PlanetsCentral

Mine sweeping is exact in PHost. There is no rounding. 20.1 is greater than 20, so no sweep.

However, there's one big gotcha. In PHost, mine decay happens before mine laying. This means your minefield will be 5% smaller next turn than now. You might appear in sweep range today, but after 5% decay, you'll be out of range.

This is the reason why PHost typically is played with a WebSweepRange of 3..5, to avoid that you move into the minefield and hit a mine, and then are told you're too far to sweep.

--Stefan