IvanHoe 0B.01.08

[Damir Desevac]

I have managed to measure the speed increase between Ivanhoe and Houdini. Houdini has a speed advantage of almost 2000 kN/s. If you can make Ivanhoe as fast as Houdini + with its new time management, I am sure it would be able to surpass Houdini.

[robbolito]

Intel(R) Core(TM) i7 CPU 870 @ 2.93GHz 8.0 GB Memory
Windows 7 Home Premium Edition (Build 7600) 64 bit
Fritz Benchmark:
Speed: 13.09
KNS: 6280
GUI: Rybka 3
Book: Megabook 2011-10 moves
Hash:256
TB and GTB: ON
Ponder: OFF
Blitz: 5.0

Code: Select all

1   Houdini 1.5 x64       3190  +7/-5/=8 55.00%   11.0/20
2   IvanHoe 0B.01.09 x64  3190  +5/-7/=8 45.00%    9.0/20

[kingliveson]

I have managed to measure the speed increase between Ivanhoe and Houdini. Houdini has a speed advantage of almost 2000 kN/s. If you can make Ivanhoe as fast as Houdini + with its new time management, I am sure it would be able to surpass Houdini.

Not quite. There are several reasons Houdini is much stronger; better eval, search (pruning), and SMP implementation -- which also contribute to the speed difference. All I did was changed 2 lines of code and that won't be enough...

At very fast time control, I expect this build to be trashed like Rybka and other IvanHoe builds, so am really only looking at results for 10+0 and greater.

[Robert Houdart]

I have managed to measure the speed increase between Ivanhoe and Houdini. Houdini has a speed advantage of almost 2000 kN/s. If you can make Ivanhoe as fast as Houdini + with its new time management, I am sure it would be able to surpass Houdini.

It's not very useful to compare node speeds between different engines, each engine has its own metric of "node speed".

[robbolito]

Intel(R) Core(TM) i7 CPU 870 @ 2.93GHz 8.0 GB Memory
Windows 7 Home Premium Edition (Build 7600) 64 bit
Fritz Benchmark:
Speed: 13.09
KNS: 6280
GUI: Rybka 3
Book: Powerbook 2011-10 moves
Hash:256
RB and GTB: ON
Ponder: OFF
Blitz: 15.0

Code: Select all

1   Houdini 1.5 x64       3190  +10/-3/=17 61.67%   18.5/30
2   IvanHoe 0B.01.09 x64  3190  +3/-10/=17 38.33%   11.5/30

[kingliveson]

Intel(R) Core(TM) i7 CPU 870 @ 2.93GHz 8.0 GB Memory
Windows 7 Home Premium Edition (Build 7600) 64 bit
Fritz Benchmark:
Speed: 13.09
KNS: 6280
GUI: Rybka 3
Book: Powerbook 2011-10 moves
Hash:256
RB and GTB: ON
Ponder: OFF
Blitz: 15.0

Code: Select all

1   Houdini 1.5 x64       3190  +10/-3/=17 61.67%   18.5/30
2   IvanHoe 0B.01.09 x64  3190  +3/-10/=17 38.33%   11.5/30

Thanks for these -- I am getting similar results at 15+10 with current standing, +10/=10/-3. After the first few games, Houdini's chess engine pattern learning (CEPL) feature engaged full throttle.

[ernest]

Houdini's chess engine pattern learning (CEPL) feature

Hi,
Never heard about that...
Do you have more details, or links?

[kingliveson]

Houdini's chess engine pattern learning (CEPL) feature

Hi,
Never heard about that...
Do you have more details, or links?

You'll have to ask Robert, though am not sure he's willing to share...

[ernest]

You'll have to ask Robert

OK, I'll phrase that differently:
where did Robert mention that? (or was it privately with you? )

[UncombedCoconut]

Perhaps related to this joke?

Hi Robert,

Without going in to technical feedback {that I for one would not understand} have you written the code so that H1.5 makes use of previous analysis? I ask as I have read in many places that when H1.5 is used to play against other engines it is very strong in terms of results obtained, however, when a position is offered to H1.5 such that no previous information was available, the difference between H1.5 and other top engines {for example, R4} is less significant.

Is this something you are aware of?

ATB
David

Yes, Houdini 1.5 has pattern recognition and learning from previous versions games against all the engines. It uses adaptive Monte Carlo with multidimensional parameter adapter specific to each engine it's playing. If you give Houdini 1.5 a new position to analyze, its level is much lower than Rybka 4, which is known to have the best analysis of the new positions. Sorry, new positions are not the realm of non-Rybka 4 engines.

Kai