War

• Deal: one card to you, one to the house, each a fresh draw from 52 by the round's hash.
• The higher rank wins; ace is low, king is high, suits do not matter.
• A win pays 1.90x, a tie in rank pays 1.08x, a lower card loses the stake.
• Six ranks in thirteen win and one ties, so every deal returns 96%.

Designed return to player: 96% exact: 1.90x on the higher card, 1.08x on a tie

Every round is settled by the server from a committed seed and can be recomputed; see Provably fair below.