Fifteen

How to play

• Click a tile in the same row or column as the gap. Every tile between it and the gap slides one step towards the gap, and that counts as one move.
• Clicks on tiles that share neither the gap's row nor its column, and clicks on the gap itself, do nothing.
• The tray is solved when the tiles read 1 to 15 in order with the gap in the bottom-right corner.
• Every deal is a fresh scramble of the solved tray, so it can always be solved.

Scoring

• Moves counts your slides on this tray. Fewer is better.
• Best is your fewest moves for a solve. It is recorded the moment the tray is solved.
• A solve scores ten points for every step the tiles started from home, added up over all fifteen tiles. Moves past that cost a share of the points.
• The leaderboard ranks your last 10 rounds added up, so a steady run beats one lucky deal.

Controls

Click a tile   slide it, and the tiles between it and the gap, one step
Shuffle        deal a new scramble
Exit           leave the game