Nabo Cosmos
This set was published progressively on the site of Paul Voyer,
Gerald Holler and Frantisek Pokorny. I wanted this set more difficult
than Microcosmos, but still with small levels. And why Nabokosmos ?
Read backwards "Som(e)sokoban";-) This set contains 2 levels "3boxes",
8 levels "4boxes", 21 levels "5boxes", 7 levels "6boxes" and 2 levels
"7boxes". (Aymeric du Peloux)
to cancel the last move