Entanglement: a strategy guide

Minecraft doesn't work on my Chromebook, so I've been killing time playing Entanglement, a freemium game that's listed as one of the basic apps on Chrome.  I would like to discuss some of the strategies I've experimented with, and their relative success rates.

Simple survival

My initial strategy, when I was just figuring out how the game worked, was to try and fill up the whole board, figuring that the longer I stayed alive, the more points I was likely to end up with by the end.  This strategy yields very poor results -- the way scoring works in Entanglement, you get cumulative points based on the number of tiles your line passes through.  If you just pass through the one you place, you get 1 point.  If you pass through 2, you get 1 point for the first one, and 2 points for the second one: 3 points.  3 tiles is 6 points, 4 tiles is 10 points, and so on.

Simple line maximization

This is also a sub-ideal strategy -- every move, I did what I could to maximize the number of tiles I passed through while still coming out alive.  (If you hit either the center piece or any of the edges, your game ends.)  It doesn't tend to create much opportunity for big scores.

Safe Ring

This strategy entails creating a ring of tiles in the space between the center tile and the walls, so you maximize the number of tiles you can pass through that can't possibly drive you into a wall.  As a result, the mid-game tends to go along freely and comfortably.  It was the first remotely successful strategy I attempted.

Safe Island

This strategy entails carefully placing tiles around the center tile, using the corner and loop shapes, to construct a safe zone wherein no paths actually lead to the center tile.  My goal, similar to the Safe Ring strategy, was to make it impossible to hit a wall while still easy to move freely around the board.  It worked in theory, a couple of times, but mostly doesn't work because you just can't rely on getting the right tiles.

Building the Endgame

This is the strategy that yields the best results, as far as I've been able to tell.  You try your best not to die while carefully keeping track of another path, one you haven't yet taken, which you make as long as you possibly can -- then, once you're pretty much out of other options, you take that path into the wall to which it probably leads, raking in hundreds of points in one final, glorious move.