广度优先、深度优先、A*算法、
Minimax算法(参考http://blog.csdn.net/zkybeck_ck/article/details/45644471)
Alpha-beta剪枝(参考http://blog.csdn.net/zkybeck_ck/article/details/45645031,http://blog.codinglabs.org/articles/2048-ai-analysis.html)