Running count. True count. What changes?

01 / THE STARTING POINT

Keep track of the cards you have seen.

In the Hi-Lo system, each observed card changes the running count by +1, 0 or −1. Start a newly shuffled shoe at zero and keep the count across rounds until the next shuffle.

For example, reveal 5, K, 3, 8, A, 6, 2. Your count moves through +1, 0, +1, +1, 0, +1, +2.

Read more about the Hi-Lo fundamentals.

02 / THE MISSING CONTEXT

Divide by the decks remaining.

A +6 balance spread across six decks is different from +6 concentrated in two. Hi-Lo accounts for that with one calculation:

Try keeping RC at +6 and moving from three decks to two. TC rises from +2 to +3. Nothing changed in the running count; the same balance is now spread across fewer cards.

The same principle works below zero. RC −6 with three decks remaining gives TC −2. With two decks remaining, it gives TC −3: the negative imbalance becomes more concentrated.

Deck estimates can be fractional. For example, 130 cards represent 2.5 standard decks. RC +7 ÷ 2.5 gives TC +2.8. That assumes your inputs are accurate — a precise decimal cannot repair a missed card.

Other counting systems may use different divisors. QFIT explains the calculation and its conventions.

03 / THE EASY DETAIL TO MISS

Decimals can change a decision.

Calculating a fractional true count is one step. Converting it for a strategy index is another. For the same TC of −1.8:

• Truncate towards zero−1
• Floor to the lower integer−2
• Round to the nearest integer−2

Use the convention that belongs to the selected strategy’s index tables. The convention is part of the strategy.

04 / KEEP THE RIGHT EXPECTATIONS

The count is information, not a prediction.

TC does not reveal the next card or specify every action. The table rules and the decision stage still matter.

The dealer’s blackjack-check rules can change which action values apply. Compare the dealer-procedure assumptions in published EV tables.

Later in the reading path, compare two Insurance offers with the same TC. Aces and ten-value cards share a Hi-Lo value, but only the latter complete blackjack with the dealer’s Ace.

Penetration describes how far a shoe is dealt before reshuffling. It affects which count situations arise and how often. See how shoe depth affects the opportunities.

05 / MAKE IT STICK

Practise one skill at a time.

First count a sequence and check RC. Then practise dividing by the decks remaining. Once both feel comfortable, add a time limit.

If an answer is wrong, locate the step: was it a card value, a lost count, a deck estimate or the division? The Count Trainer offers snapshot exercises and a timed Live Shoe for those skills.