Hold a tile in your hands

Turn it over

The fold-up tile

One sheet of A4 holds the tile and its back, joined along one straight edge. The front carries the knot; the back says what the tile is, who found the spectre, and what the knot does.

1. Print the page at actual size (one tile edge is 41 mm).
2. Cut round the outer black line, as one piece.
3. Fold along the dashed line, printed sides out.
4. Glue the halves back to back.

Lay a patch

Spectres fit together without flipping, in patterns that never repeat. Put a few edge to edge and follow a ribbon across the joins. With nine tiles in the right arrangement, as here, you can already see pieces joining into longer strands.

The arrangement is the 9-tile supertile from the spectre paper. On the See page you can watch the same block join up.