Closed walk
A piece returns to a previously occupied square. Special cases of the closed walk are areal cycle, linear cycle, and switchback.
See also: Areal cycle; Linear cycle; Switchback.
Caillaud, Michel
feenschach, 1987
1st Prize
h#9 (9+8)
1.a5
Bd2
2.a4
Bc1
3.a3
Bb2
4.a2
Ba3
5.a1=R+
Bc1
6.Ra2
Kg1
7.Rxf2
Bd2
8.Kg3
Be1
9.h3
Bxf2#