10x10 Quaternary Symmetrically Closed Knight Tours 

10x10a Knight's Tour

10x10a-red Knight's Tour

10x10b Knight's Tour

10x10b-red Knight's Tour

10x10c Knight's Tour

10x10c-red Knight's Tour

10x10d Knight's Tour

10x10d-red Knight's Tour

10x10e Knight's Tour

10x10e-red Knight's Tour

10x10f Knight's Tour

10x10f-red Knight's Tour