Castling

1level 0slides 0astray 0best

How to play

CastlingSlide the army home

Fifteen pieces and one empty square in a frame of sixteen. The pieces have been shuffled by sliding; slide them back. Home is the army's own setup read like a board: rook, knight, bishop, queen along the top, the empty square where the king stands, then the rest of the back rank and the pawns below. Nothing lifts off the board, so every shuffle can be undone.

RulesWhat counts, what ends it

A tap on a piece in the empty square's row or column slides it, and every piece between, one square toward the gap. That is one slide however many pieces moved.
Astray counts the pieces off their squares; a pawn on any pawn's square is home.
The shuffle doubles every level, from eight slides to a full shuffle by level seven.

ControlsKeys, taps and the address

Tap: slide toward the gap
Arrows: slide the piece beside the gap that way
R: reshuffle the level
?daily: the same shuffle for everyone today