Here are the minimal known tri-oddities for polyiamonds of order up to 6. Impossible polyiamonds are shown in black. Please write if you find a smaller solution or solve an unsolved case.
For heptiamonds (7-iamonds), see Heptiamond Tri-Oddities. For polyhexes, see Polyhex Tri-Oddities.
[ Moniamond | Diamond | Triamond | Tetriamonds | Pentiamonds | Hexiamonds | Mirror Symmetry ]
Last revised 2017-09-02.