Man pages matching name xskewb in section 6:

xskewb.6.en	debian 10 / xmpuzzles
xskewb.6.en	debian 10 / xpuzzles
xskewb.6.en	debian 11 / xmpuzzles
xskewb.6.en	debian 11 / xpuzzles
xskewb.6.en	debian 12 / xmpuzzles
xskewb.6.en	debian 12 / xpuzzles