4.3 Five blocks

An agari hand is made of four melds and one pair: five groups.

Melds, taatsu, and toitsu are called blocks.

This hand has two melds, two taatsu, and one toitsu: five blocks.

Shaping your hand toward agari by drawing and discarding is called hand building. Building by splitting your hand into five blocks is called the five-block theory.

When every taatsu becomes a meld and the toitsu stays as the pair, the hand is complete.

With five blocks, tiles outside them are not used in the agari. You discard those first.

Discard one tile that is not part of the five blocks.

Discard one tile that is not part of the five blocks.

Discard one tile that is not part of the five blocks.

Discard one tile that is not part of the five blocks.

Discard one tile that is not part of the five blocks.