If one of these cards is in front of a player, he may not play any path cards—of course he may still play other cards! At any time, only one card of each type can be in front of a given player. A player can only add a path card to the maze if there is no such card in front of him at the beginning of his turn.
These cards are used to repair broken tools—in other words to remove one of the broken tool cards from in front of a player. They can be played on oneself or on another player. Either way, both the repair card and the broken tool card are placed in the discard pile.
Of course, the repair card must match the type of broken tool. For example, if there is a broken mine cart in front of a player, it can only be repaired by an unbroken cart, not by a lantern or pick card.
2 Tools: Some repair cards show 2 tools. If one of these cards is played, it can be used to repair either one of the tools shown, not both.
Important: All repair cards can only be played if the matching broken tool card already lies in front of the player.