(Color online) Standard deviation of the strategies (denoted by ) as a function of the evolution time on different square lattices under the best-take-over rule given that .

<p>(a) Results on the square lattice with 4-player neighborhood and synchronous updating; (b) Results on the square lattice with 8-player neighborhood and synchronous updating; (c) Results on the square lattice with 4-player neighborhood and asynchronous updating; (d) Results on the square lattice with 8-player neighborhood and asynchronous updating.