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Camilla Baginskaite vs Ana-Cristina Calotescu
37th Chess Olympiad: Women (2006), Turin ITA, rd 4, May-24
King's Indian Defense: Orthodox Variation. General (E91)  ·  1-0



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sac: 26.Nxg5 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
Jun-19-06  notyetagm: White To Play: 32 ?

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Black has just blundered with 32 ... ♘xb3?, totally missing White's threat.

White would like to play ♖f6-f8#, a rook and bishop mate. Only the Black g7-knight prevents this, by <BLOCKING> the diagonal h6-f8 of the White h6-bishop.

So the Black g7-knight is <PINNED> to the h6-f8 diagonal. Then which Black piece defends the e8-square? None! The e8-square is undefended because the Black g7-knight cannot go there, since that would allow the aforementioned rook and bishop mate.

<The defensive power of a pinned piece is merely illusory, Nimzowitsch said.> The Black g7-knight, pinned to the h6-f8 diagonal, only pretends to defend the e8-square.

Note that the Black g7-knight has two ways of meeting the threat of ♖f6-f8#. The knight can stay on g7 where it <BLOCKS> the h6-f8 diagonal. -Or- it can move to the e6-square, from where it <DEFENDS> the f8-mating focal point. So the Black g7-knight, in order to meet the rook and bishop mate threat against f8, must stay on g7 or go to e6. But there is no way the Black g7-knight can meet the mating threat if it goes to e8, so it -cannot- go to e8.

32 ♖e8+! ♘xe8 33 ♖f8#

Jun-19-06  notyetagm: 26 ♘xg5! since <BLOCKADERS DO NOT DEFEND, THEY BLOCKADE>. The Black f6-pawn must <BLOCKADE> the White f5-pawn to stop the <PAWN FORK> f5-f6. Hence the Black f6-pawn cannot also defend the Black g5-pawn since it must stay put on the f6-blockading square.

26 ♘xg5! fxg5 27 f6

Jun-19-06  notyetagm: With 6 ... ♗g4 and 7 ... ♘fd7, Black is actually playing a Reversed KIA! That is, this line is what White can play in the KIA can confronted witht the Reversed KID.
Aug-26-06  watergun7: This is actually a black line that white can play in "reversed" KID, otherwise known as KIA... lol. Not the other way round!
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Featured in the Following Game Collections[what is this?]
32 Re8+! Black g7-knight pinned to h6-f8 cannot also defend e8
from Pins! Exploit every pin!!! by trh6upsz
Black plays a Reversed KIA with 6 ... Bg4 and 7 ... Nfd7
from KIA rules by Patca63
26 Nxg5! since Black f6-pawn must blockade White f5-pawn
Black plays a Reversed KIA with 6 ... Bg4 and 7 ... Nfd7
from KIA rules by notyetagm

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