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Robert James Fischer vs Mijo Udovcic
Rovinj / Zagreb (1970), Rovinj / Zagreb YUG, rd 12, Apr-28
Modern Defense: Pseudo-Austrian Attack (B06)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
Dec-29-04  Whitehat1963: Fischer toys with the player of the day.
Dec-29-04  e4Newman: At no point was Fischer in any trouble here, even trading a rook for two minor pieces.
Dec-29-04  Granite: I prefer to think of it as winning two minor pieces for a rook, since they have a much higher success rate then then lone rook. It's a trade I happy take anytime I can get it!
Jul-13-07  TaxiDriver: Fischer did to this guy like Joe Louis did to many a fighter with his bum of the month campaign. lol
Mar-11-12
Premium Chessgames Member
  plang: 16..Be6!? was clever to get the knight out of d5; perhaps he needed to follow up with 17..Bd7 and ..Bc6. After 18 Rg1 White wins material.
Mar-11-12  ephesians: What would be the consequences of 9...Qxd1+ 10. Rxd1 Rd8?


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It appears that black is at least as well developed as white.

Mar-11-12  JoergWalter: maybe 11.Rxd8+ Nxd8 12.g5
Mar-11-12  ephesians: Ok, 11. Rxd8+ Nxd8 12. g5 Nh5


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If 13. f6, then 13.... Bf8.

Maybe black is ok.

Mar-13-12  JoergWalter: 12.g5 Nh5 13.f6 Bf8 14.Nf3
Mar-13-12  ephesians: Ok, 11. Rxd8+ Nxd8 12. g5 Nh5 13. f6 Bf8 14. Nf3 Be6:


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Idea: if 15. Nxe5 Ng3 (idea: 16. Rh2 Bd6 17. Bf4 Nh5 or 16. Rg1 Nxf1 17. Rxf1 Bxh3

Maybe black is ok.

Jan-02-20
Premium Chessgames Member
  Mateo: 17...Rad8?! was simply awful. And as <plang> suggested Udovcic should have played 17...Bd7.
Jan-02-20
Premium Chessgames Member
  AylerKupp: FWIW after 11.Rxd8+ Nxd8 12.g5 Nh5 13.f6 Bf8 14.Nf3 Be6


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Stockfish 10 evaluates the resulting position for its principal variation at [+1.44], d=39: after 18.Nxe5 Ng3 19.Rg1 Nxf1 20.Kxf1 Bd6 21.Ng4 Nc6 22.Nh6+ Kf8 23.Kg2 Rd8 24.Rd1 Be5 25.Nd5 b6 26.c3 Na5 27.Rd3 Nc4 28.Bc1 Rd7 29.Ng4 Bd6 30.b3 Bxg4 31.hxg4 Ne5 32.Rd1 c6 33.Nf4 Bc7 34.Rxd7 Nxd7 35.Ne2 Ke8 36.Bf4 Bxf4 37.Nxf4 Ne5 38.Ne2 Nxg4 39.Kg3


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Material is even and White has a space advantage but this is not as significant in an endgame position such as this one. And with knights on the board the possibility of zugzwang is reduced. So I don't think that White stands significantly better as indicated by Stockfish's evaluation. Indeed, restarting the analysis from this position Stockfish evaluates the resulting position at [+0.97], d=39 after 39...Ne5 40.Kf4 Nd3+ 41.Ke3 Ne5 42.Nf4 Ng4+ 43.Ke2 Kd7 44.Nd3 h5 45.Kf3 (now the position seems drawish since White's king can't stray too far from the k-side and still prevent Black's h-pawn from queening, particularly if the knights are exchanged) 45...c5 46.Kf4 Ke8 47.e5 Kd7 48.Ke4 Kd8 49.a3 Kd7 50.Kf3 Nh2+ 51.Kg2 Ng4 52.Kg3 Ke8 53.Kf4 Kd7 54.Ke4 a6 55.Nf4 Ke8 56.a4 a5 57.e6 fxe6 58.Nxg6 (see Note 1) 58...Nf2+ 59.Ke5 Nh3 60.Kxe6 Nxg5+ 61.Kf5 Nf3 62.Nf4 h4 63.Kg4 Nd2 64.Nd5 Ne4 65.Nxb6 Kf7 66.Nc4 Kxf6 67.Kxh4 Ke6 68.Nxa5 Nxc3


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Stockfish is on the threshold of evaluating the position as White having either a slight or significant advantage. White <may>win but it's not certain, and probably not even likely, assuming, of course, reasonably accurate play by both sides. However, this position is a draw per the Lomonosov tablebases.

Note 1: The position after 58.Nxg6 seems advantageous for White.


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White has 2 connected passed pawns compared to Black's 2 unconnected passed pawns and Black's Ph5 can be easily blockaded. However, starting the analysis from this position results in Stockfish evaluating the resulting position as even, consistent with the Lomonosov tablebase determination: [0.00], d=38: 5...Nf2+ 59.Ke5 Nh3 60.Kxe6 Nxg5+ 61.Kf5 Nf3 (here Stockfish deviates from its early "best" line) 62.Nf4 h4 63.Kg4 Nd2 64.Kxh4 Ne4 65.Kg4 Nxf6+ 66.Kf5 Ke7 67.Ng6+ Kf7 68.Ne5+ Ke7 69.Nc4 Nd7 70.Ke4 Ke6 71.Kf3 Ne5+ 72.Kf4 Nxc4 73.bxc4 Kd6 74.Ke4 Kc6 75.Ke5 Kd7 (I would have assumed that 75...Kc7 maintaining the opposition would be better, but apparently Stockfish doesn't know this endgame "rule" :-) ) 76.Kd5 Kc7 77.Ke6 Kc6


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Now, with Black finally getting the opposition, the draw is inevitable. Then again, the game took a different path than 11.Rxd8+. And, unfortunately, I just broke my New Year's resolution of shortening my posts.

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