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Wesley So vs Fabiano Caruana
World Championship Candidates (2018), Berlin GER, rd 8, Mar-19
Russian Game: Cozio (Lasker) Attack (C42)  ·  1/2-1/2
ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 9 OF 9 ·  Later Kibitzing>
Mar-19-18  sadow: RxN very interesting
Mar-19-18  Pedro Fernandez: <<Marmot PFL>: 48 Nxc4 was easier draw but I don't think So will mess up this game.> You're right! It continues being draw, though.
Mar-19-18
Premium Chessgames Member
  cocker: 49 ... Nf3
Mar-19-18
Premium Chessgames Member
  HeMateMe: well, you can't win a game Rook v. N can you? if not, it's a draw.
Mar-19-18
Premium Chessgames Member
  cocker: Sorry, 49 ... Rook f3
Mar-19-18
Premium Chessgames Member
  mjmorri: Yes you can if the Knight becomes separated from the King.
Mar-19-18  Petrosianic: <Marmot PFL: Judit says draw, so far I think I agree.>

Probably, but Judit lost a R vs. N ending herself once.

Mar-19-18
Premium Chessgames Member
  HeMateMe: isn't that almost a helpmate, separating the king and Knight?
Mar-19-18
Premium Chessgames Member
  centralfiles: It's adraw with a b pawn a win with a pawn.
See Carlsen vs Anand, 2014 Lasker vs Ed. Lasker, 1924
Mar-19-18
Premium Chessgames Member
  cocker: Maybe White can hold it after all, but he has to be careful
Mar-19-18  WorstPlayerEver: Hmmm.. I put Wesley off ignore. Let it be a lesson.
Mar-19-18
Premium Chessgames Member
  morfishine: White King must go to <f2> and avoid h-file where death awaits
Mar-19-18  Nosnibor: Was 44 Ng2 a mistake ? 44 Ke3 appears to be stronger.
Mar-19-18
Premium Chessgames Member
  AylerKupp: Per the Lomonosov tablebases, the position after 49.Nxc4 is a theoretical draw. Both players played according to the tablebases (i.e. perfectly) until 53...Rd3 when the tablebases suggested 53...g2, but the position was still considered a theoretical draw. The tablebases also preferred 54...g2 instead of 54...Rb3, 55...Rd3 instead of 55...Kd5, 56...g2 instead of 56...Kc4, 57.Ng2 instead of 57.Kg4, 57...g2 instead of 57...Rd3, 58.b3 instead of 58.b4, 58...g2 instead of 58...Rb3, 59...g2 instead of 59...Kd5, 59...g2 instead of 59...Ke4, 62...Ra7 instead of 52...Rg7+, 63.Kh3 instead of 63.Kf2, 63...Rf7+ instead of 63...Rg4, 64...Rf4+ instead of 64...Rxg2+ (although, of course, it amounts to the same thing), and 65...Kf4 instead of 65...Ke5. But at no time was the position evaluated by the tablebases as anything but a draw.

And the tablebases from Black's perspective sure wanted to give up that g-pawn! I can only guess that, given that the tablebases considered all the positions to be a draw, they wanted to reach a minimum material position (kings only) as quickly as possible.

Congratulations to both players for near perfect endgame play, but particularly to So since he was the one with the material disadvantage and one misstep would likely have led to a loss. In fact, in several positions if it has been Black to move instead of White, the tablebases indicated that the position was a theoretical win for Black.

Mar-19-18  Pedro Fernandez: I didn't like 26...Rb8


click for larger view

I don't see any good idea with this move.

Mar-19-18
Premium Chessgames Member
  An Englishman: Good Morning: Can't deny the players fought hard and took risks. Both have a right to feel a little frustrated that their hard work led to "only" a draw.
Mar-19-18  sudoplatov: Well, the Petrov is drawish.
Mar-19-18  WorstPlayerEver: I think it was a great game. Although I had no clue what they were doing.
Mar-19-18
Premium Chessgames Member
  Breunor: Pedro,

I think 26. Rb8 sets up the trap of the white night on b7 that forced white to give up the exchange to save it. Stockfish shows it as the best move.

Mar-19-18
Premium Chessgames Member
  offramp: That was a superb game.
Mar-19-18  Ulhumbrus: 23 Rxe8+ concedes the e file to Black. 24 Bxb6 concedes the bishop pair. 25 Nb7 gets the knight into trouble. After this So defends well and saves himself, but why does he need to get into trouble at all? Instead of 23 Rxe8+, 23 g3! forces the N on f4 to move so as to relieve White of the pressure on the d5 pawn and so free White's pieces to move.
Mar-19-18
Premium Chessgames Member
  Penguincw: < Mar-18-18 Penguincw: ... I'm going to predict a draw here. ... >

Yay.

Mar-19-18  RookFile: The endgame bring to mind this famous effort by Emanuel Lasker to hold a tough endgame.

Lasker vs Ed. Lasker, 1924

Mar-20-18
Premium Chessgames Member
  ChessHigherCat: <Breunor: The engines agree with Cocker; Stockfish had 48 Nx c4 as dead drawn but it has 48 d6 as lost after Ke6.>

Maybe but it takes extremely precise play with an underpromotion and still goes on for over 20 moves!:

1) -1.92 (39 ply) 49.Nxc4 Rf3 50.d7 Rf8 51.Ne3 g3 52.d8=N+ Rxd8 ....

Mar-23-18  SEVEN: To be honest I cant unterstand the meaning on black;s 65 ..... Ke5 lol
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