Available Interactive Tools & Practice Drills
1. Charleston Decision Assistant
URL: https://mahjonghandbook.com/tools/charleston-decision/
Function: Algorithmic 14-tile rack evaluator and 3-pass optimizer. Input your opening dealt tiles to compute compatibility scores across all 2026 NMJL card families. Protects natural pairs (since Jokers cannot replace pairs) and calculates cluster density across 3-number spreads.
2. Opponent Exposure Decoder
URL: https://mahjonghandbook.com/tools/opponent-decoder/
Function: Reverse-lookup target hands from called exposures. Select an opponent's exposed Pungs, Kongs, or Quints to immediately reveal the remaining candidate hands on the 2026 card, identifying deadly hot discards to hold.
3. Interactive Exercise Room & Bot Trainer
URL: https://mahjonghandbook.com/tools/exercise-room/
Function: Full 4-player passing simulator powered by 3 tactical AI bots. Practice the complete 6-step Charleston sequence with real-time pass efficiency feedback under zero tournament pressure.
4. Daily Charleston Passing Challenge
URL: https://mahjonghandbook.com/tools/daily-puzzle/
Function: Daily curated opening rack dilemma published every 24 hours. Rate your passing choices against optimal mathematical lines and view live community voting percentages.
5. American Mahjong Scoring & Settlement Calculator
URL: https://mahjonghandbook.com/tools/scoring-calculator/
Function: Referee-grade payout engine resolving table disputes. Calculates exact points for self-drawn doubles, discard penalties, Jokerless multipliers, and 3-exposure table liabilities.