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Boris Savchenko vs Vladimir Belov
Russian Club Cup (2006), Sochi RUS, rd 4, Apr-23
Sicilian Defense: General (B20)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
May-07-06  notyetagm: Savchenko uses Zvjaginsev's anti-Sicilian 2 ♘a3!? to score a fine victory with the concluding blow 33 ♖f8+!:

33 ... ♗xf8 <pinning theme> 34 ♕h7#

33 ... ♔xf8 <decoy for tempo> 34 ♕e7+ ♔g8 35 ♕f7+ ♔h8 36 ♕h7#

Notice the awesome mating power of the White b7-rook, which controls all of the critical checking/mating focal points e7, f7, and h7 along the 7th rank.

May-07-06  notyetagm: I really like the mating line that begins 33 ♖f8+! ♔xf8 34 ♕e7+.

<White sacrifices a whole rook(!) just to be able to double his remaining two heavy pieces on the 7th rank with tempo>. That is, since Black must meet the threat of 35 ♕x♔, he has no time to meet the secondary threat of 35 ♕f7+ and 36 ♕h7# because he must get out of check.

Contrast this with the immediate 33 ♕e7, which threatens only the mate along the 7th rank. Since there is no check, Black needs to meet only this single threat, which he can do with 33 ... ♖g7. This defensive idea ... ♖g7 is not available to Black in the rook decoy line because it does not get the Black king out of check, hence the point of the decoy.

So 34 ♕e7+ forces mate because it lets White double heavy pieces along the 7th rank <with tempo (for free)> while 33 ♕e7 does not force mate because the doubling of the White heavy pieces is not free of charge.

Aug-15-11  MPU: Ironically, the simple Rb8+ seems to mate quicker.
Kg7 Qe7#
Bf8 Rfxf8 Kg7 Qh8#
Qd8 Qxd8+ Bf8 Qxf8 Kh7 Qh8#
Kh7 Rf7+ Rg7 Qe4#

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