WARNING FOR RIDDLE ANSWER ATTEMPT
I suppose it would have been wise to read the specifications a bit more carefully. I think I removed all the symmetric cases, although it still feels like I’m missing something. It worries me that I did not use the dummy stone.
-Scale 1———Scale 2———Aside
1,2,3,5——–6,7,8,11——–4,9,10,12,13
1,2,5,6——–3,4,9,10——–7,8,11,12,13
1,3,8,10——2,7,9,12——–4,5,6,11,13
1 LLL
2 LLR
3 LRL
4 BRB
5 LLB
6 RLB
7 RBR
8 RBL
9 BRR
10 BRL
11 RBB
12 BBR
13 BBB