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STAGE 2 BANKROLL MATRIX · GRAND MARTINGALE · 20U / 1-SHOE
Grand Martingale (2x+1) — 20-Unit Bankroll & 1-Shoe (72-Hand) Risk-of-Ruin Matrix
Case M126-0 measures the discrete-time Grand Martingale (2x+1) (1-3-7-15-31-63-127) across a 20-unit bankroll and a 72-hand (1-shoe) window, where a 40-unit table ceiling and 10-unit stop-loss produce a 93.02% ruin rate while tracks an average stake survival-window of 1.67x and 2.13u ($53) 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 (-10u Stop)
- 93.02%
- Target Hit (+6u Cap)
- 16.77%
- 72-Hand Expected Hold
- 2.13u
- Table Max (5-Step Depth)
- 40u