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Alejandro Ramirez Alvarez vs Ray Robson
US Championship (2012), St Louis, MO USA, rd 5, May-12
Tarrasch Defense: Classical. Reti Variation (D34)  ·  0-1
ANALYSIS [x]

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Kibitzer's Corner
May-12-12  310metaltrader: why 49 g4?
May-12-12  TheStormofWar: Robson with a gutsy and very farsighted rook sac. Fantastic play by black.
May-12-12  dbquintillion: <why 49 g4?>
Severe time pressure. Both sides were down to less than a minute at this point (plus increment). In the analysis room the perception was that the best try was 46. Kf1 but this seems to just be drawn (admittedly better than losing).
May-13-12  Poisonpawns: Ramirez missed a clear win after 41.c6 (instead of Rb4)and then several draws due to time pressure.Black played in a risky manner and was actually lost but it worked out I guess, such is chess.
May-13-12  King Death: < Poisonpawns: Ramirez missed a clear win after 41.c6...>

White's better after that for sure but I don't see a "clear win". On the tournament homepage I commented that there was some good technique in this round. This isn't one of the games that I was talking about, White fell apart after the time control. It can be tough to play though when you've let somebody off the hook and not be able to mentally adjust to the circumstances.

May-13-12  Jason Frost: <Poisonpawns: Ramirez missed a clear win after 41.c6...>

41. c6 Rd8 42. c7 Rd1+ 43. Kh2 Rc1 looks drawish, and it's not really clear which side is playing for the win


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May-13-12  kellmano: <310metaltrader: why 49 g4?> That was my first thought as I played thorugh this game. I really don't see how this is even a misguided attempt to play for a win. It just throws away a pawn and increases the opponents mobility. What plan did Ramirez think he saw?
May-13-12  Jason Frost: <kellmano> My guess is he thought he could just run around and grab the kingside pawns with 50. Kh2 (since before black could just play 50...Rh8+), before at the last second realizing just how strong 50...a4 is (when suddenly it's black with the pawns close to queening), and (correctly) bailing on the line. Of course that, and his later blunders, are probably attributable to time trouble. To me though, the most interesting question is why 34...Kg6 (not sure how much time Robson had here), which just looks to lead into a worse endgame?

It seems like instead, after 34...Re7, white doesn't really have anything, while black has a very comfortable position where he should be able to play for a win and can basically always bail with a bishop/rook trade on f3 anyway if he runs into trouble.

May-13-12  King Death: < Jason Frost: 41. c6 Rd8 42. c7 Rd1+ 43. Kh2 Rc1 looks drawish...>

In this line after 41.c6 Rd8 42.Rb3 looks like a better way to play for a win, then Black isn't able to get his rook behind the pawn. White can then play c7 and Rb7 to get the queen side going once he forces Black's rook to be passive.

May-13-12  Poisonpawns: Here is my analysis: First lets start at move 39.Rxb7? Black can force a draw on the spot with Rd8,


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because of the mate threat on d1 For instance if 40.Re1? then Rh8 is mate in 3. So white has to play 40.Kf1, and black forces the draw after Rd1+ 41.Re1 Rd5!


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White is forced to play Re3 again; for instance c6, is met by Rh5 and mate in 3. 42.Rc1 is met by Rh5 also 43.Ke1 Rh1+ 44.Kd2 Rxc1 45.Kxc1 e3! when white must give up his other rook


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May-13-12  Poisonpawns: How 41.c6 wins:Phase 1: immobilize the black rook 41.c6 Rd8 42.Rb3 Kf5 43.Rc3 Ke6 44.c7 Rc8


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Phase 2 Force King to assist weak rook
45.Kf1 Kd7 46.Ke1 Rxc7 47.Rxc7+ Kxc7 48.Kd2 f5


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Phase 3 While King is away attack kingside pawns 49.Ke3 Kd6 50.g4! and black is lost


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May-13-12  Zkid: <Poisonpawns> In your final position 50...fxg4 51. Kxe4 g3 52. Kxf3 gxf2 53. Kxf2 is a draw (check http://www.k4it.de/index.php?topic=... for yourself)
May-13-12  Jason Frost: <King Death: < Jason Frost: 41. c6 Rd8 42. c7 Rd1+ 43. Kh2 Rc1 looks drawish...> In this line after 41.c6 Rd8 42.Rb3 looks like a better way to play for a win, then Black isn't able to get his rook behind the pawn. White can then play c7 and Rb7 to get the queen side going once he forces Black's rook to be passive.>

Only important fact here, <rook endgames are always drawn>!!!!!

Really though, 42.Rb3 is pretty nice and certainly white is playing for the win, but black has a lot of resources to play for a draw and still very complicated in my opinion, as good old tablebase shows above.

May-13-12  Poisonpawns: <Zkid> Good catch.I stand corrected.Amazing.
Jun-24-12  Poisonpawns: http://www.youtube.com/watch?v=tpyU... Video Analysis
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