Could you please share the over all time taken by your program for solving each size if N Queen board?
For me run time on intel CPU (2.33 GHz, 2 core, 4 logical processor) with 8 threads running simultaneously.
4x4 : 00:00:00.0319814
5x5 : 00:00:00.0369781
6x6 : 00:00:00.0329801
7x7 : 00:00:00.0569679
8x8 : 00:00:00.6336477
9x9 : 00:00:24.1766214
10x10 : 00:16:49.0784897
11x11 : 15:38:39.8509185