Previous heuristic returned true whenever stock or waste held any
cards. Quat hit a state with 4 cards remaining and the stock kept
cycling but nothing was ever playable — the existing detection
counted "draw is available" as a legal move and the game just sat
there.
Replace the early return with a single pass over every card that
could ever be a move source: every Stock card, every Waste card, and
the face-up top of every Tableau column. For each, check whether it
can currently land on any Foundation or Tableau. Return true only if
*some* card anywhere can land *somewhere* — otherwise the player is
genuinely stuck no matter how many times they recycle the deck.
Tightened the existing fresh-game test name to reflect what it
actually proves (a fresh deal has playable moves, not "stock is
non-empty"). Added one new test reproducing Quat's exact case.
Reported by Quat.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
funman300
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