Lemmings 2 Polar "Snowed In" Lose 1

1-Throw 2 Ball to the left wall of the left starting area, so there is an 1-wide crevice. Floor with a Platform.
2-Get an explorer from the left area to the forest (Magno Boots, Jump) and Fence through it.
3-Jump an explorer past the right starting area, and at the floating piece Platform left, Jump before blocking.
4-Explode at the left hold, Fence the wall at the right hold.