Stuck? Audit your X's

By the Queenwise team · Updated October 9, 2026

An X can record a proved deduction or a tentative thought. Queendom's hint engine does not accept arbitrary player marks as proof. It uses the crowns and the eliminations derived by applied hints, so an incorrect note cannot silently justify another hint.

• If a region, row or column appears to have no candidate, revisit the most recent crown and manual marks.
• State a reason for each doubtful X: a shared row, column or region, a touching crown, or a proved line/set lock.
• Undo a doubtful move and watch whether a candidate returns. Dragged marks undo as one stroke.
• Read the hint's highlighted cells and explanation. If a note hides a forced crown, the hint warns about it.

A fallback message means the engine did not find one of its supported deductions from the current position. It is not proof that your board requires guessing. Recheck crowns first, then request a hint on a recovered position.

A quick recovery routine

• Stop placing crowns. Count candidates in every unfinished region, row and column.
• Any line or region with zero candidates means an error: undo to the last move you can justify.
• Any line or region with one candidate is a forced move you missed.
• If everything has two or more, look for line locks and pairs of regions sharing two rows.

Why notes go wrong

Most stuck positions come from an X placed on a hunch, or a crown placed because it looked likely. The board still looks consistent, but one region silently lost its only real candidate. Auditing marks with a reason for each one finds these errors far faster than restarting.

Try it on a practice puzzle