Deploy a Dummy Echelon and move it to the right one node.
Set up a Bomb on the Gate, then move up one node and left one node.
End your turn.
Turn 2
2.1
Set up a bomb on the node you’re standing on, then move up one node and right one node.
End your turn.
Turn 3
3.1
Set up a bomb on the node you're standing on, then move right three nodes, down one node and set up another bomb on the Gate then move back up one node.
End your turn.
Turn 4
4.1
Move up one node, left two nodes, set up another bomb and then move right one node.
End your turn.