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HIARCS (Computer)
Number of games in database: 145
Years covered: 1992 to 2013
Overall record: +59 -33 =53 (59.0%)*
   * Overall winning percentage = (wins+draws/2) / total games.

Repertoire Explorer
Most played openings
B90 Sicilian, Najdorf (11 games)
E92 King's Indian (4 games)
C43 Petrov, Modern Attack (4 games)
B47 Sicilian, Taimanov (Bastrikov) Variation (3 games)
D27 Queen's Gambit Accepted, Classical (3 games)
D31 Queen's Gambit Declined (3 games)
C11 French (3 games)
B97 Sicilian, Najdorf (3 games)
A07 King's Indian Attack (3 games)
D02 Queen's Pawn Game (3 games)

   🏆 nTCEC - Stage 3 - Season 2
   Gull vs HIARCS (Oct-27-13) 0-1
   HIARCS vs Stockfish (Oct-22-13) 1/2-1/2
   HIARCS vs Critter (Oct-20-13) 1/2-1/2
   Stockfish vs HIARCS (Sep-30-13) 1-0
   Bouquet vs HIARCS (Sep-29-13) 1-0

Search Sacrifice Explorer for HIARCS (Computer)
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(born 1980) United Kingdom

[what is this?]
Higher Intelligence Auto Response Chess System is programmed by Mark Uniacke and one of its operators is Harvey Williamson. HIARCS runs on both Macintosh and Windows operating systems, as well as handheld devices.

References: (1) (iTunes/AppStore), (2)

 page 1 of 6; games 1-25 of 145  PGN Download
Game  ResultMoves YearEvent/LocaleOpening
1. Fritz vs HIARCS ½-½601992Madrid 7th WCCCC51 Evans Gambit
2. HIARCS vs B Butler  1-0491994ANU Carbon v Silicon MatchD52 Queen's Gambit Declined
3. M Roeder vs HIARCS  1-0711994ANU Carbon v Silicon MatchA54 Old Indian, Ukrainian Variation, 4.Nf3
4. HIARCS vs R Farrell  1-0471994ANU Carbon v Silicon MatchB09 Pirc, Austrian Attack
5. G West vs HIARCS  1-0481994ANU Carbon v Silicon MatchC28 Vienna Game
6. HIARCS vs T Reilly  1-0451994ANU Carbon v Silicon MatchB09 Pirc, Austrian Attack
7. Shabalov vs HIARCS  ½-½8819945th Harvard CupB82 Sicilian, Scheveningen
8. Gulko vs HIARCS ½-½6019945th Harvard CupA07 King's Indian Attack
9. Yermolinsky vs HIARCS  1-03119945th Harvard CupA46 Queen's Pawn Game
10. HIARCS vs Joel Benjamin 0-17119945th Harvard CupE34 Nimzo-Indian, Classical, Noa Variation
11. HIARCS vs Zsofia Polgar  1-0491996The Hague AEGONB47 Sicilian, Taimanov (Bastrikov) Variation
12. HIARCS vs L Arzeno  1-0401997SANTO DOMINGO,SAMANEL IIIC92 Ruy Lopez, Closed
13. A Adames vs HIARCS 0-1441997SANTO DOMINGO,SAMANEL IIID05 Queen's Pawn Game
14. M Corvi vs HIARCS  0-1391997All. Computer CorvD02 Queen's Pawn Game
15. O Sarapu vs HIARCS 1-0111997Computer GameB40 Sicilian
16. HIARCS vs M Corvi  0-1481997All. Computer CorvA90 Dutch
17. G S Hernandez vs HIARCS  ½-½521997SANTO DOMINGO,SAMANEL IIIE17 Queen's Indian
18. HIARCS vs L Karlsson  ½-½611997HaningeC03 French, Tarrasch
19. N Pinal vs HIARCS  ½-½241997SANTO DOMINGO,SAMANEL IIIB17 Caro-Kann, Steinitz Variation
20. L Karlsson vs HIARCS  ½-½331997HaningeA14 English
21. HIARCS vs D Hergott  1-0431997Hergott- matchC05 French, Tarrasch
22. D Hergott vs HIARCS  ½-½751997Hergott- matchA49 King's Indian, Fianchetto without c4
23. HIARCS vs D Hergott  1-0491997Hergott- matchA56 Benoni Defense
24. D Hergott vs HIARCS  ½-½361997Hergott- matchA07 King's Indian Attack
25. Timman vs HIARCS  ½-½371997AEGON SimulD75 Neo-Grunfeld, Nxd5, 7.O-O c5, 8.dxc5
 page 1 of 6; games 1-25 of 145  PGN Download
  REFINE SEARCH:   White wins (1-0) | Black wins (0-1) | Draws (1/2-1/2) | HIARCS wins | HIARCS loses  

Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Aug-03-06  fevered cheek: ok cg, thanks
Aug-03-06  iWaNnAbAgM: So<fevered cheek>where should we finish the game?
Aug-03-06  fevered cheek: i have a friend with a premium membership, he'll let us use his forum. his username is seven trumpets
Aug-03-06  iWaNnAbAgM: Alright,so when do you wanna start?
Aug-03-06  fevered cheek: let's start now, i have about an hour before i have to go
Oct-15-06  Loisp: hiarcs 9 cannot find the classic sac Bxh7 after 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Qc7 7. Nf3 Ne7 8. a4b6 9. Bb5+ Bd7 10. Bd3 Nbc6 11. O-O O-O on my pc(chessbase gui). i heard about 'agressive' mode, how is it activated?
Premium Chessgames Member
  Albertan: Hi Loisp to activate "aggressive" mode in Hiarcs 9, first click on the engine menu, then click on "change main engine" then click on "engine parameters" and go into the "playing style window" and change it to "aggressive" if it is not already set there.

