Finally an easy challenge to complete. Maybe too easy, but we shall see. If the mines were deliberately arranged in specific patterns this could get tricky, but for now we can keep testing for ways deeper into the minefield, always taking the longest known safe route. I'm kind of expecting the correct path to involve some backtracking.
Note that we should not explore new paths unless it is necessary. It was kind of pointless to try multiple start locations until we had tested all squares accessible from the first one, but since we did not hit any mines there it is fine.
!forwardright
11
Next command should be !forwardleft, 17.