This isn't gambling. You're renting real mining time. Your rack of gem tiles is the work your rented rig does while you play — a skill+draw game (read the ends, hold the right gems, empty your rack or hold the lowest count). Longer sessions = more rented time = more chances a rig lands a verified Block Found mid-session.
The set. 28 gem tiles, each a pair of gem counts 0–6. You get 7 (heads-up) or 5 (3–4 miners); the rest form the Unmined Pile.
Open. Whoever holds the highest matching pair (double) lays it first — that starts the seam, a line with two open ends.
Play. On your turn, extend either open end with a tile whose gem count matches that end. Can't match? In Draw mode you pull from the Unmined Pile until you can (or it runs dry, then you pass); in Block mode you simply pass.
Sealing. Empty your rack first and you seal the seam — instant win. If everyone passes and the board is blocked, the miner with the lowest remaining gem count wins.
Score. The winner banks the total gems left in every rival's rack. First miner to 100 wins the dig.
Mining frame. Credits = rented mining time (not a wager). A rare Block Found is a verified mining event with real value — it can land on any hand's decisive moment; skill just keeps you at the seam longer.