Two Weaknesses — the Principle of Two Fronts: a middlegame course

One weakness may be defended. Create another target, then compare how quickly each side can switch its pieces.

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

• The First Weakness — Restrict the first target and make it require defense.
• Open a Second Front — Create a second target on another part of the board.
• Stretch the Defence — Build pressure on both targets.
• Attack the Second Weakness — Switch the attack when the defenders cannot follow in time.
• Use the Weakened Defense — Calculate the capture or exchange that uses the exposed target.