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Deck penetration (aka “deck pen”) can drive card counter profitability more than most “good rules.” In this lesson, Colin breaks down what deck pen is, how casinos use it as a countermeasure, and why even a modest improvement can deliver ~30% more EV, with concrete examples and risk‑of‑ruin impacts.
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0:00 Intro
0:40 Good Rules vs Bad Rules
1:50 What is Deck Pen?
2:10 Deck Pen & EV
2:48 Evolution of Deck Pen
3:25 Casino Cost of Poor Deck Pen
4:50 Shuffle Machines
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