Best Free Chess Engines of 2019

A listing of the strongest computer chess engines publicly available in 2019. Includes only those mainly run on cpus and not on gpus. Main development projects only not including hybrids or forks. Estimated Elo rating of the chess programs are enclosed in parenthesis.

Top Chess Engines


1. Stockfish 10 64-bit 4CPU (3463)
2. Komodo 13.0.2 64-bit 4CPU (3401)
3. Houdini 6 64-bit 4CPU (3398)
4. Ethereal 11.53 64-bit 4CPU (3330)
5. Fire 7.1  64-bit 4CPU (3321)
6. Xiphos 0.5 64-bit 4CPU (3316)
7. Komodo 12.3 MCTS 64-bit 4CPU (3294)
8. Laser 1.7 64-bit 4CPU (3282) 
9. Deep Shredder 13 64-bit 4CPU (3282)
10. Fizbo 2 64-bit 4CPU (3276)
11. Andscacs 0.95 64-bit 4CPU (3267)
12. Booot 6.3.1 64-bit 4CPU (3263)
13. RofChade 2.1 64-bit 4CPU (3250)
14. Schooner 2.1 64-bit 4CPU (3213)
15. Defenchess 2.2 64-bit (3210)

Top Free Chess Engines


1. Stockfish 10 64-bit 4CPU (3463)
2. Komodo 10 64-bit 4CPU (3347)
3. Ethereal 11.53 64-bit 4CPU (3330)
4. Fire 7.1 64-bit 4CPU (3321)
5. Xiphos 0.5 64-bit 4CPU (3316)
6. Laser 1.7 64-bit 4CPU (3282)
7. Fizbo 2 64-bit 4CPU (3276)
8. Andscacs 0.95 64-bit 4CPU (3267)
9. Booot 6.3.1 64-bit 4CPU (3263)
10. RofChade 2.1 64-bit 4CPU (3250)
11. Schooner 2.1 64-bit 4CPU (3213)
12. Defenchess 2.2 64-bit (3210)
13. Arasan 21.3 64-bit 4CPU (3195)
14. Houdini 1.5a 64-bit 4CPU (3186)
15. Gull 3 64-bit 4CPU (3181)

Per performance determined by the CCRL

Some known variants of the above chess programs have not been included and earlier versions and even some later versions have been excluded if they had poorer performance ratings.