2026-10-02
Spanish 21 house edges, corrected
The Spanish 21 house edge figures now come from Katarina Walker's 10-billion-hand simulations (8-deck: 0.38% S17, 0.80% H17, 0.45% H17 with redouble) instead of our infinite-deck model, which ran about 0.09pp high. Strategy charts are unchanged — the plays were always right.