Attacking Opposite-Side Castling: a middlegame course

With kings on opposite sides, pawn advances can open attacking lines. Compare both sides’ threats and timing.

5 lessons, each followed by its own puzzle drill, then 10 themed puzzle packs.

• It Is a Race — Compare the speed and strength of both attacks.
• Storm With Pawns — Advance supported pawns toward the opposing king.
• Open the File — Prepare an exchange that opens a file for your pieces.
• Do Not Touch Your Own Shelter — Check your own king’s safety before advancing its pawns.
• Win the Race With a Tempo Sacrifice — Calculate whether a sacrifice gains the time your attack needs.