan-07-11  SpoiltVictorianChild: Didn't see the pretty mate that comes from not playing Qxf5+.

I had:
Bxf5 gxf5
Rh5+ Kf7
Qxf5+ and various replies to the king move.

It's not as clean as the text, but can anyone see something wrong with it? What's best case scenario for black there?

Jan-07-11
Premium Chessgames Member
  Jimfromprovidence: Its a shame that the puzzle did not start at move 25. Now, after 25 dxe6+, if 25...Kd6, there's a couple of very nice combinations that win for white.


click for larger view

Jan-07-11
Premium Chessgames Member
  doubledrooks: Count me among those who went in for just the win of the exchange and a pawn.
Jan-07-11  starkidaway: <SpoiltVictorianChild> I also thought of Qf5+ and it's also correct but just a little slower.

After 30. Qf5+ black has three options.

A) 30...Ke7 31.Qe6+ mates.
B) 30....Ke6 31. Qe6+ Qe7 (or Re7) 32.Rh*+ mates.
C) 30....Kg8 31.Rdh1 and black is completely lost.

Jan-07-11  Sho: I solved today's puzzle! I'm proud of me.

(Except for move 31, I missed move 31--and I know darn well that if I were playing this on my computer, I would have gotten to move 31, been stumped, and would have hit <undo> back to move 28 to try something different.)

Life at 1300 ELO.

Jan-07-11  gofer: I don't see this as a Friday puzzle!?

<28 Rxc8 Qxc8 (forced) 29 Bf5+ gxf5 (forced) 30 Qxg7 winning>

White has won a pawn, the R for B exchange and opened up the black king's defenses. What's worse for black is that Pc4 isn't hanging! 30 ... Qxc4 31 Qg8+ winning the queen, so really things look very bleak for black in this position. I can only assume I have missed something amazing, but there don't seem to be any unusual checks/stalemates etc etc... ...time to check!

Jan-07-11  WhiteRook48: So I decided for 28 Bxf5+ gxf5 29 Rh6+ Kg7 30 Qf6+ Kg8 31 Qe6+ with a winning attack. Then I switched to 28 Bxf5+ gxf5 29 Rxc8 Rxg5 30 Rxc7 up the exchange. AARGH!
Jan-07-11
Premium Chessgames Member
  Once: Take the money or open the box? Well, wadda-ya-wannado? Take the money or open the box?

I took the money with 28. Rxc8.

And then the grinning compere says "Well done, you've taken the money and Fritz says you're taking home a positive eval of +2.38. Congratulations. But let's open the box and see what you might have won...."

Drum roll, the audience gasps as he opens the box to reveal ...

28. Bxf5+ is a much better move and Fritzie gets all priapic with +19.76.

"So how do you feel right now?" he asks, putting an arm around my shoulder.

I shrug. "Hey, it could be worse. I could be an Australian cricket supporter."

Jan-07-11  dcarlisle: I thought along the same lines as gamlino... queen and rook vs queen and bishop ending. Not as elegant as this game.
Jan-07-11  Brandon plays: Bxf5+ seems to win. I was very relieved to see this move because everything else wasn't looking quite as clear.
Jan-07-11  muralman: This one fits my always looking for the kill impetuousness. It was relatively easy. I have to say, given the draws lately, I went into this puzzle a bit glum of its outcome. As soon as I envisioned the snared black King, I was home free.
Jan-07-11  wals: 28.Bxf5, was the way to go, and White
had an advantage of +22.73, before the move was made.

Analysis by Rybka 4 x64: 14 ply :
6 min :

1. (22.73): 28.Bxf5+ Kd6 29.Rxc8[] gxf5 30.Qf6+[] Kc5 31.Rxc7+[] Rxc7 32.Qd8[] Kxc4 33.b3+ Kc5 34.Rc1+ Kb4 35.Rxc7 Ka5 36.Rc4 e4 37.Ra4+ Kb5 38.Qd7+ Kc5 39.Rc4#

Jan-07-11  Patriot: I saw this pretty easily thru 31.Qe6+, although I didn't consider 31...Rf7. But after that, 32.Rg1+ Kf8 33.Rh8#.
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