Alpha (West) to play
Alpha (West) will win in 2 turns.
Beta's homeworld is already half-destroyed. Alpha only needs one more red ship to prepare the second phase of a Doomsday machine.
Alpha must ignore the other two build actions available on their first turn. Adding ships anywhere would make them vulnerable to an overpopulation that would spoil the plan.
The pictured position is a slightly modified version of this game I played with "Tilt" on Board Game Arena.