Well then , my head is hurting...
I can only figure out how to do this minus one snake
.
The problem is ofcourse that the west roach must be used to kill
the last snake at the bottom(south) (as far as I can see) while
BEFORE that i must use (or at least free) the northmost roach,
which then allways gets the other roach trapped in an ugly place
The best I could do was trap it agains the southwesternest diagonal
arrow, but then when it is freed it ofcourse cannot reach the
northest snake just above it, what can a poor delver do ?