implementation of the up-right algorithm discussed in http://asherv.com/threes/threemails/#letter
This script is the implementation of the algorithm mentioned by three's creators here. After running script approximately 20 times, my highest score is 4904. Usually you wont get a score below 1300.
To run the up-right technique drag the bookmarklet to your tab bar and click on it when in the 2048 game page.
← drag this button to your Bookmarks Bar