[Spyder]

I think that escape should be based upon initiative disparity. If your initiative is significantly higher than another's, then you should be able to escape unharmed. However, the closer together you are, or, if he's higher than you, then you will face a higher risk of forced combat for the number of turns determined by the disparity.

Lets say that if your initiative is higher than his by 5 or more, you can choose to not fight at any time and remain unhurt. For each tick mark less in disparity, you have a 20% less chance of escaping, and in the instance where you do not, you must fight for the number of turns equal to the disparity before escaping.

Initiative can be modified by many things including cloaking tech, average ship speed, sensor tech, remaining movement, etc.

Another way it could be done is using remaining movement. If you warp with no movement left after warping, then you're going to fight...no way out. However, if you warp with movement left, the you have a percentage chance to evade equal to the percentage of remaining movment.