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League

New rules Chess Engines Diary League - 01.06.2025


Due to the constantly growing number of engines we're testing, we're making some slight changes to the rules of the CEDR Chess Engine League.

Elite Chess Engine League - Top 64

We're still maintaining the Elite Chess Engine League - Top 64. This will now consist of two leagues with 20 engines in each group, and a third league with 24 engines, totaling 64 engines. Why "Top 64"? It's simple – there are 64 squares on a chessboard!

League Qualifiers

League qualifiers will now be held in a cup or swiss system. This change is designed to facilitate faster promotion for strong new engines.

The time control remains 3 minutes plus 3 seconds increment per move (3'+3").

#chessenginesdiary


Chess Engines Diary League - Season 07/2025

TOP-64 League, strongest chess engines CEDR
1 League Season 07/2025 Rating Score note
1. Stockfish 17.1 3761 23,0 (38)  
2. Integral v7 Dev 8bab JA 3718 21,5 (38)  
3. Obsidian 16.14 JA 3738 21,5 (38)  
4. PlentyChess 6.0.18 3731 21,5 (38)  
5. Stormphrax 7.0.0 3695 20,5 (38)  
6. Alexandria 8.1.2 3724 20,0 (38)  
7. Lc0 0.32.0 3702 19,5 (38)  
8. Clover 9.1 3672 19,5 (38)  
9. Quanticade Orion 2.0 3663 19,0 (38)  
10. Caissa 1.23 3714 19,0 (38)  
11. Motor 0.9.0 3685 19,0 (38)  
12. RubiChess 20250606 JA 3702 18,5 (38)  
13 Berserk 20250622 3721 18,5 (38)  
14. Dragon 3.3 3717 18,5 (38)  
15. Lizard 11.2 3681 18,0 (38)  
16. Viridithas 18.0 3698 17,5 (38)  
17 Velvet 9.0.0 dev-7 JA 3627 17,0 (38)  
18 Titan 1.1.0 JA 3642 17,0 (38) relegation
19 Uralochka 3.42a 3666 17,0 (38) relegation
20 Koivisto 9.20 JA 3615 14,0 (38) relegation
         
2 League Season 07/2025 Rating Score note
1. Halogen 15 3544 23,5 (38) promotion
2. Starzix 6.1 JA 3675 23,0 (38) promotion
3. Devre 6.39 JA 3657 21,5 (38) promotion
4. Rebel EAS 2.0 3651 21,0 (38)  
5. Renegade 1.2.0 3428 21,0 (38)  
6. Akimbo 1.1.0 JA 3634 20,0 (38)  
7. Spaghet-BologNNese 1.0 3623 19,5 (38)  
8. Booot 7.4 3654 19,5 (38)  
9. Seer 2.8.0 JA 3651 19,5 (38)  
10. Slowchess 2.9 3561 19,5 (38)  
11. Arasan 25.2 JA 3680 19,0 (38)  
12. Rofchade 3.1 3626 19,0 (38)  
13. Igel 3.6.3 JA 3653 19,0 (38)  
14. Clarity 8.0.0 3613 19,0 (38)  
15. Equisetum 1.30 JA 3486 18,0 (38)  
16. Peacekeeper 3.01 JA 3608 18,0 (38)  
17 Dragon free 3620 18,0 (38)  
18 Fire 10 mingw 3555 16,5 (38) relegation
19 Texel 1.13a4 JA 3555 13,5 (38) relegation
20 Wasp 7.07 3490 12,0 (38) relegation
         
3 League Season 07/2025 CEDR Score note
1. Pawn 4.0.4 JA 3540    
2. Superultra 2.1 JA 2544    
3. Minic 3.43 JA 3521    
4. Zangdar 5.00.02 2965    
5. Particia 5.0 3443    
6. Altair 7.2.1 JA 3593    
7. Sirius 9.0 3113    
8. Tenax 1.0 3554    
9. Willow 4.0 3499    
10. Carp 3.0.1 3517    
11. Marvin 6.3.0 JA 3456    
12. Winter 4.0 JA 3477    
13. Cheng4 0.48 3450    
14. Rice 8.0 3474    
15. Chess-System-Tal 2.1 EAS 3644    
16. Komodo 14.1 *free 3457    
17 Sapling 1.2.6 3100    
18 Weiss 2.1 JA 3442    
19 Counter 5.5 3395    
20 Pedantic 2.1.0 3365    
21 Astra 6.1.1 3679    
22 Lambergar 1.3 3059    
23 StockDory Starfish 0.1 3364    
24 Monty-dev-20241209 2400    





