In the Game Courier Preset I don't find this checkbox and what happens if the checkbox is not ticked?
Then all moves would be rejected, because Game Courier would have already performed those before the rule checking code is activated, so that the piece would already be gone, and moving empty squares is illegal.
But the button should be the rightmost of the three in the 'Advanced' section, when you hit 'Edit' after loading the preset:
Then all moves would be rejected, because Game Courier would have already performed those before the rule checking code is activated, so that the piece would already be gone, and moving empty squares is illegal.
But the button should be the rightmost of the three in the 'Advanced' section, when you hit 'Edit' after loading the preset: