Double Check: a theory course

Double check attacks the king with two pieces at once. The king must move unless it is checkmate.

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

• The Forced King Move — Recognize why blocking or capturing one checker is not enough.
• Force the King — Use double check to force a king move.
• Set Up Double Check — Prepare two checking lines.
• Double Check to Mate — Use double check when every king escape is covered.