Player vs bot win rates in six mahjong variants
In a bot room on Mahjongo you sit at the table with three computer opponents. In the period June 2026 – September 2026 we recorded 2,784,957 hands in bot rooms across six variants. This is who won them.
| Variant | Hands | Player won | Even share | Bots won | Draw |
|---|---|---|---|---|---|
| Riichi | 270,744 | 22.7% | 22.9% | 69.0% | 8.3% |
| Chinese Official (MCR) | 621,591 | 27.8% | 21.3% | 57.5% | 14.6% |
| Hong Kong | 845,419 | 26.5% | 23.3% | 66.9% | 6.6% |
| Taiwan | 499,132 | 23.2% | 23.4% | 70.4% | 6.4% |
| Sichuan (Bloody)* | 200,622 | 32.8% | 23.0% | 59.0% | 8.2% |
| American | 347,449 | 22.0% | 21.4% | 63.5% | 14.6% |
* Sichuan: the seat with the biggest score gain in the hand (several players can win one hand).
With four seats at the table, an evenly matched player would win a quarter of the hands that do not end in a draw. That is the "even share" column: (100% minus draws) divided by four.
Players win clearly more than an even share in Chinese Official (MCR) and Hong Kong. In Riichi, Taiwan, and American they win within one point of an even share. Draws are most common in Chinese Official (MCR), at 14.6% of hands.
Sichuan is counted differently
Sichuan on Mahjongo is played as Bloody (血流成河): the hand goes on after the first win, so several players can win in the same hand. For Sichuan, a hand counts as a player win when the player finished it with the biggest score gain. The figure is not directly comparable with the other five variants.
How these numbers are counted
- Only bot rooms are included, where one player faces three bots. Coin rooms and friend rooms are left out: they can seat several players, and "player won" there would mean any of them.
- A hand is a draw when nobody's score changes. Otherwise the winner is the seat with the largest score gain; if two seats tie, the first seat in the hand record counts.
- Hands won by bots are counted like any other hand.
The yaku and fan behind these hands are on the Riichi yaku statistics and Chinese Mahjong fan statistics pages.