A riichi mahjong defense simulator that helps you find against a preemptive .This site does not grade push-or-fold judgment. Practice rule-based defense built to never deal in.
Controls
Click any tile to discard it.Click a part of the report to see the review for that .
Flow
Defense starts when an opponent calls .Opponents play their best discards. They may chase with a .Survive the hand without a .
A tile a given player has discarded, or has passed up for . keeps it from becoming a . Perfectly safe. Against two players, it must be genbutsu to both.
Honor
Seen
→
Winds and dragons. No is possible, only and , so the more copies seen, the safer it is. With three copies seen, is gone and only remains.
Kabe
Kabe
→
All four copies of a tile are visible, so every using that tile is gone. Relatively safe. Count your hand, the discards, and the together.
Suji
Safe
→
Suji
A tile three away from a (4-6 only). keeps it from a on a . Relatively safe. It does not cover , , , or .
Play
Winning
Waits
Defense
Turn
One go around the table, starting from the .
Oya
The seat that scores 1.5x and keeps the deal on an .
Ko
The three seats that are not the .
Dora
Dora indicator
→
Dora
Bonus tiles that raise the score of an . The dora is the tile after the dora indicator.
Draw
The wall runs out with nobody reaching an .
Agari
+
Wait
Completing the hand for points, either by or by .
Tenpai
+
Wait
One tile away from an . of zero.
Shanten
3-shanten
2-shanten
1-shanten
How many more you need to reach . Lower is closer.
Ukeire
+
Ukeire
The tiles that lower , counted by kind and copies.
Riichi
Declared
A yaku declared at . The hand is locked afterwards.
Tsumo
+
Tsumo
An on a tile you drew yourself.
Ron
+
Ron
An on a tile someone else discarded.
Deal-in
+
Deal-in
Your discard gives an opponent their .
Furiten
→
Furiten
If a tile you discarded is a , is not allowed. On a , if you already discarded 2p, is blocked on both 2p and 5p.
Wait
→
Wait
The tiles that turn a hand into an .
Ryanmen
+
Wait
A 3-4 shape waiting on from both sides. The widest .
Kanchan
+
Wait
A 3-5 shape waiting on the tile in between.
Penchan
+
Wait
A 1-2 shape waiting on one end only.
Tanki
+
Wait
A single tile waiting to become the pair.
Shanpon
+
Wait
Two pairs waiting for either one to become a triplet. One turns into the triplet, the other stays as the pair.
Safe tile
A tile that cannot cause a . is the safest, followed by , , and .
Genbutsu
Discard
→
Safe
A tile a given player has discarded, or has passed up for . keeps it from becoming a . Perfectly safe. Against two players, it must be genbutsu to both.
Suji
Safe
→
Suji
A tile three away from a (4-6 only). keeps it from a on a . Relatively safe. It does not cover , , , or .
Naka-suji
Safe
→
Naka-suji
A 4, 5, or 6 whose on both sides are . Every using it is gone.
Kata-suji
Safe
→
Kata-suji
Only one side of the is . The other side of the is still live, so it is riskier than .
Kabe
Kabe
→
All four copies of a tile are visible, so every using that tile is gone. Relatively safe. Count your hand, the discards, and the together.
Honor
Seen
→
Winds and dragons. No is possible, only and , so the more copies seen, the safer it is. With three copies seen, is gone and only remains.
Dangerous tile
A tile covered by none of , , or . Tiles around the declaration tile are especially dangerous.