"Candidates match" - Houdini v Rybka

[PawnStormZ]

 
       I have taken the first 10 moves from each of the games in the recent candidates tourney to create the 54 starting positions for this match.
 
       Each engine had 1 minute for the game, plus 1/10 second per move.  There were no losses on time.  The conditions were as follows:
 
       Players were the 64-bit versions of Houdini 1.5 and Rybka 4.1.  Match conditions: Intel core I7 920 at 2.66GHz using 4 cores HT off; Win 7 64 Home Premimum; 6G RAM; pc doing nothing but the match while a game is being played.
 
       Each engine uses default settings except for the split-depth of Houdini which is set to 12 (tested best on this pc); no large pages; no end-game tablebases; 512 hash each; 4 cores each; ponder off.
 
       I used the excellent "ChessGUI" to run the match, set to use "lag-free timing" and give each engine a 1/10th second "overstep" margin to help avoid any time losses.  Each position is played as Black and White by each engine.
 
               Engine                  Pts            W        D      L
 
               Houdini_1.5          64.0        + 34  = 60  - 14
 
               Rybka 4.1             44.0        + 14  = 60  - 34
 
 
        I am now running the identical match giving each engine 10 minutes for the game.  We can see which benefits more from 10 times more thinking-time.  
 
                                       The PGN of the games is here... http://www.datafilehost.com/download-5b4fc951.html