The course
Learn the game, then learn its math
Two tracks. Foundations teaches poker from the first deal and is free from start to finish. The Mathematics of Poker turns every decision into numbers. Each lesson explains one idea, lets you play with it, checks that it stuck and sends you to the drill or table that trains it.
Free · 39 lessons Foundations
Eight short modules: how a hand works, hand rankings, counting cards and odds, position and starting hands, betting with a purpose, play after the flop and the tools a regular uses. Every lesson is free, and the exam at the end earns a certificate.
Module 1 How a hand of Hold'em works
Play a hand from the deal to the showdown without help: the seats, the blinds, the four betting rounds, your options and who wins the pot.
Module 2 Hand rankings
Name the best five-card hand on any board in a few seconds, kickers and ties included.
Module 3 Counting cards and odds
Turn cards into numbers: the deck, starting hands, combinations, odds and percentages.
Module 4 Position and starting hands
Why the seat you play from matters, and which hands make money from it.
Module 5 Betting with a purpose
Give every bet a reason: value or bluff, a size that fits, and the right action for the hand.
Module 6 After the flop
Read the board, tell made hands from draws, count your outs and plan the turn and river.
Module 7 The player's toolkit
Measure results, manage a bankroll, handle swings, read hand histories and stats, and study like a regular.
Module 8 Foundations capstone
A full hand from the deal to the showdown, then the exam and your certificate.
25 lessons The Mathematics of Poker
Twenty-five lessons in five parts, following the path of Bill Chen and Jerrod Ankenman's book The Mathematics of Poker: from expected value and variance, through reading and exploiting opponents, to game theory, bankroll risk and tournaments. Each lesson explains one idea, lets you play with it, checks that it stuck, and sends you to the drill or table that trains it.
Part 1 Basics
Decisions under risk: expected value, why results swing, and how to update beliefs with evidence.
Part 2 Exploitive play
Prices, hand reading and data: find the play that earns the most against the opponent in front of you.
Part 3 Optimal play
Game theory from toy games: indifference, bluffing ratios, bet sizing and strategies that cannot be exploited.
- Facing the nemesis: game theory
- Half-street games and the bluffing ratio Pro
- Heads-up with high blinds: jam or fold Pro
- Poker made simple: the AKQ game Pro
- You don't have to guess: no-limit bet sizing Pro
- Full-street games: when the opponent can bet too Pro
- The [0,1] game: continuous hands Pro
- The road to poker: several streets Pro
- Drawing out: hands that change Pro
- A case study: game theory at the table Pro
Part 4 Risk
Bankrolls: the chance of going broke, how much to risk, and how swaps and backing change it.
Part 5 Tournaments and more
Why tournament chips are not cash, how pots change with more players, and putting every tool together.
The Foundations lessons are original: every explanation, example and figure is our own. The lessons are original explanations of the ideas in The Mathematics of Poker by Bill Chen and Jerrod Ankenman (ConJelCo, 2006), arranged by its chapters, with Modern Poker Theory by Michael Acevedo (D&B Poker, 2019) as a second reference. This app is not affiliated with or endorsed by the authors or the publishers; read the books for the full derivations.
Free poker calculators
Free calculators and charts for the numbers behind every call. They run in your browser and show how each result is computed.
- Pot odds calculator
- Poker outs calculator: your odds of hitting a draw
- Poker EV calculator: expected value of a call, bet or bluff
- Poker equity calculator: exact hand vs hand odds
- Preflop odds chart: all 169 starting hands
- Push/fold chart: heads-up Nash shove and call ranges
- ICM calculator: tournament prize equity from chip stacks