If it is not stipulated that all three parties, Party A, Party B and Party C, will share the money with me, the absolute value of winning or losing for those four people will be the same. But if you make such rules, it's different.

In fact, it is clear that before the winner of the other three wins with you, if all three of them win and only one of you loses, then you must lose! Only half of them came back, but the three of them still won, but the money they won was halved; If only one of them loses with you, and you only lose half of the money they won, then you just don't lose or win; If two of them lose with you and you lose less, then you make a small profit, the other winner earns the most, and the other two lose.

In short, you must not lose more than half of the total money won by the winner, so as to ensure that you don't lose.

Only if you win, you can win the most, and if you win three, you can earn the most. But can you do it?

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After reading your supplement, I can't imagine you playing mahjong like that.