Doctor Chess

Doctor Chess brings the full FIDE rule set to your phone and tablet — castling, en passant, promotion, threefold repetition, the 50-move rule and insufficient-material draws are all enforced.

• Single player — local pass-and-play plus five AI tiers (Beginner / Intermediate / Advanced / Expert / Master) • Master tier uses iterative-deepening alpha–beta search with quiescence, null-move pruning and late-move reduction • Online 1v1 — turn-based matches via Apple Game Center, no sign-up required • Friend invites through the system Game Center picker • OS-native leaderboards and achievements • 40 languages • Tap or drag to move, automatic promotion dialog, last-move highlight, legal-move dots

No sign-up. No ads. No tracking. No in-app purchases.