The AI plays itself on every combination of the values below. Rule sets are ranked from most to least balanced. Separate values with commas.
The bar shows X’s share of wins in blue and O’s in red. The pale band is the margin of error; if it covers the center line, the rules are even as far as this test can tell.
If results change a lot between AI strengths, balance depends on how well people play, not just on the rules. Comebacks are games won by whoever was behind on gems at halfway; a low number means the early leader usually runs away with it.