Kinds of turn card

In this lesson

• Classify a turn card as an overcard, a draw completer, a pairing card or a blank.
• Say which player a turn card helps, given the action so far.
• Explain why the board grows more stable and pot control matters more.
• Track how a turn card changes range and nut advantage.

Read first: Flop bets by board type · Advice, not a lock: every lesson opens.

Concepts used: Dynamic and static boards, Range advantage, Nut advantage

Four kinds of turn card

The flop has been bet and called, and a fourth card comes. Before you think about your own hand, ask what the card does to the two ranges. Most turn cards fall into one of four kinds.

• An overcard: higher than every flop card. The preflop raiser holds more of the big cards, so it usually helps the raiser.
• A card that completes a draw: the third card of a suit, or the card that fills the obvious straight. It helps whoever holds more of the draws that called the flop, usually the caller.
• A pairing card: it pairs one of the flop cards. Few new strong hands appear, and the hands that were ahead mostly stay ahead.
• A low blank: below the board and connected to nothing. Little changes, and the flop's story goes on.

The words are for the ranges, not for your hand. A completing card can be a fine card for you if you hold the flush; it is still a bad card for the raiser's range, and the caller knows it.

What Rail's turn solves do with them

Rail solved the button's turn after its flop bet was called and the big blind checked, on many boards. The pattern is clear: the button bets most often when the turn pairs the board or brings an overcard, and least often when it puts a third card of a suit on the board. On that card even many top pairs check: one more card of the suit makes the caller's flushes, and the bet would be called by them and fold out the rest.

Hands with nothing at all bet a lot on the good cards: an overcard that the big blind cannot hold often, or a pairing card that changes nothing, lets a bluff represent the strong part of the raiser's range.

Count what the card makes

Nut advantage moves faster than range advantage on the turn. A completing card turns draws into the best hands at once, and you can count how many.

After a flop with two diamonds, ten diamonds are left in the deck. Any two of them make a flush once a third diamond lands: 10 × 9 / 2 = 45 combinations before ranges are applied. The caller's range keeps far more of those suited hands than an opener's range throws away, which is why the card is good for the caller.

A pairing card works the other way: it makes trips or full houses only for the few hands that hold that rank, and the raiser's overpairs and top pairs stay where they were.

Practising it

Sort turn cards first on the teaching ranges, then play the button's turn on real solves and see where Rail keeps betting.

The card sorting uses the concept library's hand-written teaching ranges. The turn drills are solved on demand from the charts' ranges narrowed through the flop by Rail's heuristic model, with one turn bet size, three quarters of the pot.

Rules of thumb

• Name the card's kind before your hand's: overcard, completing card, pairing card or blank.
• As the raiser, keep betting most on overcards and pairing cards; slow down on the card that completes the obvious draw.
• On a completing card, even good one-pair hands often check.
• Hands with no showdown value make the best bluffs on cards that favour your range.

When they break

• When your own hand holds the card that completes the draw, the range rule gives way: value-bet it.
• Against a caller who never draws to flushes, a third suited card is closer to a blank.

Example hands

Practice

The lesson is mastered when every exercise below that Rail can grade is passed. Missed items come back later as review cards.