Mittelsteine drehen ohne Tausch
turning middlestones without moving stones
( B' R' B R' B' R² B R² )³
(24,30)
[ R² ]
(B' R' B R' B' R² B R² · B R' B R' B' R² B · x² · B' R' B R' B' R² B
(22,26)
[ R² ]
(R U R U')
5
(20)
[ R² ]