One of my favorite nutcrackers is Munchausen. The Lord of Lies has today a special nut to crack:
Color the cells of the grid red (the number in the cell is lying) or green (the number in the cell is telling the truth). A number in a green cell says from how many green numbers it is surrounded (horizontally, vertically or diagonally). A number in a red cell does not indicate by how many green numbers it is surrounded horizontally, vertically and diagonally. In no 2x2 square can only be red cells.