Breakthrough is a clever abstract game invented by Dan Troyka in 2000. In Breakthrough, two uniform armies confront each other on a checkerboard and start a merciless
battle, capturing enemies and advancing ranks as the game progresses. Retreating is not
even an option in this game, and the final victory will be for the first player who breaks
through the enemy defenses.

The game's story is here https://trmph.com/bin/Basic_Introduction_to_Breakthrough.pdf

Enjoy…