**Syntax**:(range integer)

XaoS has a solid guessing optimization: if all corners of a rectangle have the same color, it assumes that the whole rectangle is a solid colored block, and doesn't calculate points inside the rectangle. This optimization saves lots of calculation, but sometimes introduces errors. This value alters the maximum size of the rectangle that can be guessed at one time. The default value is 3; use 0 to disable the optimization.

**Available as**: command line option, command