Chess Engines Diary League - Season 06/2025

TOP-64 League, strongest chess engines CEDR
1 League Season 06/2025 Rating Score note
1. Dragon 3.3 3715 21.0 / 38  
2. Berserk 20250622 3719 21.0 / 38  
3. Obsidian 16.14 3736 20.0 / 38  
4. PlentyChess 6.0.2 3721 20.0 / 38  
5. Stormphrax 7.0.0 3659 20.0 / 38  
6. Stockfish 17.1 3759 20.0 / 38  
7. Caissa 1.22.1 3711 19.5 / 38  
8. Integral 7 JA 3715 19.5 / 38  
9. Lizard 11.2 3679 19.5 / 38  
10. Viridithas 18 JA 3694 19.0 / 38  
11. Alexandria 8.0.0 3720 19.0 / 38  
12. Koivisto 9.20 JA 3612 19.0 / 38  
13 Clover 8.2.5 3668 18,5 / 38  
14. Uralochka 3.42 dev.14 3662 18,5  /38  
15. Lc0 0.32.0 rc1 3701 18.0 / 38  
16. RubiChess 20250606 JA 3700 18.0 / 38  
17 Motor 0.9.0 3689 18.0 / 38  
18 Starzix 6.1 JA 3673 18.0 / 38 relegation
19 Igel 3.6.3 JA 3651 17.0 / 38 relegation
20 Dragon free 3618 15,5 / 38 relegation
         
2 League Season 06/2025 Rating Score note
1. Quanticade Orion 2.0 3661 25/38 promotion
2. Velvet 9.0.0 dev-7 JA 3629 23,5/38 promotion
3. Titan 1.1.0 JA 3640 22,5/38 promotion
4. Halogen 14 3543 21/38  
5. Renegade 1.2.0 3428 21/38  
6. Seer 2.8.0 JA 3649 20,5/38  
7. Arasan 25.2 JA 3677 20,5/38  
8. Akimbo 1.1.0 JA 3623 20,5/38  
9. Devre 6.39 JA 3665 20/38  
10. Booot 7.4 3650 19,5/38  
11. Rebel EAS 2.0 3649 19/38  
12. Clarity 8.0.0 3611 19/38  
13. Spaghet-BologNNese 1.0 3622 18,5/38  
14. Peacekeeper 3.01 JA 3607 18,5/38  
15. Rofchade 3.1 3625 16,5/38  
16. Texel 1.13a4 JA 3546 16/38  
17 Slowchess 2.9 3560 15/38  
18 Pawn 4.0 3539 15/38 relegation
19 Superultra 2.1 JA 3543 14,5/38 relegation
20 Minic 3.43 JA 3519 14/38 relegation
         
3 League Season 06/2025 CEDR Score note
1. Equisetum 1.30 JA 3485 31/46 promotion
2. Wasp 7.07 3489 30,5/46 promotion
3. Fire 10 mingw 3583 30/46 promotion
4. Zangdar 4.04 JA 2962 28,5/46  
5. Particia 5.0 3435 28/46  
6. Altair 7.2.1 JA 3593 28/46  
7. Sirius 9.0 3113 26,5/46  
8. Tenax 1.0 3556 26,5/46  
9. Willow 4.0 3498 26/46  
10. Carp 3.0.1 3517 23,5/46  
11. Marvin 6.3.0 JA 3454 23,5/46  
12. Winter 4.0 JA 3420 23/46  
13. Cheng4 0.48 3382 22,5/46  
14. Rice 8.0 3478 22,5/46  
15. Chess-System-Tal 2.1 EAS 3642 22/46  
16. Komodo 14.1 *free 3456 21,5/46  
17 Sapling 1.2.6 3100 21,5/46  
18 Weiss 2.1 JA 3440 21,5/46  
19 Counter 5.5 3390 21/46  
20 Pedantic 2.1.0 3353 20/46  
21 Black Core 6.0 3419 19,5/46 relegation
22 Smallbrain 7.0 JA 3438 17,5/46 relegation
23 MrBob 1.3.0 JA 3319 17,5/46 relegation
24 Reckless 0.8.0 JA *crash 3158 0/46 relegation
 
