Main mutator · Unlock level 9
After your 6th completed player move, up to two eligible bishops or knights change type permanently.
Rule variants
A campaign Extra variant changes the main mutator rule. It is separate from an additional side mutator.
Base variant
Main mutatorAfter your 6th completed player move, up to two eligible bishops or knights change type permanently.
After you complete your 6th move, the mutator chooses either bishops or knights on the chosen side and changes up to two of those pieces into the other type. The changed pieces keep their new type for the rest of the match and can move, capture, and be captured normally.
Extra variant
Changed main ruleAfter your 6th completed player move, two eligible bishops or knights become ordinary pawns permanently.
After you complete move 6, two eligible bishops or two eligible knights on the chosen side become ordinary pawns. They move, capture, and can be captured as pawns, but they do not receive a first-move two-square advance.
Affected side: Your side
After your 6th completed player move, up to two of your bishops or knights change type permanently.
Affected side: Enemy side
After your 6th completed player move, up to two enemy bishops or knights change type permanently.
Strategy notes