Players collapse the board by capturing everything outside the group that contains the piece they just moved. The player who makes the last move loses.

Inventor: Steven Meyers

See World of Abstract Games: Forms.

Default size.

Larger even boards (size-10 … size-18).

Capture-only, half-board setup (original).

• Current engine version: 20260610 (2026-06-10). On Abstract Play since 2026-06-22.

• Advanced Forms is the default. Original Forms is a selectable ruleset.

• https://boardgamegeek.com/boardgame/36917/forms
• https://jpneto.github.io/world_abstract_games/forms.htm