[en] It is assumed that the ''penguin'' interaction, introduced to explain the ΔI=1/2 rule, is not short distance dominated. An effective shiral field theory, including mesons coupling to quarks, is used to calculate the penguin loop contributions below a scale approximately=1 GeV. It is found that such contributions are enhanced and can probably account for half of the needed ΔI=1/2 enhancement. However, additional (non-penguin) effects have to be considered before any conclusion can be drawn within the considered chiral model