Eight small studies in overlap

Oddprint

Move a mask. Clear a pair. Keep a little print.

Your paper tap an anchor square

Target

Dark squares need ink.
Light squares need paper.

1 / 3 marks = ink0 / 2 marks = paper+ missing ink− extra ink

Masks

Choose A, B or C; then click the top-left square of its box.

Your eight cards

Kept prints stay here when you revise a draft. Every card is available.

A blank album

Ink appears in odd places.

Each mask marks the little squares shown in its shape. On this paper, one mark makes ink, two clear each other, and three make ink again. Empty parts of a mask do nothing.

Select a mask, quarter-turn it if needed, then click a square to place the top-left corner of its bounding box. The whole mask must fit on the 4×4 paper. The little A/B/C labels show which masks cover each square.

Use every mask and match the target exactly, then Keep this print. There are eight authored cards and a final album ending. No timer, scoring penalty, or progress while away. Undo and restart are free; restart can also be undone. There is no audio.

Keyboard: 1/2/3 select masks; Q/E turn; L lifts; U undoes; R restarts; K keeps. On the paper, arrows move focus and Enter/Space places the selected mask. Tab reaches every control. Shortcuts pause in dialogs and form fields.