For example, one heuristic evaluation advocated in an online discussion of optimal 2048 play8 is to equally reward (1) each line where the maximum value is at one end, and (2) each empty cell of each line. This strategy, when coupled with optimized expectimax search of up to depth 8, was reported to achieve a 16384 tile in 13 out of 100 trials. Thus, heuristic evaluation need not be complex to be effective.