Article last updated: June 28, 2015
► CHECK NEW TOURNAMENT: Stockfish 6 vs Komodo 9
32 bit Single CPU Chess Engine Competitions
I am a big chess fan and also like some chess engines out there. Artificial Intelligence in this field is constantly improving and today all top chess engines have a stronger ELO rating than top grandmasters like Magnus Carlsen (Norway) and Viswanathan Anand (India).
But, why this article? In the era of 64-bit computing and multi-processor computer systems with multi-core CPUs there are many top chart lists of engine ratings with score sheet tables and all, but when it comes to a traditional 32-bit computing, those are much harder to find. This is why I have decided to test some top engines at the time of this writing (January 2015) plus some well-known for reference, and see how all compare on an old budget laptop with a single core processor.
32 bit Single Processor Single Core Chess Engine Tournament Score TOP Chart Results
Download results table as image file (PNG format)
| Rank | Engine | Score | StockFish | Houdini | Komodo | Deep Rybka | Crafty | SB |
|---|---|---|---|---|---|---|---|---|
| 1 | Stockfish_14053109_32bit | 12,5/16 | 1=1= | 1=11 | =1=1 | 1011 | 87,00 | |
| 2 | Houdini_4_Pro_w32 | 11,0/16 | 0=0= | ===1 | 1111 | =111 | 64,25 | |
| 3 | Komodo51r2-32bit | 9,0/16 | 0=00 | ===0 | =1=1 | 1111 | 46,75 | |
| 4 | Deep Rybka 4.1 w32 | 6,0/16 | =0=0 | 0000 | =0=0 | 1111 | 27,50 | |
| 5 | Crafty-23.4-win32 | 1,5/16 | 0100 | =000 | 0000 | 0000 | 18,00 |
* SB = Sonneborn Berger score
Legend:
0 … loss (0 points)
= … draw (0,5 points)
1 … win (1 point)
Total Games Played: 40 (4 games between each engine / total of 16 games per engine)
Maximum Theoretical Score: 16 points (16 wins)
Level: 3 seconds per move (fixed time)
Books: None
Ponder: OFF
Hardware: Intel(R) Celeron(R) M CPU 430 @ 1.73GHz with 1,9 GB Memory
Operating System: Microsoft Windows XP Professional Service Pack 3 (Build 2600) 32 bit
The above chart contains Crafty and Deep Rybka which are not in the top three, but present purely as a control-group and comparison engines.
Now we can compare this with the current (actual) CCRL 40/40 Top Chart from computerchess.org.uk website and see that there are big differences here: when it comes to 32-bit SC-SP arena Komodo is the 3rd and StockFish is still 1st!
DOWNLOAD
To stand to our claims and increase the credibility of the article, we provide a PGN file of the entire tournament for download (file can be opened with Notepad or similar text editor): StockFish-Houdini-Komodo-Rybka-Crafty Chess Engines Tournament (click to download zip archive)