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Vasily Smyslov vs Mikhail Botvinnik
Botvinnik - Smyslov World Championship Match (1954), Moscow URS, rd 15, Apr-17
Formation: King's Indian Attack (A07)  ·  0-1
ANALYSIS [x]

FEN COPIED

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Given 20 times; par: 54 [what's this?]

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Kibitzer's Corner
Nov-22-07  Cactus: Beauty of a game!
May-26-08  notyetagm: Black to play: 20 ... ?


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Here Botvinnik (Black) snatches a pawn in broad daylight with 20 ... ♘f5xh4!, using the tactic <DISCOVERED DEFLECTION>.

Position after 20 ... ♘f5xh4!


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<DISCOVERED DEFLECTION>: Use the masking piece (Black f5-knight) to exploit the <LOOSENESS> (White f4-knight) created by the unmasking of the rear line piece (Black f6-queen) by taking what the newly <OVERWORKED> defender (White g3-pawn) no longer defends (White h4-pawn, 20 ... ♘f5xh4!).

Botvinnik saw in the first position that without his Black f5-knight <BLOCKING> the f-file from the Black f6-queen to the White f4-knight, that the White f4-knight would be <LOOSE>, with two Black attackers (Black f6-queen and h6-bishop) versus two White defenders (White d2-queen and g3-pawn). Since there would be an equal number of Black attackers (2) as White defenders (2), these two White defenders would be automatically <OVERWORKED>, <<<meaning that some squares would only -appear- to be <DEFENDED> (--)>>>.

So, since the White g3-pawn would have to <DEFEND> the White f4-knight if the Black f5-knight were not <BLOCKING> the f-file, the White g3-pawn could not then -also- <DEFEND> the h4-pawn, hence 20 ... ♘f5xh4!.

<DISCOVERED ATTACKS> that make things <LOOSE> are dangerous, dangerous, dangerous!

Oct-22-08  Whitehat1963: Third black win in a row in this match. How often has that happened in the history of championship matches?
Aug-12-11  Ulhumbrus: The move 15 Bf2 is a sign that things have gone wrong for White, as White obstructs his own Rooks on the f file with his Queen's Bishop.
Sep-10-13
Premium Chessgames Member
  zydeco: The Closed Sicilian was not Smyslov's friend in this match. Spassky finds the key for white in this variation (in 1990!): 8.Bg5 with the idea of Bf6!

16.b4 might have been worth a try, to widen the playing field. Black already seems significantly better even before 20....Nxh4!

Sep-18-14  croatia92: 22.. Ke6 win R or Q. Did you see combination. Explain. Thanks
Sep-18-14  croatia92: 23.. Ne6 white
Jan-17-15  Markov47: <croatia92> As Botvinnik notes in his book <<Three Matches>> "... after 23... Bxe3! 24. Qxe3 Qxd5 White's position is hopeless".
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