Houdini 1.5 (UCI Engine

The package contains Houdini_15_w32.exe for 32-bit Windows up to 4 cores and Houdini_15_x64.exe for 64-bit Windows up to 8 cores
Each executable contains code for optimal execution from single-core up to the maximum number of cores. On a 64-bit platform the 64-bit version is about 30% faster than the 32-bit version. If your hardware supports SSE4.2 the program will use the POPCNT instruction for another slight performance gain

The following UCI options are available

Hash: Amount of hash table memory used by the program in MB. Default 128, min 4, max 1024/16384 (32/64-bit)
Threads: Maximum number of cores used by the analysis. Default is hardware-dependent, min 1, max 4/8 (32/64 bit).
Split_Depth: Minimum depth at which work will be split between cores, see below. Default 10, min 8, max 99
Ponder: [game play only] Have the engine think during its opponent's time. True (1) or false (0)
Contempt: Level of contempt to avoid draws in game play. Default 1, min 0 (none), max 2 (aggressive)
Analysis_Contempt: [position analysis only] Activate Contempt in position analysis. True (1) or false (0)
MultiPV: [position analysis only] Number of principal variations shown. Default 1, min 1, max 16
GaviotaTbPath: Folder containing Gaviota EGTB files
GaviotaTbCache: Amount of Gaviota EGTB cache memory in MB. Default 64, min 4, max 1024
Hard_Probe_Depth: Minimum depth at which a hard EGTB probe is performed. Default 24, min 2, max 99
Soft_Probe_Depth: Minimum depth at which a soft EGTB probe is performed Default 16, min 2, max 99