Ladder escape template

A minimal edge template which can be used as a ladder escape.


 * Row-2 ladders: All of the common edge templates are valid.


 * Row-3 ladders: Templates II, IIIa, and IVa are valid.


 * Row-4 ladders: Template IIIa is valid. Also template IVa is valid if you can double bridge to the escape piece as follows.

R6 C9 Vb3 Vc3 Vd3 Sf2 Vg3 Ha4 Hb4 Hc4 Hd4

Red can jump ahead to the escape template by playing at the marked hex.