Restart after the first encounter for maps 115-116-117 inclusive, depending on whether it's a fast, medium, or slow road respectively.
An encounter is considered to be direct contact between players, i.e., any battle between them (a battle between any heroes, a battle with an enemy castle garrison, or mine).
If an encounter occurs within the specified time frame, either opponent can request a restart. If both players agree to continue the game, the game continues. Subsequent encounters occurring within the specified time frames do not constitute grounds for a restart.