Chessku

Every puzzle is a grid with a hidden arrangement of chess pieces — one King and a mix of Queens, Rooks, Bishops, and Knights. Each square shows a number: the mobility of the piece on that square — how many legal moves it has, blocked by other pieces and bounded by the grid edges.

Your job: figure out which piece sits on each square using only these numbers as clues.

1. Select a piece from the palette below the board (or press K Q R B N on your keyboard).
2. Place it by tapping a square, or click-and-drag to paint multiple squares quickly.
3. Submit your guess. You'll get Wordle-style feedback on every square:

4. Correctly-placed pieces carry forward to your next guess — you only need to fix the wrong ones.
5. While composing, watch the glow on each piece: a green glow means its mobility matches the target number, red means it doesn't. Use this to fine-tune before you submit.
6. Solve it within the guess limit, or the position escapes you.

• Start with the King. It can only move one square in any direction, so high-mobility squares are never Kings.
• Knights have unique reach. Their L-shaped move means their mobility count is often distinctive — especially on small boards where many jumps go off-edge.
• Zeros are free information. A square with mobility 0 is empty in the solution — no guessing needed.
• Use the glow. Before submitting, check the green/red glow on every placed piece. If a piece glows red, its current mobility doesn't match the target — either the piece type or its neighbours are wrong.

Every mode shares the same daily seed — a new puzzle appears at midnight in your local timezone.