Alberi Plus

Introducing Alberi: eventually the best puzzle game of 2010 made its way to Android.
This original puzzle game, designed by the Italian Giorgio Dendi, quickly has become the most loved game amongst the readers of Italians easily most popular logic publication: "Focus Brain Trainer".
The games mechanics are loosely based on the classic logic puzzle of the 8 queens but, despite its simplicity, the game is definitely very (we mean really, really very) challenging: hours of brain-melting puzzles awaits you.
There are only 4 very simple rules but its gonna be hellish to fully abide all of em:
Every zone must have a tree.
Every row must have a tree.
Every column must have a tree.
Two trees cannot occupy adjacent tyles (even not diagonally adjacent).

Morevoer the game features super advanced levels: the fun is doubled with two trees per zone/row/column!