In Две крепости ("Two Fortresses"), both sides are trying to prevent the other side from completing their fortress.
They do this by advancing their forces to attack the walls, but at the same time they build and protect the ones they have. Income is required to build armies and improvements to the walls.
The game is played in turns. During each turn a player does the following:
receive income
raise troops
movement
combat
construction
Combat is resolved by determining the strength of the attack versus the defense value of the armies and wall. Both sides can modify this by playing a card. Finally, both roll a die and compare the scores, with the loser losing the difference between the values. Sometimes this means destruction of the wall.
The first player to construct a fortress on the border of their capital, wins the game.
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