You bet top pair, and a nit check-raises the river. Now what?
When a player who rarely raises suddenly does, that raise carries a lot of information. Most players hear it and call anyway, because top pair feels too strong to fold.
The hand
$1/$2 No-Limit Hold'em, 9-handed. You have $200, the big blind has $300. The big blind is a nit: plays very few hands and rarely puts money in without a strong one.
- You
- Button, A♠J♦ (top pair, good kicker)
- Preflop
- Folds to you. You raise to $10. The big blind calls.
- Flop
- 7♦A♣5♥ (pot $21) The big blind checks. You bet $10. The big blind calls.
- Turn
- 3♣ (pot $41) The big blind checks. You check.
- River
- Q♥ (pot $41) The big blind checks. You bet $25. The big blind raises to $75.
You have $50 to call into a $141 pot. What do you do?
How to think about it
1. Work out the price
You call $50 to win a pot that will be $191. So the call needs to win more than $50 ÷ $191 = 26.2% of the time to make money.
That's a good price. With only 26.2% needed, folding feels wrong. But the price only matters if you win that often.
2. Ask what a check-raise means from this player
This player checked the river and then raised your bet. A raise asks you to put in more, so it's only profitable for them with hands that beat the hands you'd call with, or as a bluff.
- Which hands that beat ace-jack could they have? Ace-queen and other two pairs, sets, and the straights that 6-4 and 4-2 make on this board.
- Which worse hands would they raise for value? Would a nit raise ace-ten, a weaker ace, here?
- How often does a nit pick the river to bluff-raise?
A general rule from our opponent models: when tight-passive players and nits raise on the turn or river, it is overwhelmingly two pair or better.
See the engine's answer
LevelUp's poker engine works out exactly what this player holds here, how often each option wins, and its dollar value against this opponent type. Play spots like this at an animated table, explain your reasoning, and find out which of your instincts are costing you money.
The takeaway
Raises from passive players are rarely bluffs. When a player who usually just calls suddenly raises, narrow their range to strong hands and be ready to let one pair go.