Rybka vs best of other engines !

Last results of 5 minutes games:
   Engine                   Score 
1: Igorrit_0086v9_w32       14.5/25
2: Rybka 3 w32              14.0/25
3: IvanHoe-Beta-999968-Beta 13.0/24
4: RobboLito_009_w32        10.0/24
5: FireBird 1.0 beta w32    9.5/24

-----------------FireBird 1.0 beta w32-----------------
FireBird 1.0 beta w32 - Igorrit_0086v9_w32       : 2.0/6  33%  -123
FireBird 1.0 beta w32 - IvanHoe-Beta-999968-Beta : 1.5/6  25%  -191
FireBird 1.0 beta w32 - RobboLito_009_w32        : 3.5/6  58%   +56
FireBird 1.0 beta w32 - Rybka 3 w32              : 2.5/6  42%   -56
-----------------Igorrit_0086v9_w32-----------------
Igorrit_0086v9_w32 - FireBird 1.0 beta w32       : 4.0/6  67%  +123
Igorrit_0086v9_w32 - IvanHoe-Beta-999968-Beta    : 3.5/6  58%   +56
Igorrit_0086v9_w32 - RobboLito_009_w32           : 4.0/6  67%  +123
Igorrit_0086v9_w32 - Rybka 3 w32                 : 3.0/7  43%   -49
-----------------IvanHoe-Beta-999968-Beta-----------------
IvanHoe-Beta-999968-Beta - FireBird 1.0 beta w32 : 4.5/6  75%  +191
IvanHoe-Beta-999968-Beta - Igorrit_0086v9_w32    : 2.5/6  42%   -56
IvanHoe-Beta-999968-Beta - RobboLito_009_w32     : 3.0/6  50%    ±0
IvanHoe-Beta-999968-Beta - Rybka 3 w32           : 3.0/6  50%    ±0
-----------------RobboLito_009_w32-----------------
RobboLito_009_w32 - FireBird 1.0 beta w32        : 2.5/6  42%   -56
RobboLito_009_w32 - Igorrit_0086v9_w32           : 2.0/6  33%  -123
RobboLito_009_w32 - IvanHoe-Beta-999968-Beta     : 3.0/6  50%    ±0
RobboLito_009_w32 - Rybka 3 w32                  : 2.5/6  42%   -56
-----------------Rybka 3 w32-----------------
Rybka 3 w32 - FireBird 1.0 beta w32              : 3.5/6  58%   +56
Rybka 3 w32 - Igorrit_0086v9_w32                 : 4.0/7  57%   +49
Rybka 3 w32 - IvanHoe-Beta-999968-Beta           : 3.0/6  50%    ±0
Rybka 3 w32 - RobboLito_009_w32                  : 3.5/6  58%   +56

61 games shows that rybka 3(with 1 gb persistent hash) is stronger than all other engines or at least equal.
firebird 1.0 beta is weaker than other MP engines.
Note: In these games rybka used 1 gb persistent hash.
contempt play = 0.
other engines had 128 mb pawn hash.
hash table size for all engines was 256.
GUI is arena 2.0.1
Longer games maybe better for analysis.
Fischer random chess(chess 960) gives better view(for effect of persistent hash).
good luck.