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Leinier Dominguez Perez vs Alexander Morozevich
Corus (2009)  ·  Sicilian Defense: Najdorf Variation. English Attack (B90)  ·  1-0
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Kibitzer's Corner
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Feb-02-10  cyclon: I wouldn´t call this exactly 'easy'. 35.Rb8+ Kg7 (similar idea applies to -Ke7) 36.Nf5+ Qxf5 (otherwise mates) 37.exf5 (this move is the point) -Bxd2 (other moves loses variedly) 38.f6+ Kxf6 39.Rxh8 and White has theoretically a winning position, but there's still more or less play left to prove it. Was I right? Let's see.
Feb-02-10  cyclon: Ok. Nice (35.Nf5). Maybe 35. -Qxf5 (instead of -Rc8) would have prolonged a little.
Premium Chessgames Member
  YouRang: It wasn't hard to find 35.Nf5!, creating back-rank mating threats by sealing off the 7th rank escape squares. e.g. 35...Bxd2? 36.Rb8+ ~#.

Nevertheless, it's very pretty chess. :-)

It appears that the only way to defend the back rank is 35...Rc8 (as played), but then 36.Rb8!! anyway, setting up 36...Rxb8 37.Qd6+ with mate unavoidable.

So, black's only game-saving reply may be 35...Qxd1+ 36.Qxd1, but in that case it's only wasting time to not resign.

Feb-02-10  SneakWeasel: Instead of 35 Rb8 why not Qxg5. Then if gxf5 Rd8+leads to mate.
Premium Chessgames Member
  YouRang: <SneakWeasel: Instead of 35 Rb8 why not Qxg5. Then if gxf5 Rd8+leads to mate. >

I think 35.Qxg5 Qxd1+ 36.Kb2 Qd8 ..

Feb-02-10  mrsaturdaypants: Hmm. I tried to make 35 Rb8+ work, but it looked like 35...Ke7 made things difficult. So instead:

35 Nf5 Qxf5

[gxf5 36 Rb8+ Ke7 ♔g7 37 ♕xg5# 37 Qd6#]

[Bxd2 36 Rb8+ Rc8 37 Rxc8#]

36 exf5 Bxd2 37 f6 Rc8 [Ke8 38 Rxd2] 38 Rxd2 h5 39 Rxd5

Now white has back rank threats, threats against f7, and has a chance to just push a queenside pawn down the board so long as black has a rook still in jail.

I like this last line, but it's pretty complicated for a Tuesday. Maybe I missed something more direct.

Time to check.

Feb-02-10  mrsaturdaypants: Silly me. I missed 36 Qd6+...not to mention 35 Rc8. Fun puzzle.
Feb-02-10  cyclon: cyclon: <SneakWeasel:Then if gxf5 > and <YouRang:I think 35.Qxg5 Qxd1+ 36.Kb2 Qd8 .> If you meant 36.(not move number 35. after 35.Nf5 Rc8) Qxg5? (instead of 36.Rb8!), then -Qxd1+ 37.Kb2 Qxc2+, Black has perpetual ( -Qd8? 38.Qh6+ Ke8 39.Rxe5+ Kd7 40.Rd5+ should win for White) after 38.Ka1 by -Qd1+, because 38.Ka3? Ra8+ 39.Kb4 Qxe4+ followed by 40. -Qxf5, Black even wins.
Feb-02-10  cyclon: cyclon: <mrsaturdaypants: Hmm. I tried to make 35 Rb8+ work, but it looked like 35...Ke7 made things difficult> If (35.Rb8+) Ke7, mate follows by 36.Nf5+. Alternatives; -Qxf5 37.Qd6X/ -Ke6/f6 37.Qd6X/ -gxf5 37.Qxg5+ f6 ( -Ke6 38.Rb6+ mates) 38.Qg7+ Ke6 39.Rb6+ mates next move.
Premium Chessgames Member
  YouRang: <cyclon> You're right -- I missed both ...Qxc2 and Qh6+ in my earlier hasty line. As you say, black can at least get a perpetual draw if 35.Qxg5.

Actually, black wins: 35.Qxg5? Qxd1+ 36.Kb2 Qxc2+ 37.Ka1 Qd1+ 38.Kb2 Qe2+ (attacking Rb5) 39.Ka1 h6! (taking away Qh6+ threat) 40.Qe7+ Kg8

Premium Chessgames Member
  David2009: Tuesday's puzzle L Dominguez vs Morozevich, 2009 White 35?

Black is threatening BxQe2, and 35 QxB?? allows 35...Qxd1+ and wins for Black. 35 Nf5! threatens a back rank mate and prevents BxQ. Meanwhile Qd6+ and Rb8+ are both threatened. If 35...gxf5 36 Rb8+ Ke7 37 Qxg5+ captures the bishop with CHECK and wins after either 37...Qf6 38 Qxf6+ Kxf6 39 Rxh8; or 37...Ke6 38 Rb6#
If 35...Rc8 36 Rc5 threatens the Bishop and Rook. Time to check: =====
Not very good: I missed the best defence 35...Qxf5! keeping losses down to an exchange. Black has practical chances after 36 Qd6+ Be7 37 Qxc7 Qf3!

click for larger view

Time to read the other kibitzes.

