Wong Halves Count | Most Powerful Blackjack Strategy

Wong Halves: Fractional Precision at Its Finest

A balanced counting system using fractional values for more accurate tracking in multi-deck games.

May 5, 2025 • Noé Domínguez Aldana • 12 min read • Tags: #Level 3#WongHalves#Blackjack

Discover how Stanford Wong introduced fractional values in card counting to achieve greater precision and flexibility.

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Introduction

The Wong Halves system was popularized by Stanford Wong in the 1970s. Unlike Hi-Lo, it assigns fractional values to cards to more accurately fine-tune the player’s advantage.

Theoretical Foundations

Creator: Stanford Wong
Balanced: Yes
Values: Includes +1.5, +0.5, and –0.5
Requirement: Mastery of fractions and perfect basic strategy

“Wong Halves combines precision and flexibility, but demands mental discipline.”
Stanford Wong, Professional Blackjack

How It Works

Each card adds or subtracts a fractional value. Dividing the running count by decks remaining gives you the True Count.

5s: +1.5

3s, 4s & 6s: +1

2s & 7s: +0.5

8s: 0

9s: −0.5

10s–Aces: −1

True Count = Running Count ÷ Decks remaining

When to Increase Your Bet

Due to its greater precision, many recommend raising your bet when the True Count exceeds +1. Gradually adjust your bet spread to stay under the radar.

Pros, Cons & Pro Tips

Pros

🔹 Greater accuracy in multi-deck games
🔹 Balanced with no running count offset
🔹 More precise True Count

Cons

🔸 Harder to memorize fractional values
🔸 Slower under pressure
🔸 Requires intensive practice

Pro Tips

🔹 Train with fractional counting apps
🔹 Use mental shortcuts for +0.5 and –0.5
🔹 Pair with side counts in ace-neutral variants

References

🔹Wong, S. (1975). Professional Blackjack. HighMark Press.
🔹Griffin, P. (1999). The Theory of Blackjack.

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Last updated: 2025/05/25

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