Not long ago I tried to remake the subject by Cyningstan (http://www.worldofspectrum.org/infoseekid.cgi?id=0028028 ), yet found a few moments which are rather nontrivial for the AGD. Except "empty" tile (which is easy), there're four types of tiles--"uncovered" [as fodder], "asteroids" [as deadly], "planet" [as custom], and "hyperhole" [ object?]--in the game 10x10 field.
The points is that "digging up" the fodder reveals its "sector type" (tile), but it should be randomly predefined and not shown BEFORE digging, unless opened.
Thus, I don't know how to mark the field layout and how to differentiate the last (fourth) tile type, let alone hiding it below fodder blocks...
So, what you think, how it would be better and more efficient in the AGD?