These problems are based on constructions made from the set of 16 convex pieces we get if we add two squares to a 2x3 rectangle.

Alternatively, we can use the set of convex pieces obtained by adding two parallel dominoes to a 2x2 square.

These problems are based on constructions made with a single polyomino.

Here we use the set of forty octominoes formed by adding two dominoes to a 2x2 square.