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Pavel Eljanov vs Aleksandr Lenderman
World Cup (2017), Tbilisi GEO, rd 1, Sep-03
Nimzo-Indian Defense: Classical Variation (E32)  ·  0-1
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Sep-03-17
Premium Chessgames Member
  Keyser Soze: 52. Re2??
Sep-03-17  zoren: That's a painful way to lose.
Sep-03-17
Premium Chessgames Member
  ChessHigherCat: <Keyser Soze: 52. Re2??>

What should he have played instead? If 52. e7 Nxe7. If 52. Nf5 Rxe6+

Sep-03-17  JPi: Eljanov played beautifully until this incredible mistake 54.Rd2??? simply 54.RxN fxR 55.Nf5 Rd2 (Else Ke2)56.Nxe3 Rb2 57.Nf5 and Kd1-Kc1 1-0 One could be practical but I'm not a fan of time pressure winning process. On the board it was until this disastrous move a strategical domination.
Sep-03-17  Sally Simpson: A pie full of Knights Forks.

Here is White using a Knight fork to win back a Rook and pocket a pawn.


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White played 42.Nxe6+ then took the c7 Rook as it was the more active of the two.

Then twice White tried to snare Black with an exchange winning Knight Fork


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White played 45.e6+ if 45...Kxe6 then 47.Nc7+

And 6 moves later.


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White played 53.e7 and if 53...Kxe7 then 54. Nf5+

White then forgot that his opponent too can play Knight forks and here...


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...stumbled with 54.Rd2 Rxd4

I see 52.Rd2 has been awarded '???' I'm thinking 54.Nf5 or 54.Nc2 were worse as it allows mate in two. Alas having spotted that pitfall White jumped into another.

Apparently 'simply' 52.Rxe3 wins. (and the box jockeys everywhere will be asking themselves and then telling us: "How did White not see that?")

Is there anything else White could of tried?


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How about 52.Rb2 Rxd4 53.b6


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The e7 pawn stops Rd8. Black is going to have to give up his Rook to stop that b-pawn.

Infact giving up the Rook is the only way Black can win from there.

55...Rb4!


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56.Rxb4 Nc7+ then Nxb4 and Nc6.

I told you this was a pie full of Knight Forks.

Sep-03-17
Premium Chessgames Member
  HeMateMe: Lets hear it for the boy, New Yorker Lenderman! tricky endgame.
Sep-04-17
Premium Chessgames Member
  luzhin: Actually, there were two huge blunders by Eljanov, both with the same piece. He was winning with any King move on move 52, but 52. Re2?? made Ne3 into a monster because it meant that if the Nd4 moves Black then has Rd1+ and Rf1 mate! This meant that 54.Rxe3 was essential, as 54.Rd2?? allows the forking combo.
Sep-04-17
Premium Chessgames Member
  patzer2: <luzhin: Actually, there were two huge blunders by Eljanov, both with the same piece.> Yes Indeed!

White misses a sure win with <52. Re2?>, allowing Black a level position after 52...Ne3 = (0.00 @ 35 depth, Stockfish 8.)

Instead of <52. Re2?>, Stockfish 8 indicates White has at least three winning alternatives, including 52. Kf1 (+5.82 @ 35 depth,) 52. Kd1 (+4.50 @ 35 depth,) or 52. Ra2 (+4.45 @ 35 depth.):

( [Stockfish 8 64] 35:+5.82 52.Kf1 Ne3+ 53.Ke2 Nc4 54.Rd3 Nb2 55.e7 Kf7 56.Rb3 Rxd4 57.b6 Rd7 58.e8=Q+ Kxe8 59.b7 Re7+ 60.Kf1 Rxb7 61.Rxb7 Nc4 62.Ke2 Nd6 63.Rb6 Ke7 64.Kd3 Kd7 65.Kd4 Ke6 66.Ra6 Ke7 67.Ke5 Nc4+ 68.Kf5 Nd2 69.Rxh6 Nxf3 70.Rh7+ Ke8 71.Ra7 Kf8 72.Kf6 Kg8 73.Ra3 Nd4 74.Rd3 Nc6 75.Kxg5 f3 76.Rxf3 Nd4 77.Rf6 )

( [Stockfish 8 64] 35:+4.50 52.Kd1 Rd8 53.Ke2 Ra8 54.Rb2 Nb6 55.Rc2 Nd5 56.Rc5 Ke5 57.Nf5 Ra2+ 58.Ke1 Kxe6 59.Nxh6 Nb4 60.Rxg5 Nd3+ 61.Kf1 Ne5 62.Rf5 Ra1+ 63.Ke2 Ra2+ 64.Kd1 Nxf3 65.Rxf4 Ng5 66.Rb4 Ra7 67.Nf5 Rb7 68.b6 Nh7 69.Ke2 Nf6 70.Kf3 Nd5 71.Rb5 Nxb6 72.g5 Rd7 73.g6 Nc4 74.Kg4 Kf6 75.g7 Kf7 76.h6 Rd3 )

( [Stockfish 8 64] 35:+4.45 52.Ra2 Nc7 53.Ra7 Nxe6 54.Nf5 Rd5 55.Ra6 Rd3 56.Rb6 Ke5 57.Nxh6 Nd8 58.Ke2 Re3+ 59.Kf2 Rb3 60.Rg6 Rb1 61.Rxg5+ Kf6 62.Rg6+ Ke5 63.Ke2 Ne6 64.Nf5 Nf8 65.Rg8 Nh7 66.Rg7 Nf8 67.Rb7 Ne6 68.h6 Ng5 69.Re7+ Kf6 70.h7 Rh1 71.b6 Rh2+ 72.Kd3 Rxh7)

After missing the win with <52. Re2?,> White throws away drawing chances with <54. Rd2??,> allowing the winning Knight fork combination 54...Rxd4 55. Rxd4 Rxd4 56. Nc7+ -+ (mate-in-28, Stockfish 8 @ 51 depth) or the win of a piece after the game continuation 54...Rxd4 55. Rb2 Rd7 -+ (-5.31 @ 34 depth, Stockfish 8.)

Instead of 54. Rd2??, White can secure a level position with 54. e8=Q+ Kxe8 55. Rxe3+ fxe3 56. Nf5 = (0.00 @ 45 depth, Stockfish 8) or 54. Rxe3+ fxe3 55. e8=Q+ Kxe8 56. Nf5 = (0.00 @ 45 depth, Stockfish 8.)

P.S.: I use games like this to encourage my young Grandsons when they miss wins or draws in their tournament games. I tell them everyone makes mistakes in Chess, even the very best players. The important thing is to learn from our mistakes, so we can improve and avoid similar mistakes in the future.

Sep-27-17  Sally Simpson: There was another wee piece of magic in this game. White to play.


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50.Rd2

At first glance Black take the Knight because surely the King and Knight catch the pawns.

50. Rd2 Rxd4 51. Rxd4 Kxd4 52. b6 Kd5 53. b7


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And to catch the b-pawn The Black Knight has to let the prisoner on e6 free.

53..Nc6 54.e7


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Black's consolation is he gets to choose which pawn promotes.

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