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Deep Sengupta vs Tigran L Petrosian
Wch U20 (2004), Kochin, rd 2, Nov-20
Four Knights Game: General (C46)  ·  0-1



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Kibitzer's Corner
Jun-09-05  notyetagm: White resigns because he is mated by 29 ... ♗g1+! 30 ♔xg1 ♕e1+ 31 ♔g2 (31 ♔h2 ♖e2#) ♖e2+ 32 ♔f3 ♕f2# (32 ... ♖f2#, 32 ... ♕f1#). Notice the critical role played by the Black f5-pawn, which denies the White king access to the g4-square. <White probably missed this point, that his king cannot escape from the Black e-file heavy pieces via g2 and f3 because the g4-square is covered by this f5-pawn.>
Jun-09-05  notyetagm: Here White blunders with 29 ♖c1-c4??, allowing the forced mating line given above. <Moving away your defender of the backrank is almost always a tactical error.> That statement is an exaggeration but is nevertheless very close to the truth.
Jun-09-05  notyetagm: Yet another example of the <Three-Piece Rule>: you need at least 3 pieces to deliver mate, one to sacrifice (29 ... ♗g1+!), two to give mate (31 ... ♖e2+, 32 ... ♕f2#). Said in another way, <3 pieces attacking an undefended king is mate.>
Dec-21-05  notyetagm: 29 ... ♗g1+!, a lovely <decoy for tempo>.
May-27-06  SnoopDogg: Wow what a game. Junior can't find d3!! it seems. I guess this Petrosian was right when he said after the game <human intuition is stronger than computer calculation> well at least in this game.
May-28-06  Open Defence: if you didn't know this was played in 2004 you would think that this was a game from the 19th century ..... I think Steinitz would like how the ♔ went for a "walk" until d5 with no pawn cover.....
Premium Chessgames Member
  tamar: Black's intuition that plugging with 15... d3 is worth a rook is borne out by the variation:

16 Nxh8 f4 17 h3 Qe2+ 18 Qxe2+ fxe2+ 19 Kg2 f3!

click for larger view

Sealing in White's King. If 20 Kxf3 Bxh3 is immune from capture because of the e2 pawn.

Jun-22-06  PhilFeeley: This was a slug-fest from move 4! Great game - very tense and entertaining.

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