DominionStrategy Wiki
— Land of Hinter's turn 17 — Land of Hinter plays an Inn. ... drawing 2 cards and getting +2 actions. ... discarding 2 cards. Land of Hinter plays a Treasure Map. ... trashing the Treasure Map. ... trashing a Treasure Map from hand. ... gaining 4 Golds on the deck. Land of Hinter plays a Treasure Map. ... trashing the Treasure Map. ... trashing a Treasure Map from hand. ... gaining 4 Golds on the deck. (Land of Hinter draws: 5 Golds.)
"X" never, ever marks the spot.
Then why do you need another half map which looks exactly the same if X is already on that one?