In “Matches” after “Each Puzzler has a publicly tracked number of Matches, defaulting to 0.” add “Each Puzzler also has a publicly tracked numerical Multi Match Bonus, which also defaults to 0.

In the “Collect Match” atomic action after the step “Select one Group of Cells that is considered a Match” add

- If any of the cells in the currently selected group are part of a Match with another cell that is not in the currently selected group, also select the cells in that Match

and after the step “Add 1 to that Puzzler’s Matches” add

- Increase that Puzzler’s Multi Match Bonus by (X-3) * (X- 2) / 2, where X is the total number of different cells that were selected during this specific instance of the atomic action