Novoban
This collection of 50 levels is intended for beginners. The difficulty of the
levels is increasing. The collection ends with some medium levels. I submitted
these problems to my 10 and 14 year old nephews who completed all in one day
(which is not bad at all for complete beginners). However, if you are an expert,
solving the whole collection in less than 45 minutes is quite a challenge. (François Marques)
to cancel the last move