This is a late reply ... the bent riders that are not bent are in fact long known, problemists call them slip pieces (slip-R, slip-B, and slip-Q). The slip-R is also known under the name Panda and plays with this name in the S(w)eeping Switchers army for CwDA (2002).
This is a late reply ... the bent riders that are not bent are in fact long known, problemists call them slip pieces (slip-R, slip-B, and slip-Q). The slip-R is also known under the name Panda and plays with this name in the S(w)eeping Switchers army for CwDA (2002).