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STAGE 2 STRESS TEST · GRAND MARTINGALE VS FLAT BETTING
Grand Martingale (2x+1) vs. Flat 1-Unit Baseline — 18% Tie-Heavy Shoe under No-Commission Banker 6 Half-Pay (80-Hand Stress Test)
In head-to-head trial S120-0 across 80 deals (No-Comm High-Tie, 1.4579% edge), Grand Martingale records a -44u peak boundary and 29.90% ruin probability on a 85-unit stack, whereas Flat Betting logs a -17u trough and 5.73% ruin under the 60-unit limit. Because every 8-deck coup is statistically independent under No-Commission Banker 6 (0.50:1 on 6) (1.4579% edge), progression rules alter drawdown speed and table-cap collisions without changing per-hand expectation.
- Grand Martingale Ruin Rate
- 29.90%
- Flat Betting Ruin Rate
- 5.73%
- Peak Trough (5-Run)
- -44u
- No-Comm High-Tie House Edge
- 1.4579%