HIARCS 10 Chess Engine Parameters
The HIARCS chess engine has many parameter options which can be modified to change the playing style and strength of the chess engine. We believe the default options were the best known at release but maybe you can find a better set of parameters!
Since release there has been evidence that the Hypermodern setting when switched ON improves Hiarcs 10 by about 10 Elo.
Below you will find the options available in the HIARCS
10 chess engine and a description of their affect on the engine. Any defaults
are in parentheses and explained in the text.
The hash table is typically large area of memory used by
the HIARCS chess engine to record previous calculations to speed up future
computations. You are recommended to use 50% of your machines physical RAM for
Hash tables. Please check that your hash table size setting does not cause disk
activity. If so HIARCS will run significantly slower - in this case please
decrease the hash table size and try again.
Retain Hash (ON)
This option enables HIARCS to maintain its hash table
between moves and this improves its play as well as its learning ability and
analysis. The default is ON.
Playing Style (Normal)
HIARCS has three different playing styles, namely,
Normal, Aggressive and Solid. The Normal style is the default and believed to be
Smart Search (ON)
This setting allows HIARCS to apply some smartness to
its search selections. The default is ON and this is the best setting.
The HIARCS search is selective - it tries to cut out
irrelevant moves and variations. You can set the selectivity from 0 (no
selectivity) to 7 (very selective). The default and strongest setting is 7.
This setting when ON allows Hiarcs to discard moves and
variations which appear to be futile. This enables a slightly deeper search at
the cost of a very small risk of overlooking something. Overall it appears to be
a gain so the default is ON.
Steady Search (OFF)
This setting tells Hiarcs to keep its search steady and
regular through its progressive deepening of search. At present this option has
the default OFF as it appears this is slightly the stronger setting.
Forward Pruning (10)
This setting determines how aggressive Hiarcs 10 prunes
the search tree to discard unnecessary variations and moves. The best setting
and default for this parameter is 10.
Threat Depth (3)
Using this setting you can determine how deep HIARCS
examines threats. The default is 3 and we believe this may be the best setting.
In positions which are normally drawn (for example K+R v
K+B), the swindle setting tells HIARCS to keep pressing for the win if it is the
stronger side. This is most applicable against human opponents. Default is OFF
as a courtesy.
Position Learning (ON)
This setting allows HIARCS to learn from the games it
plays. This can improve its play in future games. The default is ON.
This setting makes HIARCS look deeply at tactical
combinations. This setting can help HIARCS find combinations sooner but at the
cost of making the overall search less deep. When ON, this setting usually
results in weaker play. The default is OFF.
Hyper-Modern Play (OFF - it now seems ON is an improvement)
This setting make HIARCS play in a more Hyper-Modern
style. The default is OFF.
Use Tablebases (ON)
This setting allows you to turn access to Nalimov
endgame tablebases ON or OFF. The default is ON.
"It is exhilarating to play [HIARCS], more, a lot more than with any other strong program. It is a real pleasure to be defeated that way. Fast, lightning, unexpected death." - Fernando Villegas, April 2007
"HIARCS is much better positionally than Deep Blue." - Garry Kasparov 1997 (after game 5 of the rematch)
World Chess Champion, Vishy Anand, used "Powerful" HIARCS machine in preparations for his 2010 world title match with Super GM Veselin Topalov
"This level of service is one other big reason to buy HIARCS." - John Jackson, November 2009
Pocket PC and
Software with attitude, features and chess playing strength, you can't beat