Joined: 1/27/2014
Posts: 181
Doing some route mapping of Solaris, for the first 8 maps. http://img.photobucket.com/albums/v484/obiwan18/Solarismaps_zps216c1404.png Route options are: West, North, West, North to level 8. (via minefield) West, South, West, North to level 8. (via corridor and additional enemy) At level 8, there's some choices. There's an extra life available, that may be worth taking. I don't believe the second extra life in the White zone north of level 8 is worth the time. I was able to make it all the way through to level 8 without losing a man, and lost my first man when I went to go pick up the extra life. The gap between level 1 and level 9 seems a little bit too long to be able to cross the barrier without losing a life.
Joined: 1/27/2014
Posts: 181
It's just possible to cross the barrier, refueling three times. Did some testing, it's possible to reach the brown section for your (first!) refuel. Then after clearing half the section, you can pick up two extra lives, and return back to the original map and the 1st West section, for your second refuel. Third refuel - it is possible to do it from the second brown map and cross the gap, but just barely. It would probably be easier to simply clear the first west map when you cross it (as you enter it 3 times. Yellow 1 (West than North/South, isn't useful. Going through the final section, it is possible to go all the way to the guaranteed red zone before you finally run out of fuel. You'll run out of fuel once more, (although a TAS may find it possible to lose just one life through the very long gap. It doesn't look like a deathless run is possible, without exploits. It is possible to beat the game without blowing up a planet, wait for the planet to be engaged by invaders and then you'll be able to pass through it.