Amateur Section
E-01 Season 06/2025 Rating Score note
1 Astra 6.1.1 2400  8,0/9 promotion
2 Lambergar 1.2 3057 7,5/9 promotion
3 StockDory Starfish 0.1 3360 6.0/9 promotion
4 Monty-dev-20241209 2400 5,5/9 promotion
5. Leorik 3.1.3 JA 2993 5,5/9  
6. Saturn 1.3 JA 3416 5,5/9  
7. Midnight v9 JA 3442 5,5/9  
8. Avalanche 2.1.0 3369 5,0/9  
9. Expositor 5 JA 3378 5,0/9  
10. Arcanum 2.6 2922 5,0/9  
11. Toga IV 1.1 JA 3369 4,5/9  
12. Xiphos 0.6.1 JA 3358 4,5/9  
13. Drofa 4.1.1 JA 3285 4,5/9  
14. Stash 37.10 JA 3396 4,5/9  
15. Danasah 9.1 JA 3251 4,5/9  
16. Demolito 2025-04-08 3242 4,5/9  
17 Svart 6 b2c7255 JA 3271 4,5/9  
18 Tucano 12.17 JA 3405 4,5/9  
19 ChessBrainVB 4.03a 3205 4,5/9  
20 Mittens 0.9 3176 4,5/9  
21 Frozenight 7.0.0 JA 3330 4,5/9  
22 Kuma 1.2 3295 4,0/9  
23 Pingu 5.0.0 2844 4,0/9  
24 Nalwald ab11891 JA 3316 4,0/9  
25 Odonata 1.0 JA 3303 4,0/9  
26 Cadie 2.1 3013 3,5/9  
27 Jet 1.2 3252 3,5/9  
28 Mida 2.3.1 JA 3038 3,5/9  
29 Saxton 1.0.0 2400 3,5/9 relegation
30 Flounder 0.5.0.2 3219 3,0/9 relegation
31 Polaris 1.8.1 3063 3,0/9 relegation
32 RukChess 4.1.0 *crash 3331 0,0/9 relegation
         
E-02 Season 06/2025 Rating Score note
1 Revenge 4.0 3636  8,0/9 promotion
2 Horsie 1.1.0 3689 7.0/9 promotion
3 Lynx 1.10.0 2849 6,5/9 promotion
4 Elixir 3.0 JA 3585 6.0/9 promotion
5. 4ku 5.1 3079 6.0/9  
6. Inanis 1.6.0 2972 5,5/9  
7. KnightX 4.5 2889 5,5/9  
8. Ceibo 1.0 2980 5,5/9  
9. Orion 1.0 NNUE 3084 5,0/9  
10. Lifish 1.0 NNUE 3257 5,0/9  
11. Kobra 2.0 JA 2641 5,0/9  
12. Wahoo 4.0.0 3129 5,0/9  
13. Vault 0.41 JA 2400 5,0/9  
14. Vengeance 3.1.0 JA 2988 4,5/9  
15. Princhess 0.20.0 dev.4b66 JA 3172 4,5/9  
16. Puffin 5.0 2695 4,5/9  
17 Dumb 2.3 2810 4,5/9  
18 Cheers 1.0.0 2894 4,5/9  
19 Ivanhoe 66 2870 4,5/9  
20 Anduril 3116 4,0/9  
21 The Baron 3.45 3007 4,0/9  
22 LTChess 9.3 3365 4,0/9  
23 CT800 1.46 2839 4,0/9  
24 Cheese 3.3.0 JA 3081 4,0/9  
25 Thrawn 2.1 JA 2415 4,0/9  
26 Mayhem 8.8 JA 2735 3,5/9  
27 Delocto 0.7 2870 3,5/9  
28 Rengar 2.1.1 2536 3,5/9  
29 Lux 4.2 2672 3,0/9 relegation
30 Cyrano 0.6b17 JA 2400 2,5/9 relegation
31 LizardBrain 2400 2,0/9 relegation
32 Sting Black Hole 10 *crash 3128 0,0/9 relegation
         
