Sweden crushed Japan with 39-21 in the premiere on Thursday, but Chile is a class better and fell "only" with nine goals against Spain in their first match.
The Swedes were shaky defensively before the break.
Star goalkeeper Andreas Palicka had been given a break and was resting, and Fabian Norsten, Ålborg, started in goal.
He did well, but the Swedish defense left a lot to be desired.
It's very bad. We expect more from ourselves. It's not good enough, says midfielder Felix Möller to Viaplay.
"Toughened up the defense"
By then, Sweden had let in 19 goals and led by a single goal.
It was more fun in the second half than in the first, it was a bit chaotic in the first. We toughened up the defense in the second and got a different kind of aggression, says Michael Apelgren.
Sweden tightened up their defense at the start of the second half, played more aggressively and managed to pull away.
The Swedes scored 5-1 in the first five minutes and went up to 25-20.
"Fantastic fun"
Felix Möller continued to pour it on offensively after the break and ended up with ten goals, and right-back Albin Lagergren also had a productive evening with eight goals.
I know that if I'm even a little bit free, the pass will sit in my hand. They make it easy for me. It's fantastic fun to play for the national team, says Möller, the championship debutant, modestly.
Sweden concludes the first group stage with a top match against Spain on Monday. Spain defeated Japan with 39-20.
Then a defensive boost is required.
If we play that kind of defense we did in the first half today against the nations we'll meet ahead, we'll lose, says Hampus Wanne to Viaplay.
Fabian Norsten played for 50 minutes against Chile and has taken second position behind first-choice goalkeeper Andreas Palicka.
Right now, it's leaning towards that, his performances have been sharper than Thulin's, says Apelgren.
