Man pages matching name sgt-cube in section 6:

sgt-cube.6.de	debian 10 / sgt-puzzles
sgt-cube.6.en	debian 10 / sgt-puzzles
sgt-cube.6.de	debian 11 / sgt-puzzles
sgt-cube.6.en	debian 11 / sgt-puzzles
sgt-cube.6.de	debian 12 / sgt-puzzles
sgt-cube.6.en	debian 12 / sgt-puzzles