Dora variations

The use of dora may be subject to variation.

Akadora

Template:Rulevar Use some red fives in place of normal fives as extra dora.

• Ari – Use three red fives, one per suit.
• Nashi – Don't use any red fives.
• Option – Tenhou.net offers both rules in different games. Akadora ari may be played with kuitan ari.
• Additional - Along with the red fives, other tiles among the numbered suits or even the honor tiles may be indicated as dora.

Kandora

Template:Rulevar After declaring a kantsu, another dora indicator is flipped in the dead wall. All four players can benefit from this.

• Sokun. – Sokunori. After declaring any type of kantsu, flip the next dora indicator immediately.
• Late – Timing on the kandora is dependent.

• After declaring ankan (concealed kantsu), flip the next dora indicator immediately.
• After declaring a minkan (open kantsu per call on a discard or per extension of a minkou), flip the next dora indicator only after declaring tsumo, declaring another kan, or discarding.
• If chankan occurs, no kandora is revealed.

• Nashi – Kandora is not used.

Kanuradora

Template:Rulevar Winning riichi declarers may flip the tile underneath each kan dora indicator and treat that as another dora indicator.

• Ari – The kanuradora is used.
• Nashi – The kanuradora is not used.

Uradora

Template:Rulevar Winning riichi declarers may flip the tile underneath the first dora indicator and treat that as another dora indicator.

• Ari – Flip the ura dora indicator.
• Nashi – Not used. Riichi declarers will know in advance how much their hand is worth.