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Mahjong Hand Calculator

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Mahjong, a game rich in history and strategy, involves not just skill and luck but also an understanding of how scores are calculated. Enter the Mahjong hand calculator, a tool designed to simplify the complex process of scoring a Mahjong hand, especially in the Chinese Mahjong variant. This calculator takes into account the various elements that make up a hand's score, providing players with an easy way to understand their game better.

Purpose and Functionality

The Mahjong hand calculator is tailored to compute scores based on the traditional Chinese Mahjong scoring system. It considers:

  • Basic Points: Given for the hand's structure, including sets like Pongs, Kongs, Chows, and the essential Pair.
  • Winning Tile: Extra points for winning by self-draw or claiming a discard.
  • Patterns and Bonuses: Points for special hand patterns and bonuses like Flowers and Seasons.
  • Doubles: Score multipliers for specific achievements within the hand.

The calculator simplifies these calculations, automating the process to give players immediate insights into their hand's value.


Calculating the score of a Mahjong hand can be complex due to the various scoring systems and rules across different versions of the game. However, I can provide a simplified approach to understand the basic concept:

  1. Identify Completed Sets: A standard Mahjong hand typically consists of 14 tiles. Check your hand for completed sets. These can be "Pungs" (three identical tiles), "Kongs" (four identical tiles), "Chows" (a run of three consecutive tiles of the same suit), and a pair. A winning hand usually needs 4 sets and a pair.
  2. Determine Hand Type: Some Mahjong versions score based on specific hand types or patterns, such as all tiles from one suit, a hand composed entirely of honors tiles (winds and dragons), or a hand made up of entirely concealed (self-drawn) sets.
  3. Calculate Base Points: Assign points for each completed set based on its type and whether it's concealed (self-drawn) or exposed (melded from a discard). For example, a concealed Pung might be worth more points than an exposed Pung.
  4. Add Bonus Points: Add points for special achievements, like owning a pair of season or flower tiles, having a hand that matches the prevailing wind or your seat wind, or completing a rare pattern.
  5. Apply Multipliers: Some hands may have multipliers, known as "Doubles", which are applied for specific features, such as a hand made up entirely of green tiles. The number of Doubles can exponentially increase the score.
  6. Total Score: Add up all the base points, bonus points, and then apply any multipliers to get the total score of your hand.

Formula in simple words: Total Score = (Base Points from Sets + Bonus Points) × Multipliers

Working with the Calculator: Step-by-Step Examples

Let's break down a couple of examples to see the calculator in action:

  1. Example 1: A hand with a self-drawn winning tile, a Pong of dragons, and one Flower tile.
    • Basic Points: 2 (for the hand composition)
    • Doubles: 2 (for the Pong of dragons)
    • Bonus Points: 1 (for the Flower tile)
    • Score Calculation: (2+1)×22=12(2+1)×22=12 points
  2. Example 2: A hand won by discard, featuring two Chows, a Pong of winds, and no bonus tiles.
    • Basic Points: 2 (for the hand composition)
    • Doubles: 1 (for the Pong of winds, assuming it's the player's seat or prevailing wind)
    • Bonus Points: 0 (no bonus tiles)
    • Score Calculation: (2+0)×21=4(2+0)×21=4 points

Relevant Information Table

Here's a simplified table to help understand the components of the score:

ComponentDescriptionPoints or Multiplier
Basic PointsFrom hand's structure (Pongs, Kongs, Chows, Pair)Varied
Winning TileExtra for self-draw or claiming a discard+1 or more
Patterns/BonusesFor special hand patterns or tiles like FlowersVaried
DoublesMultipliers for specific achievements2Doubles2Doubles


The Mahjong hand calculator demystifies the scoring process in Chinese Mahjong, making it accessible to both beginners and seasoned players. It not only enhances understanding and appreciation of the game's depth but also aids in strategic decision-making. By automating the complex calculations, players can focus more on the game strategy and less on keeping track of scores, elevating their overall Mahjong experience.

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