Chapter 2: Tile Efficiency and Tile Theory

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Playing by Tile Theory What does tile efficiency really mean as a way of thinking? Its essence lies in repeatedly listing your discard candidates and comparing them.
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Effective Tiles and Tile Count Confirm one of mahjong’s most basic principles: the more tiles that help your hand, the better.
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The Theory of Floating Tiles Depending on how you hold your tiles, their functions can overlap. Unnecessary tiles should be discarded.
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Taatsu Theory (1) This page compares the functions of taatsu from the viewpoints of acceptance count and the chance to improve into better shapes.
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Taatsu Theory (2) Centered on how to think about ryan-kan shapes, this page checks the main ryan-kan variations.
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Taatsu Theory (3) A look at composite taatsu that appear frequently in actual play and how to handle them.
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How to Think About Discard Choices How should you practice tile efficiency? How do strong players think differently? This page touches the core of tile theory.
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Early-Hand Tile Theory (1) How should you advance your hand at the initial deal, or in the early turns?
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Early-Hand Tile Theory (2) A look at cases where you have many taatsu but still cannot clearly imagine the final completed hand.
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Tile Theory at Two-Shanten (1) Learn the tile efficiency of hands that are at two-shanten and getting closer to completion.
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Tile Theory at Two-Shanten (2) Continuing from the previous page. Keep the perspective of cutting the least functional taatsu first.
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Tile Theory at Two-Shanten (3) Check exceptional hand patterns such as hands that may turn into Chiitoitsu or hands without a pair.
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Tile Theory at One-Shanten (1) Tile theory at one-shanten has a major effect on your winning rate. It is one of the most important skills in hand-building.
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Tile Theory at One-Shanten (2) Tile efficiency at one-shanten. It is worth memorizing the shapes that appear again and again as fixed patterns.
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Tile Theory at One-Shanten (3) Build the habit of comparing which choice actually brings you closer to winning.
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Tile Theory at One-Shanten (4) Continuing the study of one-shanten tile theory, with attention to headless shapes.
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Tile Theory at One-Shanten (5) Continuing from the previous page, this one keeps examining headless shapes.
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Tile Theory at One-Shanten (6) This page covers kuttsuki one-shanten. One-shanten tile theory is so important that it takes many pages.
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Tile Theory in Tenpai In tenpai there are often not many choices, but it is still worth looking at concrete examples.
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Shanten Reversal Sometimes, even though it moves you farther from winning in the short term, there are cases where stepping back in shanten is correct.
Original Japanese page: http://beginners.biz/pairi/