ONE BRILLIANT MOMENT
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Tigran Petrosian vs Bobby Fischer · 1971 · move 23.
Which d-pawn advance reaches the sixth rank?
Petrosian’s central pawns reach c5 and d6 while Fischer’s passed e-pawn threatens promotion. White permits that promotion in the recorded line and removes the new queen with a rook. The attack continues through the exposed black king, making this a lesson in calculating the whole sequence before counting material.
Before reaching for a move, identify the opponent’s immediate threat and the piece you most want to improve. Then compare checks, captures and quiet moves. The complete interactive lesson will let you test your answer without revealing the historical continuation first.
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