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One of my students recently told me about a hand from a live $2-$5 no-limit hold’em cash game that demonstrates exactly how you should play a marginal underpair.
A loose, splashy player raised to $15 out of his $500 effective stack from first position at a seven-handed table and our Hero with 10
10
elected to three-bet from second position to $45.
While calling would normally be my default play because I do not want to get four-bet off my hand and there are lots of players yet to act, when facing a raise from a loose, splashy player, three-betting a strong linear range for value makes a lot of sense because you can expect him to call with numerous inferior hands, such as 8-8 and A
9
.
Against stronger players though, hands that are good, but non-premium, would usually be called, and you should three-bet with a more polarized range.
Everyone folded around to the initial raiser, who called. The flop came K
4
2
giving Hero a marginal underpair. The opponent checked.
This is an excellent spot to either check or bet small. If Hero checks behind, he can easily call a turn bet and can usually call a river bet if he thinks his opponent will somewhat frequently bet the turn and river as a bluff.
Hero can also bet small in order to extract value from numerous worse marginal made hands such as 8-8, A
2
, and A
5
. Betting also protects against various over cards such as A-Q and Q-J that have a decent amount of equity.
The main mistake many players make in this situation is to bet large, $80 or more, because then, they will usually only get called when they are in rough shape.
Hero bet $40 into the $95 and his opponent called.
While the $40 bet may seem exorbitantly small, it is perfectly fine. Do not feel as if you must make a bet that is at least as large as the bet on the previous betting round. The game is called “no-limit” for a reason. You can bet any amount, even a small one.
The turn was the 3
and the opponent checked.

Checking behind will ensure you do not get check-raised off your hand while ensuring you easily get to see the showdown.
Hero checked behind. The river was the 10
, giving Hero a set and completing the backdoor flush. The opponent bet $65 into the $175 pot.
At this point, Hero has the effective nuts and should raise. If he was against a weak, passive opponent, his raise may only get called by flushes and straights, but given the opponent’s loose, splashy tendencies, it is safe to assume he will call a reasonably-sized raise with perhaps top pair and better made hands.
Hero raised to $180 and the opponent quickly called with 4
3
for turned two pair.
Even though the turned three will usually not be a terrible card for Hero’s 10-10, by checking behind, he ensures he will not lose a large pot with a marginal hand.
Many players instead bet the turn because they think they have the best hand. While they may have the best hand, when a lot more money goes into the pot, 10-10 will usually be crushed. So, check behind and be content to play a medium-sized pot with a medium-strength hand. ♠
