When a dragged jigsaw piece should click into place and when it should not

Snap too eagerly and pieces jump into wrong spots on small screens; too strictly and the right spot never catches on a thumb. This entry shows how big the catch zone should be, why it must depend on the piece, and how to treat pieces that are already placed.

Why this works

A snap is a promise that a piece belongs here. So it may only work for the piece's own spot, close enough to feel right on this screen and never so close to a neighbour that two spots could claim the same piece.

When not to use it

For a hard puzzle, where finding the right place is the whole challenge, snapping near a spot is a hint in itself. Reduce the reach, or snap only when the piece is nearly exact, so help does not do the work for the player.

In the full entry

• What to build, step by step
• Starting values and the reason for each
• 4 common mistakes and the fix
• A diagram of every state
• 38 lines of example code with 4 checks that pass
• How your AI shows you that it works

Say this to your AI

Use the Spielerando entry "When a dragged jigsaw piece should click into place and when it should not" (read_entry jigsaw-piece-snap-tolerance) in my game. Build it step by step, and show me how you checked that it works.

Or skip this and connect the MCP: your AI then finds all of this by itself.Connect the MCP