Square Enneiomino Compatibility

Introduction

The square enneiomino is a polyomino made of nine squares joined to form a 3×3 square.

The compatibility problem is to find a figure that can be tiled with each of a set of polyforms. Here I show minimal known compatibility figures for the square enneiomino with other polyominoes. If you find a smaller solution or solve an unsolved case, please let me know.

Joseph DiVincentis found the two solutions with green squares.