Openings and endgames
Queen's Indian and Bogo-Indian
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Queen's Indian Defense
A defense to d4 in which Black prepares ...Bb7 with ...b6 and controls the center with pieces rather than occupying it immediately.
Queen's Indian Defense, Fianchetto Variation
A White system that prepares the bishop on g2 to control a long diagonal, support the center, and help secure the king.
Queen's Indian Defense, Classical Variation
A line in which both sides develop a bishop on a long diagonal before deciding how to occupy or challenge the center.
Queen's Indian Defense, Petrosian Variation
A White system that advances the a2-pawn to a3, preventing Black’s bishop from reaching b4 and preparing the knight on c3.
Queen's Indian Defense, Kasparov Variation
A line where White immediately develops the b1-knight to c3 and allows Black’s bishop to move to b4.
Queen's Indian Defense, Spassky System
A flexible system that advances the e2-pawn to e3, frees the f1-bishop, and helps White secure the king quickly.
Bogo-Indian Defense
A defense to d4 in which Black develops the bishop to b4 with check after White's king knight has moved to f3.
Bogo-Indian Defense, Nimzowitsch Variation
A Bogo-Indian line in which White blocks the check with Bd2 and Black supports the bishop with ...Qe7.
Bogo-Indian Defense, Retreat Variation
A Bogo-Indian branch in which Black gives a bishop check and, after White blocks it, retreats without exchanging.