What also might not be commonly known is that whenever the code for these free chess engines is publicly available Jim will also recompile the code to run more efficiently. Jim’s recompiles of well-known chess engines often run better than the original chess program did!

Have a look at Jim’s work at: http://jimablett.hostwebs.com/ (no longer valid)

Edit: Jim’s site moved again and he has retired from his compilation work – a sad loss.

The final repository of Jim’s work is at: http://jimablett.net63.net/ (Edit: Sorry this link was later found to have 4(!) trojans in the download. I have removed the active link, but leave the location as anyone with an up to date virus scanner may still wish to visit).

(The old site at: http://homepages.tesco.net/henry.ablett/jims.html is no longer maintained.)

It is a testament to the quality of the work that Jim does in his recompiles that many of the authors of many free chess engines are now going to him to have their code “tweaked”.

So, if you are looking for free chess software in the form of winboard or UCI chess engines then Jim’s page is a good place to start.

Some of the files he hosts include (no particular order):

• Rival Chess
• Red Queen Chess
• Protector
• GNU Chess
• Simplex
• Greko
• Komodo
• Gez
• Mizar
• Sjeng
• Scorpio
• Chess One
• Crafty
• Beaches
• Fimbulwinter
• Sungorous
• Alibaba

And many, many more.

Stockfish – Free Chess Engine

As a separate word of note.  Jim also compiled the latest version of Stockfish.  Stockfish is a free chess engine that is now within a few Elo points of Rybka 4 (currently the world’s strongest chess engine).  This is a great achievement by the team behind Stockfish and it must be mentioned that they deserve full credit and the thanks of the community at large for making a chess engine of this quality freely available.

If for some reason the download is offline you can get the Stockfish chess engine from: https://stockfishchess.org

Also, take a look at the custom made opening book to suit the engine’s particular style of play.

About UCI and Winboard Chess Engines

Winboard and UCI compatible chess programs do not run on their own.  You need a GUI to operate them.  Thankfully there are a number of free chess interfaces available.

My personal recommendation is Arena – which is hosted at: http://www.playwitharena.com/

Full explanation of the various parts of the install is dealt with on the site and Arena even comes with an early (and free) version of Rybka.

Of course if installing all these bits of software is not your thing then feel free to try out our free online chess game here at computer chess online.

Happy playing!

Computer Chess Online - Jim Abletts Free Chess Engine Site has Moved

Grand Masters Use Computer Chess Programs

Top level players use chess software to assist in their chess analysis. If this is a solution for world-class chess grand masters then surely there is a use for chess software to also improve the games of players of lower ability also? While world class players may use complex and expensive clusters of many computers to enhance the speed of their analysis these resources are unlikely to be available to an ordinary player. What is available though is a multitude of chess engines, many of which are free, that are arguably stronger than any human chess Grandmaster. Such instruction and guidance would cost a lot of money if it was provided by a human instructor, yet a computer program can offer this for free.

Memorising Openings by Rote is Unproductive

Many beginners make the mistake of trying to improve their game by attempting to memorise openings, arguing that they suffer a tactical disadvantage early in the game from which they never recover. Analysis by an unbiased source, such as a chess program, will expose this as a fallacy in the majority of cases. At low levels of chess skill a player will have reasonable results by merely adhering to sound opening development theory, rather than spending time learning a particular opening by rote. After all, if they are playing against opponents of similar level, their opponent is very unlikely to play many of the normal “book moves” anyway. Surely it is far better to develop sharp tactical awareness and good concentration skills that will serve you well in almost any position you may come across.

Over the coming weeks and months, it is my intention to show how computer chess engines, when used appropriately, can contribute to a rapid increase in playing strength for players below the level of an International Master (IM).

In the meantime, please feel free to play chess online against computer opponents right here at computer chess online.

Computer Chess Online - Learning to Play Chess Online Against Computer Opponents