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Romain Edouard vs Thomas Casper
Bundesliga (2009/10), Erfurt GER, rd 5, Dec-12
Old Indian Defense: Normal Variation (A55)  ·  0-1

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Feb-05-19
Premium Chessgames Member
  Jimfromprovidence: The white king could never help.

Put the king on c2 instead of g2 at the puzzle position and see if it makes a difference.


click for larger view

Black to play.

Feb-05-19  devere: The position after 60...a3 is comical, unless you were playing White.
Feb-05-19  saturn2: I saw 59...Rxb5 60. cxb5 a3

Possible follow up:

61. Kf2 Kxb5 62. Ke2 Ka4 63. Kd3 Kb3

Feb-05-19
Premium Chessgames Member
  agb2002: Black has a bishop and a pawn for a knight.

White threatens Rxb2 and Nxd6.

The white king is too far from the queenside. This allows 59... Rxb5 60.cxb5 (60.Rxa4+ Kxa4 61.cxb5 Kxb5 - + [b+p]) 60... a3 61.b6 Kxb6 62.Kf2 Kb5 63.Ke2 Kb4 64.Kd2 Kb3 winning decisive material.

Feb-05-19
Premium Chessgames Member
  agb2002: <Jimfromprovidence: The white king could never help.

Put the king on c2 instead of g2 at the puzzle position and see if it makes a difference.>

Interestingly, it makes not: 59... Rxb5 60.cxb5 a3 61.b6 Kxb6 and the black king will invade White's field through c4 or, after Rxb2, will win the pawn ending due to the passed c-pawn.

Feb-05-19
Premium Chessgames Member
  drollere: Rxb5; 60. cxb5 Bd4 probably wins as well, as black gets 2 passed pawns and one of them will cost the R.
Feb-05-19  Walter Glattke: Rook catching, 61.b6 Kxb6 62.Kf2 Kb5 63.Ke2 Kb4 64.Kd3 Kb3 or 64.Rxb2+ axb2 65.Kd2 a1Q
Feb-05-19  AlicesKnight: The game continuation was not too hard to see. The R is on ice.
Feb-05-19
Premium Chessgames Member
  Stonehenge: 56.axb4+ cxb4 57.c5 would have been interesting.
Feb-05-19  cocker: <drollere> not so. After 60 … Bd4, White gets the advantage with 61 b6 Kxb6 62 Rxa4.
Feb-05-19  rudiment: I saw 60... Rxb5 but I didn't see the rest of the game line. I went with 61... Kxb5, reasoning that White doesn't have the resources to stop both passed pawns.
Feb-05-19  malt: Have 59...R:b5 60.cb5 a3 61.Kf2 K:b5
Feb-05-19  TheaN: Tuesday 5 February 2019

<59....?>

Obviously, Black can snare the rook and should go for the immediate win with <59....Rxb5 60.cxb5 a3 -+> and now I believe any sequence of moves should win except for a bishop move.

Typically though Black has two distinct plans.

The easiest plan works because the White king's too far away: 61.Kf2 (or 61.b6 Kxb6 62.Kf2) Kxb5 62.Ke2 Kb4 63.Kd2 Kb3 -+ and Black already captures the helpless rook.

The second plan is to defend the bishop another time, putting White in principle zugzwang with 61.Kf2 c4 62.Ke2 c3 and Black can just pick up b5 and invade over the light squares.

However, as mentioned, Black is two pawns up and the pieces snare each other, so Black can also just invade at leisure as long as White doesn't reach b5 (where he has repetition with Ka5-Kb5).

Feb-05-19  TheaN: To make this concept clear, Jim already put the White king on c2, but lets assume from the end position Black captures on b5 and shuffles three times:

61.Kf2 Kxb5 62.Ke2 Ka5 63.Kd2 Kb5 64.Kc2 Ka5 65.Kb3 Kb5:


click for larger view

Still won as Black will always play Kc4, with or without PxR and KxP inbetween. Even with White opposition: 66.pass Ka5 67.Rxa3 (Kc4 Ka4) Bxa3 68.Kxa3 c4, and Black will be able to pick up f3 and e4 or g4 without risk

Feb-05-19  zb2cr: Clever. 59. ... Rxb5; 60. cxb5, a3 and White's Rook is confined in a unusual cage. White's King cannot get across in time to control b3, so White can't even sacrifice his Rook for the Bishop and take the Pawn. Not that that matters, as <Jimfromprovidence> points out.
Feb-05-19  Cheapo by the Dozen: While I agree that this puzzle is Tuesday-easy, the OBVIOUS indisputable winning line I found is rather long.

Part 1: The two moves trapping the rook.

Part 2, especially if White gains a tempo by pushing the b-pawn: March the c-pawn to c3.

Part 3: King to c4, and then to whichever of b3 or d3 White leaves truly open, avoiding the stalemate trap in which Black plays ... Kb3 with White's king at b1.

Feb-05-19
Premium Chessgames Member
  thegoodanarchist: There was really only 1 line to analyze. Very easy, probably Monday level
Feb-05-19
Premium Chessgames Member
  thegoodanarchist: Casper wasn't so friendly to White.
Feb-05-19  patzer2: <Jimfromprovidence> Thanks for posting the instructive position (below)


click for larger view

with the King on c2 (59. ?) instead of g2.

In attempting today's Tuesday puzzle (?), I went with the game continuation 59...Rxb5 60. cxb5 a3 -+ for my solution.

However, I found myself attempting to calculate whether Black could keep the White King from reaching c2. Yet, as your instructive puzzle position demonstrates, it doesn't make any difference. Black wins even if the White King could reach c2.

P.S.: So where did White go wrong? White's decisive mistake was 57. Nb5??, allowing 57...Bxa3 -+ (-4.01 @ 30 ply, Stockfish 10). Instead, 57. Kf1 or 57. Ne6 or almost any other move other than 57. Nb5?? holds it level.

Two moves earlier, instead of playing the tempting but flawed pinning attack 55. a3? Ka5! =, White could have held a strong and likely winning advantage with 55. Rh1 Bc3 56. Rh7 ± to +- (+2.43 @ 34 ply, Stockfish 10).

Feb-05-19  1stboard: The king will eat a rook .....
Feb-05-19
Premium Chessgames Member
  eternaloptimist: I solved this puzzle really quickly. It is easy indeed.
Feb-05-19  Sniffles: Now that's a cute little trap and makes up for yesterdays no brainer. A passed pawn and no way to stop it.
Feb-05-19  landshark: <Patzer2> Nice to see you posting again! Informative as usual -
<Jim>, <Thea N> likewise. Learned something from this one
Feb-05-19  NBZ: As <patzer2> pointed out, White erred with 55. a3? Ka5! (though methinks he ought to have still taken the bishop and tried to sac his knight for the pawns).

Which means 54. ... Kb6! was a very clever trap in an otherwise close-to-lost position.

Feb-05-19  Diana Fernanda: Love a all Worlds
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