Beyond Basic Strategy

Basic strategy tells you the best play for every total against every dealer card. Advanced strategy goes further by considering:

  1. Hand composition — the specific cards that make up your total
  2. True count deviations — changing plays based on the card count
  3. Multi-card draws — adjusting after drawing additional cards
  4. Deck estimation — improving true count accuracy

Composition-Dependent Strategy

Basic strategy treats all hands with the same total identically. But the specific cards matter.

Example: Hard 16 vs. Dealer 10

Basic strategy says: Hit (or surrender).

But composition matters:

  • 10 + 6: Hit (standard)
  • 9 + 7: Hit (standard)
  • 5 + 5 + 6: Stand

Why? A hand of 5+5+6 has already consumed three small cards from the deck, making it slightly more likely that remaining cards are 10-value (which would bust you). The composition shifts the math just enough to favor standing.

When It Matters Most

Composition-dependent play matters most for:

  • Hard 12 vs. 4: Stand with 10+2, hit with other combinations
  • Hard 16 vs. 10: Stand with 3+ cards, hit with 2 cards
  • Hard 15 vs. 10: Surrender with 2 cards, hit with 3+ cards

The edge gained is very small (~0.01-0.03%), but it’s free — no extra effort if you’re paying attention to your cards anyway.

The Illustrious 18

Don Schlesinger identified the 18 most important strategy deviations based on the true count. These are the plays that gain the most from counting:

Index # Hand Dealer Basic Strategy Deviation True Count
1 Insurance A Don’t take Take +3
2 16 10 Hit Stand 0
3 15 10 Hit Stand +4
4 10,10 5 Stand Split +5
5 10,10 6 Stand Split +4
6 10 10 Hit Double +4
7 12 3 Hit Stand +2
8 12 2 Hit Stand +3
9 11 A Hit Double +1
10 9 2 Hit Double +1
11 10 A Hit Double +4
12 9 7 Hit Double +3
13 16 9 Hit Stand +5
14 13 2 Stand Hit -1
15 12 4 Stand Hit 0
16 12 5 Stand Hit -2
17 12 6 Stand Hit -1
18 13 3 Stand Hit -2

How to Read the Table

  • True Count: When the true count reaches this number, deviate from basic strategy
  • Index 1 (Insurance at +3): Take insurance when the true count is +3 or higher
  • Index 2 (16 vs 10 at 0): Stand on 16 vs. 10 when the true count is 0 or higher (instead of always hitting)

Prioritizing Deviations

The first 5-6 deviations capture the majority of the edge. Memorize those first:

  1. Insurance at +3
  2. Stand 16 vs 10 at 0+
  3. Stand 15 vs 10 at +4
  4. Split 10s vs 5 at +5
  5. Split 10s vs 6 at +4
  6. Double 10 vs 10 at +4

Deck Estimation

Converting running count to true count requires estimating remaining decks. Improve accuracy by:

  • Watch the discard tray — estimate how many decks have been played
  • Subtract from total — if 6-deck shoe with 2 decks in the tray, 4 remain
  • Practice eyeballing — get comfortable estimating half-deck increments
  • Round conservatively — round up remaining decks slightly (reduces risk)

Wonging (Back-Counting)

Developed by Stanford Wong:

  1. Stand behind the table and count without playing
  2. When the count becomes favorable (+2 or higher), sit down and play with large bets
  3. When the count becomes unfavorable, leave the table
  4. Move to another table and repeat

Advantages

  • Avoids playing with a negative count (where you’d lose)
  • Maximizes time playing with an advantage
  • Greatly increases hourly win rate

Disadvantages

  • Casinos ban this practice at many tables
  • Requires constant attention without playing
  • Obvious to surveillance if done repeatedly

Summary

Technique Edge Gain Difficulty Practicality
Basic strategy (baseline) ~4.5% improvement over average play Easy Essential
Composition-dependent +0.01-0.03% Low Free with attention
Card counting (Hi-Lo) +0.5-1.0% Moderate Requires practice
Illustrious 18 deviations +0.1-0.2% Moderate Important for counters
Wonging +0.5-1.0% additional Moderate Increasingly banned
Advanced shuffle tracking +0.5-1.5% Very high Rare mastery