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I am looking for an UCI compatible engine with an ELO of less than 1800. Not a version of Houdini or Stockfish with an ELO of 1800. I want a engine with a real ELO rating of 1800 or less. If you can help me with links, that would be great.

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    You may want to have a look here: computerchess.org.uk/ccrl/404 and here: computerchess.org.uk/ccrl/4040 On the 40 moves in 40 minutes list there is only one engine with an Elo of less than 1800: Ziggurat 0.18 64-bit, with an Elo of 1786. (But I'm not totally sure these Elo ratings can be accurately compared to human FIDE Elo ratings.) – Fate Aug 10 '14 at 15:22
  • There is also the famous program Chess Titans, which has a rating of around 1700 Elo on level 10. (Chess Titans is included in Windows Vista and Windows 7, but not in Windows 8.) – Fate Aug 10 '14 at 15:29
  • Chess Titans is handicapped, I think. It has several times exchanged a queen for a rook for almost no advantage. – MikhailTal Aug 10 '14 at 15:34
  • Really? On level 10? I played a lot of games against it and it never made such blunders on level 10. – Fate Aug 10 '14 at 15:42
  • Well, it has happened only once to me. I won that game, but maybe I might have had a checkmate I hadn't noticed or something. – MikhailTal Aug 10 '14 at 15:43
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Take a look at numpty. It claims to have a ELO of about 1500-1800. I've played it on FICS before and it usually has a blitz rating of 1900-2100. Note that FICS ratings are usually horribly skewed by all the cheating that happens on there.

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Adam Hair has a rating list for weaker engines:

http://adamsccpages.blogspot.com/p/also-rans-rating-list.html

Grizzly and Chenard are UCI, but a lot of the weaker engines tend to be CECP.

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Actually, on the CCRL 40/4 there're around 170 engines under 1800, not just a dozen. You can also check this list based on bullet games: http://e4e6.com/ratings.php?id=1001 Most of the engines work properly, especially at long time controls. Almost all of them are still available on the Internet, just Google them.

Alex

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There is an engine called Delfi made by msb software. It is designed to play at lower ratings but also to play more like a human amateur. It is commercial, not free but I think there is a free version with some limitations.

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