A grid-based logic puzzle
Color each cell black or white… and give your brain a workout.
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Group size
If a cell contains a number, it must be part of a group of orthogonally connected cells of the same color and that group's size must match the number.
A group of 1 cells must be bordered by cells of the other color.
This group must contain 2 cells so it cannot be white, that would make a group of 6 cells already.
Then the group must grow to its size and be bordered.
This group must contain 5 cells so it cannot be white, that would make a group of 6 cells already.
Then the group must grow to its size and be bordered.
We're left with a group of 10 white cells to create and we must use all the remaining cells for that.