Premium Chessgames Member
  DarthStapler: I got the first move
Premium Chessgames Member
  whiteshark: Me, too. <1.e4>!
Feb-02-10  desiobu: ! indeed.
Feb-02-10  Dr. J: <35 Nf5 Qxf5 36 exf5 Bxd2 37 Rb8+ Kg7 38 f6+ Kxg6 39 Rxh8 Bf4> This variation and several close variants have been proposed as possibly best play. In my view Black can improve with 39 ... Bc3 maintaining control of e1. Possibly even better is 37 ... Ke7 (38 Rxh8 gxf5 or 38 f6+ Ke6! 39 Rxh8 h5). Either way Black retains atleast some chances in the ensuing queening race.

Therefore I suggest that <White's best> is to not win any material at all by 37 f6! Rc8 (forced, right?) 38 Rxd2 followed by doubling Rooks on the 7th rank. Black is completely tied up so White will win the e-pawn and queen a pawn without any possible counterplay.

Feb-02-10  WhiteRook48: that was hard
Feb-02-10  Cannon Fodder: Hardest Tuesday I've seen in a while. I went straight for 35 Rb8+.
Feb-02-10  turbo231: This is one tuff easy puzzle. Well some guys were complaining last week that the puzzles were too easy. They should be very happy with this puzzle.
Feb-03-10  TheaN: Tuesday 2 February 2010


Target: 1:25;000
Taken: slightly less than one minute, did so yesterday, no time to post.

Material: White up, ♘+♙ / ♗... for now.

Candidates: Rb8†, <[both?]>

A very critical position in this game. Black is down in material but is threatening the defender of the Rook on d1. White can move his Queen but this might lead to a strong counterattack by Black. A counterattack, if available, is in order. By the time I spotted <35.Nf5!> and the fact that it threatens mate nullifying the attack on the Queen, I thought it was the winning move. However, then I spotted <35.Rb8† Kg7 (35....Ke7 36.Nf5†! with 37.Qd6‡ 1-0) 36.Nf5†<>> with quite a similar position but more forced. In fact, the last line runs into the forced drawish <36....Qxf5 37.exf5 Bxd2 38.Rxh8 Kxh8 39.Kxd2 gxf5 <>> and all White advantage is gone, aside having two connected passed pawns. So, that suggests:

<35.Nf5!> but how is this so different from Rb8†? In the end this isn't with check, whilst then it is. However, no check is not a problem:

<35....Bxd2 36.Rb8† Rc8 37.Rxc8‡ 1-0> as spoken of earlier. So, Black has to counter and can do so by capturing the Knight. Yeah, or move the f-pawn, which leads to a nice mate:

<35....f6 36.Rb8† Kf7 37.Qe7†! Rxe7 38.Rxe7† Ke6 39.Re7‡ 1-0> barely, but mate is mate. Okay, the Knight:

<35....gxf5 36.Qxg5‡ 1-0> bad idea.

<35....Qxf5> so this might still be as forced as it was in the Rb8† line. The difference now, is that the Black King is still on f8. This leads to the very simple zwichenzug:

<36.Qd6† Kg7 37.exf5 > ouch. Does Black have any alternative? Yeah, Nf5 opens up one more defense unavailable in the Rb8† line.

<35....Rc8> hey, that's mean. To be honest I have been looking quite a lot longer than one minute at this defense.

<36.Qd7!> threatening the Rook on c8. 36....gxf5 37.Qxc8† Kg7 38.Qxe5† is losing, so the Rook has to retreat. Lets consider Re8 best, keeping the Rook on defense (36....Rd8? 37.Qxd8† Bxd8 38.Rxd8‡ 1-0).

<36....Re8 37.Rb7> so simple, yet intruging. Forced doesn't always win.

<37....Re7 38.Rb8† Re8 39.Qd6† Be7 40.Qxe7† Kg8 41.Rxe8‡ 1-0>

<37....Be7 38.Qxe8†> through the other rank :)

<38....Kxe8 39.Rb8† Bd8 40.Rbxd8‡ 1-0>

<37....Qxd1†> desperate measures.

<38.Qxd1 gxf5 39.exf5 > and the Rook on h8 does not compensate for the ♕ / ♖+♗. Moves like 40.Qh5 end the game very soon. Time to check.

Feb-03-10  TheaN: 2/2

Not really what they were looking for (and I did look at Rb8 but doesn't Black stay in the game with Qxd1†?) but I'm guessing my line is good, right?

Oh wait, now I'm seeing the defending 36....Qc3!, which is very complicated: 37.Rc1! gxf5 38.Rb7 seems to win. Counting the point, even though Rb8 is much better. It's about Nf5.

Feb-03-10  cyclon: <YouRang: Actually, black wins: 35.Qxg5? Qxd1+ 36.Kb2 Qxc2+ 37.Ka1 Qd1+ 38.Kb2 Qe2+ (attacking Rb5) 39.Ka1 h6! (taking away Qh6+ threat) 40.Qe7+ Kg8 > Good point!
Nov-11-10  sevenseaman: ...34. Bxg5 is a pesky diversionary move, more in wishful hope than realism. 35. Nf5 is the crux that swings the game decisively for White. Its now easy to see baseline mate is at hand, whatever Black chooses to do.

Cheers to the new star Dominguez-Perez.

Premium Chessgames Member
  Domdaniel: To Moro ...
Jun-08-13  Xeroxx: black has no move.
Jan-31-15  SpiritedReposte: That is a pretty 1-2.
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