28.08.2020, 17:17

This post is a little hint for a 12x12 Classic Star Battle I created.

A classic technique in Star Battle is a tiling with 2x2 squares. By doing so and merging some of the areas together, we get the following image:

Now, we can transfer the situation onto a 6x6 grid:

Please note that each cell in the 6x6 grid above corresponds to a 2x2 square in the original Star Battle and each of the areas in the 6x6 grid consists of two areas in the 12x12 grid. Hence, every area, every row and every column in the 6x6 grid above has to contain exactly four stars (which may touch each other, as they correspond to 2x2 squares in the 12x12 grid). With this perspective it is easier to locate stars. Since every cell in the 6x6 grid corresponds to a 2x2 square in the original 12x12 grid, we therefore know which 2x2 squares in the original Star Battle have to contain a star.

A classic technique in Star Battle is a tiling with 2x2 squares. By doing so and merging some of the areas together, we get the following image:

Now, we can transfer the situation onto a 6x6 grid:

Please note that each cell in the 6x6 grid above corresponds to a 2x2 square in the original Star Battle and each of the areas in the 6x6 grid consists of two areas in the 12x12 grid. Hence, every area, every row and every column in the 6x6 grid above has to contain exactly four stars (which may touch each other, as they correspond to 2x2 squares in the 12x12 grid). With this perspective it is easier to locate stars. Since every cell in the 6x6 grid corresponds to a 2x2 square in the original 12x12 grid, we therefore know which 2x2 squares in the original Star Battle have to contain a star.