Rule:ThinSolver4

@RULE ThinSolver4

https://conwaylife.com/forums/viewtopic.php?p=57179#p57205

0 vacuum 1 wall 2 fill 3 goal @TREE

num_states=4 num_neighbors=4 num_nodes=28 1 0 1 2 3 1 2 1 2 3 1 0 1 3 0 2 0 0 1 2 1 3 1 3 3 2 1 1 0 4 2 2 2 4 0 3 3 3 5 6 2 0 0 0 4 2 4 4 4 0 3 5 5 8 9 2 0 0 0 0 3 6 6 9 11 4 7 7 10 12 1 0 1 3 3 2 0 0 0 14 2 1 0 0 4 2 2 14 4 0 3 3 15 16 17 3 5 16 8 9 3 6 17 9 11 4 7 18 19 20 3 8 8 8 9 3 9 9 9 11 4 10 19 22 23 3 11 11 11 11 4 12 20 23 25 5 13 21 24 26

@TABLE n_states:4 neighborhood:vonNeumann symmetries:permute var a = {0,1} var b = a var f = {0,1,2} var g = f var h = g

1. draw path

0,2,0,a,b,2

1. retrace good path

0,2,3,f,g,3 2,3,f,g,h,3

1. untrace bad path

3,0,3,a,b,0

@COLORS 1 130 130 130 2 140 000 140 3 000 220 000