n=30=self-2=n3=ne4=w6=e7=sw8=s的一些解(倒数方向总计10)
.00.78.00.00.67.48...00.68.47.78.68.47...00.00.68.47.67.48...00.78.78.00.00.00
.36.24.68.34.78.27...00.23.38.27.23.78...68.47.23.38.67.24...38.23.27.78.00.78
.00.00.26.34.23.00...00.00.23.00.36.24...23.00.00.23.00.00...26.34.36.24.36.24