Nov-08-06  James Bowman: I have Hiarcs running on my Dell Axim handheld, I have no Idea what playing strength it is, but it is very suseptable to attacks on the H file in a semi-closed position. In an open position where it can give itself chances on both sides of the board it kills me. This is using the fruit engine that comes with it. I get very bored playing it as the games are always are very similar and I am going to load some more engines and try them. Maybee I will download some games as an example.
Sep-09-07  minasina: Wikipediassa Chess_engine_rating_lists:
Jan-02-08  Karpova: Hiarcs won the 17th International Paderborn Computer Chess Championship with 5.5/7 ahead of Rybka (also 5.5/7 but a slightly worse Buchholz).

Hiarcs drew Rybka, Cluster Toga (third place with 5.0/7), Spike and won all the other games.

Jan-05-08  Open Defence: any idea what platform HIARCS was running on at Paderborn ? are there any strength differences between the Mac and Windows versions ?
Jan-26-08  Open Defence: how does one perform analysis using the engine directly without the GUI I believe this is by typing commands through the <root> ?
Jun-29-08  Jim Bartle: I downloaded the free version of Hiarcs the other day and find something odd. If I give it an hour for forty moves, it seems to use 40 minutes for the first twenty moves (including however many are in its opening database), then ends up with 30 seconds or so per move as move 40 approaches.

Anybody else find the same problem?

Jun-29-08  Red October: you could ask on the hiarcs forum
Jun-29-08  lopium: <Jim Bartle: I downloaded the free version of Hiarcs the other day and find something odd. If I give it an hour for forty moves, it seems to use 40 minutes for the first twenty moves (including however many are in its opening database), then ends up with 30 seconds or so per move as move 40 approaches.

Anybody else find the same problem?> I'm not sure about this, but maybe it's because it's the free version of Hiarcs. Generally engines will spend much more time for the first 8 moves or so, and then play faster. It's a strategy. If they enter in a good middle/endgame, they won't have to spend so much time to keep the advantage they got in the opening/middle game. When in endgame, if you use an endgame tablebase, then it will use it, so I guess it has an accurate judgment of the position without thinking that much. Thesedays I usually let play Deep Shredder 11 on FICS, and of course it spend much more time in the first moves (not the very begining since I use an opening book) it thinks. I never calculated the proportion. I also have Hiarcs 12, but I find it worse than Hiarcs 11, so I don't even use it. Last time I tested it, it lost on time in a 20 minutes game, which is unnormal for a chess engine. It's quite likely a problem of my engine, not the Hiarcs 12 you may buy. I have to check it out.

Jun-29-08  Jim Bartle: Thanks to both.
Jul-11-09  Open Defence:
Jul-23-09  Open Defence: The HIARCS engine written by programmer Mark Uniacke.
Sep-05-09  Open Defence: has a short write up about HIARCS for handheld devices

this progam won at Mercosur 2009 9.5/10 but in the Pocket Fritz 4 GUI (the HIARCS Engine is in Pocket Fritz)

Apr-24-10  Open Defence: HIARCS 13.1 for Mac has been released, the PC version is also expected to follow sometime
May-12-10  Open Defence: per Harvey Williamson's (a prominent member of the HIARCS development team) post here

World Champion Vishwanathan Anand's team had access to Harvey's machine with HIARCS and his databases / opening books etc

Premium Chessgames Member
  wordfunph: Chess Piece by Bobby Ang..

<So why am I suddenly showing you my private collection of chess engine test games? Well, because for the first time in my life there is a chess engine which solved all of the above in less than a minute. I can state with certainty that HiArcs 14 is the strongest chess engine for the PC that I have ever seen. Look it up at

This is not a paid advertisement.

Test your engine.>

Premium Chessgames Member
  whiteshark: "I subscribe to your Powerbook now and I'm pretty impressed by it, I use it all the time in my chess teaching. As far as I know it is the best publicly available book."

-- Larry Kaufman, Grandmaster and World Senior Chess Champion.

Jan-29-15  waustad: When upgradingto the latestversion of Os X it nuked my old free HIARCS. Looking at their website I wonder if it is worth it to go for the deep version. I'm probably not strong enough to need all of the extra features, but the tablebase interface could be valuable.
Jan-30-15  zanzibar: <waustad> You might consider trying SCID (Shane's Chess Information Database).

Here's the download link for Mac OS X v4.4:

I believe it comes with an older version of Stockfish. The lastest version is available here:

(Hey, I'm out of date, I only have v5)

Another engine I'm fond of is Critter 1.6a - with a good style of play and a rating of 3174 it's more than adequate for a second opinion:

SCID is great software, if you don't know it, give it a try.

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