Notation glossary

One token vocabulary, used identically in the decision-node explorer, the line-frequency overview, session hand rows, and tags. Learn it once.

Action tokens

Token	Means
X	Check
F	Fold
C	Call
B<size>	A first-in bet, sized as a percentage of the pot before it.
R<size>	A raise over a bet. Same size buckets, different letter — facing a decision, a bet and a raise over one are different actions, not two sizes of the same one.

Bet-size buckets

Every B<size> and R<size> token is the action's size as a percentage of the pot before it, bucketed:

B20- B30 B50 B70 B100 B150 B200+

The boundaries are a judgment call kept as one ordered table in the code specifically so they're easy to retune without touching every caller — if your group's sizing conventions cluster differently, this is a one-file change.

Raises use the same bucket as bets

A raise's bucket is computed the same way as a bet's: the increment added, divided by the pot before that action — not the raise's total size relative to the previous bet. A raise over a B30 that adds 70% of the (now larger) pot reads as R70, not as "a 2.3x raise."

A full line

One segment per street reached, tokens within a street joined by a comma, streets joined by | :

X,B50,C | X,B70,C | X,B70,C

Read left to right: on the flop, someone checks, someone bets 50% pot, it's called; the turn opens with a check, a 70%-pot bet, a call; the river repeats that shape. A hand that never reaches the turn simply has no second segment — the line just ends where the hand did.

Why a comma, not a hyphen

B20- (the smallest bucket) already contains a literal hyphen. Joining tokens with a hyphen would make X-B20--C ambiguous to parse back apart. A comma has no such collision.

Position and role shorthand

Term	Means
IP / OOP	Hero acts last / first on the street — derived per hand from who actually acted first on the flop, not assumed from position alone (BB is IP against SB but OOP against BTN).
PFR	Hero was the preflop aggressor — the open-raiser, or whoever made the last raise (3-bet, 4-bet, ...).
PFC	Hero called a preflop raise rather than making it — the preflop defender.
SRP / 3bet / 4bet / 5bet+	Pot type by how many preflop raises occurred before it went to the flop.

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