Is a contested battlefield (with an enemy unit present but no controller during showdown) considered 'open' for Sneaky Deckhand's play restriction?

Ruling: An 'open battlefield' means an unoccupied battlefield with no units present at all, not simply an uncontrolled battlefield. A contested battlefield with an enemy unit is not considered open.

Nuances:

• The term 'open battlefield' lacks an official definition in current rules and is expected to be clarified in the next update
• Some interpret it as 'uncontrolled battlefield' regardless of units, but the consensus leans toward 'unoccupied'
• Control status during showdown does not make a battlefield 'open' if units are present