Staircase polyomino

A staircase is a polyomino that is diagonally directed from two opposite corners, creating an ascending or descending staircase shape. These are by definition forks.

Symbol

Dir42t\textrm{Dir}_{4}^{2\textrm{t}}

Regex

ru(ru)*ld(ld)*

Symmetries

State Diagram

ruld

Polyomino list

ru2ld2
4
5
6
7
8
ru3ld2
5
6
7
8
ru3ld3
6
7
8
ru4ld2
8
ru4ld3
7
8
ru4ld4
8