E-03 Season 06/2025 Rating Score note
1 Cinder 0.3.1 3575 7,5/9 promotion
2 Illumina 3.0 JA 2400 7.0/9 promotion
3 Perseus 1.1 2400 6,5/9 promotion
4 Chess-dot cpp 4.1.0 JA 2400 6.0/9 promotion
5. Priessnitz 2.0 2400 6.0/9  
6. EveAnn 3.4 2215 6.0/9  
7. Maestro Chess Engine 1.2.1 JA 2400 5,5/9  
8. Smaug 2.2.1 JA 2926 5,5/9  
9. Sturddle2 2.02 2400 5,0/9  
10. Protej dev-20250308a 3247 5,0/9  
11. Yakka 1.3 2894 5,0/9  
12. Shallow v5 2910 5,0/9  
13. Wize 1.0 JA 3014 5,0/9  
14. Euwe 2.1.0 JA 2400 5,0/9  
15. OpenTal 1.1 JA 2913 5,0/9  
16. GOOB 1.8.9 JA 3084 4,5/9  
17 Seawall 20250322 JA 2827 4,5/9  
18 MadChess 3.3 2820 4,5/9  
19 Bobcat 8.0 JA 2782 4,0/9  
20 Apotheosis 4.01 2851 4,0/9  
21 Aurora 1.26.0 2370 4,0/9  
22 Lishex 1.1.1 2755 4,0/9  
23 Catacomb 1 2704 4,0/9  
24 Javelin 3.0.0 2400 4,0/9  
25 Ice4 v6 JA 3051 3,5/9  
26 Rustic Knight 1.0.0 2400 3,5/9  
27 Ares 2.3.14 2611 3,5/9  
28 CeeChess 1.4 – Tuning 2376 3,5/9  
29 Queen 4.05 2602 2,5/9 relegation
30 Drosophila 1.6 JA 2787 2,5/9 relegation
31 Chessplusplus 1.2.0 2359 1,5/9 relegation
32 Albatros 1.0.0 2451 1,0/9 relegation
         
E-04 Season 06/2025 Rating Score note
1 Pawnocchio 1.8.1 2400 8,5/9 promotion
2 Ippolit 032324 3122  8,0/9 promotion
3 Potential 2 dev.3543 JA 2942 6,5/9 promotion
4 Colossus 2025b 2830 6.0/9 promotion
5. Seredina 1.2b JA 2400 6.0/9  
6. Clovis III 2879 5,5/9  
7. Jackal 1.2.0 2400 5,5/9  
8. Floyd 0.9 JA 2380 5,5/9  
9. LazySMP 9.0 2400 5,0/9  
10. Dog 3.0 2400 5,0/9  
11. Fornax 4.0 JA 2628 5,0/9  
12. Oxidation 0.7.2 2076 5,0/9  
13. Mephisto Gideon Professional 2400 5,0/9  
14. Shen Yu 2.0.1 2604 5,0/9  
15. Toad 3.0.0 JA 2400 4,5/9  
16. Luna 2.0.0 2689 4,5/9  
17 Raven 1.30 2682 4,5/9  
18 Barbarossa 0.7.0 2603 4,5/9  
19 ChessMaster 2023 2546 4,0/9  
20 Simplex 0.9.8 JA 2400 4,0/9  
21 Belette 3.0.0 2400 4,0/9  
22 Sentinel 2.0 JA 2400 4,0/9  
23 Raphael 1.8.0 2400 4,0/9  
24 Throttle 3.2.2 2400 3,5/9  
25 Stellar 1.4 2400 3,5/9  
26 Freda 1.1 JA 2177 3,5/9  
27 Camel 1.6.0 2168 3,0/9  
28 Cadabra 2.1.0 JA 2400 3,0/9  
29 Zagreus 5.0 2452 2,5/9 relegation
30 Neuromancer 1.5 2196 2,0/9 relegation
31 StoneChess 2024-09-13 2349 2,0/9 relegation
32 Dragonrose 0.26 2600 1,5/9 relegation
         
