The rock rules are terrible, I would even say pathological. They are:
* The rock is worth twice the big blind
* 7️⃣ The player with the rock must post it as a straddle immediately regardless of position
* Action preflop always starts UTG 7️⃣ unless the rock is UTG in which case it starts +1
* If a player in the blinds has the rock, 7️⃣ it replaces their normal blind
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