Cells marked with a green outline mean double if allowed, otherwise stand. Surrender cells mean surrender if offered, otherwise hit (or stand for hard 17 vs Ace). This chart updates live with your table rules.
Cross-checked against Wizard of Odds, Blackjack Apprenticeship, blackjackinfo, and Wong / Schlesinger. Every remaining disagreement above is a near-zero-EV tie; this table follows the mathematically correct multi-deck majority play in each case.