01PLAY HOLD’EM
Two hole cards, five community cards, no-limit betting. Make the best five-card result from any five of your seven cards.
02READ THE MODE
HIGH uses normal poker rankings. LOW uses deuce-to-seven lowball: the lowest five-card score wins.
03LOW MEANS LOW
Aces are always high. Best to worst: unpaired, pair, two pair, trips, straight, flush, full house, quads, straight flush. Lower ranks win within a category. The nuts is 7-5-4-3-2 with mixed suits.
04VERIFY THE FLIP
The server publishes SHA-256(seed) before a hand. At deal, it reveals the seed. SHA-256(seed:room:hand) decides the mode: an even first byte is HIGH; odd is LOW.
The commitment prevents the server from changing that hand’s seed after publishing it. Side pots and exact ties are split using standard chip rules.