Invasion Timing
Decide when to invade, reduce, prepare, or tenuki.
Advanced lesson. Board: 19x19. Estimated time: 11 minutes. Concepts: timing, invasion, preparation.
Reference notes
- Invade when escape routes or defects exist.
- Reduce when the opponent is too strong.
- Prepare with probes and forcing moves when direct entry is premature.
Practice prompt
Mark a deep invasion, shallow reduction, and tenuki candidate, then justify one.
Review check
Check whether the move you rejected became better after one preparatory exchange.