E-05 Season 06/2025 Rating Score note
1 Tarnished 4.0 2400 8,5/9 promotion
2 Prelude Fusion 2.0 2400 7,5/9 promotion
3 Admete 1.8.0 2640 6,5/9 promotion
4 Rodent IV 0.33 JA 2680 6,5/9 promotion
5. Meltdown 1.10 2400 6.0/9  
6. Beef 0.3.6 JA 2400 5,5/9  
7. Shuffle 5.2.0 JA 2450 5,5/9  
8. Tunguska 1.1 Dev.e003c68 JA 2611 5,5/9  
9. Kobol 1.1 2400 5,0/9  
10. Eubos 4.1 JA 2493 5,0/9  
11. Axon 0.3 2429 5,0/9  
12. Ifrit 4.03 JA 2639 5,0/9  
13. SSEHC 1.0 2400 5,0/9  
14. Lunarr 2.1.1 2453 5,0/9  
15. Crab 3.12.0 2400 4,5/9  
16. Sloth 2.1 2351 4,5/9  
17 Habu 1.0 JA 2400 4,5/9  
18 Halcyon 1 JA 2403 4,0/9  
19 Koedem 1.1.2 JA 2552 4,0/9  
20 Schneckbert 3.0 2400 4,0/9  
21 Nectar 0.2.2 2400 4,0/9  
22 Polonium 0.1.5 JA 2400 4,0/9  
23 Dodecahedron 0.0.12 JA 2400 4,0/9  
24 Fortuna 1.0 JA 2400 4,0/9  
25 Peripheral 1.1.3 2309 3,5/9  
26 Omelette 1.0 2400 3,5/9  
27 Motsog 22 2400 3,0/9  
28 Chesslib 0.0.3 Dev.1c05597 JA 2400 3,0/9  
29 Magog 1.0 2400 2,5/9 relegation
30 Kopyto 5df55e1 lub JA 2400 2,5/9 relegation
31 Eques 1.0.0 2400 2,5/9 relegation
32 Piglet 1.3.6 1855 0,5/9 relegation
     
E-06 Season 06/2025 Rating Score note
1 PZChessBot 3.0 2400 8,5/9 promotion
2 Seagull 1.0 JA 2400 7,5/9 promotion
3 Hardfiskur Rev.98eab6f JA 2400 6.0/9 promotion
4 Byte-knight 3.0.0 2400 6.0/9 promotion
5. Shallow Guess 0.4.0 2400 6.0/9  
6. Quirky 1.0 2400 5,5/9  
7. LimboBot NNUE 0.1 dev.bf92d06 JA 2400 5,5/9  
8. Jackychess 25.04 JA 2400 5,5/9  
9. Jence 1.0.2 2285 5,5/9  
10. Turbulence 0.0.8 2400 5,0/9  
11. Chess-3 2.0 JA 2400 5,0/9  
12. Kingfisher Dev.bb31a9a JA 2400 5,0/9  
13. Maello 0.1 Dev.2442bb4 JA 2400 4,5/9  
14. Goldfish 1.13.0 JA 2400 4,5/9  
15. Baryonyx 0.1.13 2400 4,5/9  
16. 100-Elo-Chess-Engine-1 2400 4,5/9  
17 GitChess 1.0 2400 4,5/9  
18 Topas 1.3.3 JA 2400 4,5/9  
19 Baislicka 1.0 Dev.2dae4e5 JA 2400 4,0/9  
20 Chers 0.8.0 2036 4,0/9  
21 Radiance 4.1 2400 4,0/9  
22 Clozza 1.0 JA 2400 4,0/9  
23 Purple Panda 19 2400 4,0/9  
24 Emerald 0.3.0 JA 2400 4,0/9  
25 Rust Chess Engine 0.1.7 2154 4,0/9  
26 Dual 0.2.6 2400 4,0/9  
27 Mcu-max 1.0.6 1233 3,5/9  
28 Pioneer 0.3.2 JA 2400 3,5/9  
29 Reggz 0.6.0 2400 3,5/9 relegation
30 Catto 0.12.5 2316 2,5/9 relegation
31 Fatalii 0.9.0 JA 2385 1,0/9 relegation
32 Rudim 1.4 JA 2400 0,0/9 relegation
     
