It has been programmed for improvements in the the opening. These improvements are based on increased piece activity and space management and are demonstrated by its performance Fischer Random Chess. In the middle game Houdini 3 has significant enhancements for recognizing pieces with limited mobility and in king-side safety. In end games Houdini 3 will seek deeper and solve more positions than before.
Recently Houdini 3 played long matches against Houdini 2.0c, Stockfish 2.3.1 and Komodo 5. Each match consisted of 120 games at 90 min + 30 sec/move with the overall results that Houdini 3 scored 62%. In the Tactical Mode Houdini 3 will adapt its search strategy to prefer tactical solutions rather than positional moves in the root position which supposedly makes it the most proficient tactical position solver ever. The Accelerated Principal Variation Search or “Smart Fail-High” is especially useful in very deep analysis when a different move becomes best at very high search depth. Hash usage has been optimized and it will now support hash tables up to 256 GB.
Another major area of improvement is the engine evaluations have been recalibrated so that +1.00 pawn advantage gives a 80% chance of winning the game against an equal opponent at blitz time control. At +2.00 the engine will win 95% of the time, and at +3.00 about 99% of the time. If the advantage is +0.50, expect to win nearly 50% of the time. For further discussion of Houdini 3 visit their Facebook page.
If you prefer...the Aquarium interface:
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