Some Notes: -All engines 64-bit 1 Core (POPCNT are used where available) -According to CCRL,CEGT ratings: Houdini 1.5a is rated higher -Perfect 2015x book is fixed to use up to 8 moves (16 halfmove) -Calculated by Ordo 0.9.9 program / Fritz 15 is fixed to 3200 Elo