E-07 Season 06/2025 Rating Score note
1 Weiawaga 6.0 2400 7,5/9 promotion
2 Zahak 10.0 JA 3327 7.0/9 promotion
3 Bitbit 1.4 JA 2400 6,5/9 promotion
4 Defenchess 2.3 JA 3307 6.0/9 promotion
5. Laser 1.8 JA 3293 6.0/9  
6. Cataphract 1.1 2400 6.0/9  
7. Senpai 2.0 JA 2832 6.0/9  
8. Tomcat 1.0 JA 2400 5,5/9  
9. Minke 1.0.0 2400 5,5/9  
10. Aku 2025.7.9 3179 5,0/9  
11. Olithink 5.11.9 2845 5,0/9  
12. Prophet 5.0 2370 5,0/9  
13. Jinx 1.0 JA 2415 5,0/9  
14. Alpaca 0.2.6 2400 5,0/9  
15. Knightcap 3.8 JA 2400 5,0/9  
16. Lozza 7.0 JA 2400 5,0/9  
17 RapCpw 2400 4,5/9  
18 Milky 0.2.0 2400 4,5/9  
19 Chessatron 1.3.14159 2400 4,0/9  
20 Natto Dev5aaa JA 2400 4,0/9  
21 Mochi 20250308 JA 2400 4,0/9  
22 BlueBetaFish dev-b3b8603 JA 2400 4,0/9  
23 Eggnog 6 dev-1cc JA 2400 4,0/9  
24 Kairuku 1.0.1 JA 2400 4,0/9  
25 Mufasa 0.2.1 JA 2400 3,5/9  
26 Goldfinger dev-ba5 JA 2400 3,5/9  
27 Tortoise 1.0 2400 3,5/9  
28 Melsh Bot 1.0 JA 2400 2,5/9  
29 Nibble 01r131 2400 2,5/9 relegation
30 DoctorB 1.2.1 JA 2400 2,5/9 relegation
31 Belofte 2.1.9 JA 2221 2,0/9 relegation
32 Tcheran 5.1 2242 0,0/9 relegation
     
E-08 Season 06/2025 Rating Score note
1 Eleanor 2.0 2400 7,5/9 promotion
2 Iris 2.0 2400 7,5/9 promotion
3 Anubis 3.01 JA 2400 6,5/9 promotion
4 Exocet 0.4.0 2400 6,5/9 promotion
5. Panda 1.1 JA 2400 5,5/9  
6. Rhetoric 1.4.3 2868 5,5/9  
7. Axolotl 1.9 JA 2400 5,5/9  
8. Juggernaut 1.01 2400 5,0/9  
9. Pluto 1.0.1 2400 5,0/9  
10. Pounce 1.2.4.8 JA 2400 5,0/9  
11. Adeon 1.2.1 2400 4,5/9  
12. Petrel 1.0 JA 2400 4,0/9  
13. Turncoat 1.0 JA 2400 4,0/9  
14. BenBot 1.2.16 2400 4,0/9  
15. Indus Dragon 0.1 JA 2400 4,0/9  
16. ArchDuchess 1.0 JA 2400 4,0/9  
17 Shadowfax 1.0.1 JA 2400 3,0/9  
18 Scam 0.4 2400 2,0/9  
19 Scorpio NN 3 dev.3af4 JA *crash 2400 1,0/9  
20 Draco-2025-06-01 *crash 2400 0,0/9  




TOP-64 qualifiers, 07/2024 edition




CEDR Chess Engines League archived results

Season 07/2025:
1 League, 2 League, 3 League. Qualifying: E01, E02, E03,E04,E05,E06,E07, E08. 

Season 06/2025:
1 League, 2 League, 3 League. Qualifying: E01, E02, E03,E04,E05,E06,E07, E08. 


♖ edition 03/2025 ♖ edition 06/2024 ♖ edition 05/2024 ♖ edition 04/2024 ♖ edition 03/2024 ♖ edition 01/2024♖edition 01/2023 ♖edition 02/2023  ♖ edition 03/2023  ♖ edition 04/2023   ♖ edition 05/2023  ♖ edition 06/2023  ♖ edition 07/2023  ♖ edition 08/2023  ♖ edition 01/2015 ♖ edition 08/2014 


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Chess Engines Diary League: games, tables and pdf.


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