Preflop quiz

What's your play?

6-max · 40 bb
Pot 3.25 bb
UTGfold
HJlimp
1
CO40 bb
BTNto act
D
SBto act
0.5
BBto act
1
5♣4♣

A player limped before you. The limper is a typical recreational player: assumed limping range (small pairs, suited aces, connectors, weak broadways).

The answer comes from Exploit It's full preflop tree, the same one behind the Solver page and Play mode: chip-EV equilibrium, every position at the table, no ICM. EVs are counted from the start of the hand, posted blinds included. An action played at equilibrium, even rarely, counts as perfect.