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Free · no account · no data collected

Learn how advantage play works — and how it's detected.

TableSentry is a free blackjack learning tool covering Hi-Lo card counting, bet ramp analysis, and the Illustrious 18 — the same fundamentals used on both sides of the table, from the counting seat to the surveillance room.

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Hi-Lo · live demonstrationTRACKING
Running count
0
Cards seen
0
2–6 = +1 · 7–9 = 0 · 10–A = −1. The count tracks the ratio of high cards left in the shoe.
What's inside

Three skills, one workspace

01 · THE COUNT

Hi-Lo counting

Tap cards as they're exposed and watch the running count convert to a true count across 1, 2, 6, or 8 decks — with penetration and decks-remaining tracked automatically.

02 · THE MONEY

Bet ramp analysis

Log wagers round by round and see bet size plotted against the true count. A bet that climbs with the count is the classic signature of advantage play — and the chart makes it unmistakable.

03 · THE DECISIONS

Illustrious 18 deviations

Check any playing decision against basic strategy and the eighteen highest-value index plays. Learn to tell a count-correlated deviation from an ordinary mistake.

Who it's for

Both sides of the table

Gaming professionals

  • Surveillance operators building game-protection fundamentals
  • Dealers and floor supervisors learning what a bet ramp looks like
  • Training departments that want a hands-on teaching aid

Students of the game

  • Players curious how card counting actually works
  • Anyone studying the math behind the house edge
  • Practice at home — count a shoe, ramp your bets, check your plays
Who built it

Built by a surveillance professional

TableSentry mark

TableSentry was built by James Oliver, CSP — a casino surveillance manager with a background spanning military police, law enforcement, and game protection. It was created as a training aid for surveillance operators and is published free so anyone can learn the mechanics of advantage play, whether they watch the game or play it.

The fine print. TableSentry is an educational and training tool. It is not a device for use at a live table — using an electronic aid during play is illegal in most jurisdictions, and card counting without a device, while legal, can get you backed off or barred. For professionals: this is a detection aid, not a substitute for review of recorded play. It runs entirely in your browser, works offline, and collects nothing.

Open it. Count a shoe. See what surveillance sees.

Works on any phone, tablet, or PC. Installable from your browser.

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