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Vladas Mikenas vs Anatolij Bannik
USSR Championship (1957), Moscow URS, rd 10, Feb-03
Caro-Kann Defense: Advance. Bronstein Variation (B12)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Apr-28-20
Premium Chessgames Member
  watwinc: First?
Apr-28-20
Premium Chessgames Member
  An Englishman: Good Evening: Good old Mikenas--can always count on him to find an unusual tactical resource. 29.Bc1 with the threat of Qxe4 proved a clever little trick to induce the attempted counter 29...Qe8. White's final move threatens 32.Qf5X or Qg6X.

Black might have tried 7...Nd7 or 7...Bxc5.

Apr-28-20
Premium Chessgames Member
  agb2002: Black threatens Qxd7.

White can keep the rook on d7 with 30.R1xd5:

A) 30... exd5 31.Qxg4

A.1) 31... Qe6 32.Qg6#.

A.2) 31... Qxd7 32.Qxd7 + - [Q+N+P vs 2r].

B) 30... h5 31.Qxe4 wins a piece and a pawn (31... exd5 32.Qf5#).

Apr-28-20  saturn2: <An Englishman White's final move threatens 32.Qf5X or Qg6X.> 32 Qg6 is not mate because of the black queen.
Apr-28-20  TheBish: Not too difficult, but not too easy for a Tuesday.
Apr-28-20  Brenin: <saturn2> 32 Qg6 is the alternative mate if Black stops the mate on f5 with 31 ... Qe6.

After 30 R1xd5 Black's only realistic alternative was a humiliating return to h5 with 30 ... Qh5, allowing 31 Rxe5 and 32 Bf4 with a devastating attack.

Apr-28-20  mel gibson: I didn't see that.

Stockfish 11 says mate in 24 which I
don't think you could call easy?

30. R1xd5

(30. R1xd5 (♖d1xd5 e6xd5 ♕e2xg4
♕e8xd7 ♕g4xd7 ♖a8-e8 ♕d7-f5+ ♔f6-g7 ♕f5-g6+ ♔g7-f8 ♘h4-f5 ♖e8-e7 ♗c1-e3 ♖h8-g8 ♗e3xh6+ ♖g8-g7 ♗h6xg7+ ♖e7xg7 ♕g6-e6 d5-d4 ♕e6xe5 ♖g7-d7 ♕e5-e6 ♖d7-a7 ♕e6-f6+ ♔f8-e8 ♕f6-e5+ ♔e8-f7 ♕e5-g7+ ♔f7-e6 ♘f5xd4+ ♔e6-d6 ♕g7xa7 b5-b4 ♕a7xa6+ ♔d6-e7 ♕a6-e6+ ♔e7-d8 ♕e6-d6+ ♔d8-c8 ♘d4-e6 ♔c8-b7 ♘e6-c5+ ♔b7-a8 ♕d6-a6+ ♔a8-b8 ♕a6-b7+) +M24/64 245)

Apr-28-20  TheaN: <mel gibson: I didn't see that. Stockfish 11 says mate in 24 which I
don't think you could call easy?>

Interesting point how our deduction goes. Would it have been easier if it said +10? In the end that usually comes down to about #20-30 also, yet when the evaluation goes beyond +5 on a usual Tuesday we all say "and a win" without any real evaluation of the quickness of the mate etc. One flows into the other naturally.

This puzzle in itself is a proper deduction. We can't save Rd7 with the exception of one move, that move is a sacrifice but followed by a killer that justifies said sacrifice. So besides looking for direct queen sacs I saw this and went for it immediately.

<30.R1xd5> protects Rd7 so Black will pretty much have to take on d5. Any alternative will just fuel White's attack a piece down.

<30....exd5 31.Qxg4> and due to the dual threat of Qf5# and Qg6# Black's forced to <31....Qxd7 32.Qxd7 +-> but the attack isn't over and Be5 is in huge peril, and only trying to save it goes at the cost of d5 and a relatively simple game will follow for White.

Apr-28-20
Premium Chessgames Member
  pittpanther: I found this pretty tough for a Tuesday, was more like Wednesday level in my opinion. But maybe i am a bit slow today :)
Apr-28-20
Premium Chessgames Member
  chrisowen: Judge and Jury?
Apr-28-20  spazzky: triple threat of either Qf5#, Qg6#, or Qg7#
Apr-28-20  zb2cr: A cool way to end. White threatens mate at f5, g6, or g7, depending on how Black plays.
Apr-28-20  AlicesKnight: Found the correct route. Black can play ...h5 but Qxe4 leaves no real chance.
Apr-28-20  mel gibson: <Interesting point how our deduction goes. Would it have been easier if it said +10? In the end that usually comes down to about #20-30 also, yet when the evaluation goes beyond +5 on a usual Tuesday we all say "and a win" without any real evaluation of the quickness of the mate etc. One flows into the other naturally.

This puzzle in itself is a proper deduction. We can't save Rd7 with the exception of one move, that move is a sacrifice but followed by a killer that justifies said sacrifice. So besides looking for direct queen sacs I saw this and went for it immediately.>

There were many other places to move the Rook on d7. e.g place it on g7 and if the King takes it then Qxg4+. Also Rook on d7 to take the Knight which still wins! Then simply Qxg4 - leads to a draw but still had to be tested.

There are many lines to investigate before
choosing the best move - which is -
the one that leads to checkmate in 24 moves.

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