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AutoBlackjack/blackjack_strategy.md

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+Strategy:
+
+Bet sizing (Hi-Lo count-based):
+    True Count ≤ 1: minimum bet
+    True Count  2:  2× minimum
+    True Count  3:  4× minimum
+    True Count  4:  6× minimum
+    True Count ≥ 5: maximum bet
+
+Card Counting (Hi-Lo):
+    Cards 2-6: +1
+    Cards 7-9:  0
+    Cards 10, J, Q, K, A: -1
+    True Count = Running Count / Estimated Decks Remaining
+    Assumes 6-deck shoe. Running count persists across rounds.
+    All visible cards (all players + dealer) are scanned at decision time.
+    Dealer reveal is also counted (Hook 4) for next-round accuracy.
+
+Illustrious 18 Deviations (applied when True Count thresholds met):
+    16 vs 10: STAND when TC ≥ 0 (basic says HIT)
+    16 vs  9: STAND when TC ≥ 5 (basic says HIT)
+    15 vs 10: STAND when TC ≥ 4 (basic says HIT)
+    12 vs  3: STAND when TC ≥ 2 (basic says HIT)
+    12 vs  2: STAND when TC ≥ 3 (basic says HIT)
+    10 vs 10: DOUBLE when TC ≥ 4 (basic says HIT)
+    10 vs  A: DOUBLE when TC ≥ 4 (basic says HIT)
+     9 vs  2: DOUBLE when TC ≥ 1 (basic says HIT)
+     9 vs  7: DOUBLE when TC ≥ 3 (basic says HIT)
+
+Soft totals: A soft total is any hand that has an Ace as one of the first two cards, the ace counts as 11 to start.
+
+    Soft 20 (A,9) always stands.
+    Soft 19 (A,8) doubles against dealer 6, otherwise stand.
+    Soft 18 (A,7) doubles against dealer 2 through 6, and hits against 9 through Ace, otherwise stand.
+    Soft 17 (A,6) doubles against dealer 3 through 6, otherwise hit.
+    Soft 16 (A,5) doubles against dealer 4 through 6, otherwise hit.
+    Soft 15 (A,4) doubles against dealer 4 through 6, otherwise hit.
+    Soft 14 (A,3) doubles against dealer 5 through 6, otherwise hit.
+    Soft 13 (A,2) doubles against dealer 5 through 6, otherwise hit.
+
+Hard totals: A hard total is any hand that does not start with an ace in it, or it has been dealt an ace that can only be counted as 1 instead of 11.
+
+    17 and up always stands.
+    16 stands against dealer 2 through 6, otherwise hit.
+    15 stands against dealer 2 through 6, otherwise hit.
+    14 stands against dealer 2 through 6, otherwise hit.
+    13 stands against dealer 2 through 6, otherwise hit.
+    12 stands against dealer 4 through 6, otherwise hit.
+    11 always doubles.
+    10 doubles against dealer 2 through 9 otherwise hit.
+    9 doubles against dealer 3 through 6 otherwise hit.
+    8 always hits.
+
+Splits:
+    Aces    : always split
+    10      : always stand        
+    9       : split vs dealer 2-9 except 7, else stand
+    8       : always split
+    7       : split vs dealer 2-7, else hit
+    6       : split vs dealer 2-6, else hit
+    5       : double vs dealer 2-9, else hit
+    4       : split vs dealer 5-6, else hit
+    1-3       : split vs dealer 2-7, else hit