The move preview (EvaluatePlay) validated under standard rules — it called
ValidatePlay without the game's play options — so under the single-word
rule it rejected a play whose only flaw was incidental invalid perpendicular
cross-words, even though SubmitPlay accepts it. The UI gates the submit
button on the preview, so such a play (e.g. КРАН bridging an existing Р on
the test contour) could not be made.
Pass g.playOpts() via ValidatePlayOpts, mirroring Play, so the preview's
legality and score match submission. Robots are unaffected — they search
via GenerateMovesOpts and submit via Play, both already opts-aware — and a
regression test asserts that too.
Ilia Denisov