This is my version of battleships.
You have 3 axes instead of 2 which makes the game a little harder. The field of play is a little bit bigger, which is why I changed the numbers and size of the ships.
You always need a letter (f / F) and a number (6) to aim.
The letters are in lines and the numbers are in diagonals. The left diagonal of the number is the capital letter, the right diagonal is the lowercase letter.
You have several options to target a point. In the example at picture 4 and 5, you can select the left x with F6 or the right x with f6. You can also choose F10 or f2 here, marked in blue but it doesn't matter. Determine a point with two of the three possible coordinates and shoot.
On the second plate you can mark your hits and misses.
Maybe you add a coordinate grid to the plate as well.

Print instructions

I printed everything in PETG with 15% infill.

Be careful!

Multi colored version:
The gcode files marked with MC are designed for a single extruder and are multi-colored. you have to change the filament twice during the printing process.

Simplified (single colored) version:
there is another mf3 file called All-you-need.mf3
it is single colored and you can print all parts in one go without changing the filament.