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STAGE 2 BANKROLL MATRIX · GRAND MARTINGALE · 300U / 3-SHOE
Grand Martingale (2x+1) — 300-Unit Bankroll & 3-Shoe (216-Hand) Risk-of-Ruin Matrix
Case M147-0 computes the eight-deck Grand Martingale (2x+1) (1-3-7-15-31-63-127) across a 300-unit bankroll and a 216-hand (3-shoe) window, where a 60-unit table ceiling and 150-unit stop-loss produce a 19.79% ruin rate while documents an average stake stake-velocity of 6.13x and 23.53u ($1177) in theoretical house-edge toll. Every 8-deck hand remains statistically independent (45.86% Banker, 44.62% Player, 9.52% Tie), meaning progression sizing reshapes session variance without altering the house edge.
- Ruin Rate (-150u Stop)
- 19.79%
- Target Hit (+75u Cap)
- 40.54%
- 216-Hand Expected Hold
- 23.53u
- Table Max (6-Step Depth)
- 60u