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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. Astra 6.1.1 3679 33,0 (46) promotion
2. Altair 7.2.1 JA 3593 32,0 (46) promotion
3. Zangdar 5.00.02 2965 30,5 (46) promotion
4. Tenax 1.0 3554 29,0 (46)  
5. Sirius 9.0 3113 29,0 (46)  
6. Carp 3.0.1 3517 27,5 (46)  
7. Superultra 2.1 JA 2544 26,0 (46)  
8. Winter 4.0 JA 3477 25,0 (46)  
9. Pawn 4.0.4 JA 3540 25,0 (46)  
10. Weiss 2.1 JA 3442 24,5 (46)  
11. Cheng4 0.48 3450 23,5 (46)  
12. Marvin 6.3.0 JA 3456 23,5 (46)  
13. Minic 3.43 JA 3521 23,5 (46)  
14. Counter 5.5 3395 22,5 (46)  
15. Komodo 14.1 *free 3457 22,5 (46)  
16. Monty-dev-20241209 2400 22,0 (46)  
17 Lambergar 1.3 3059 21,5 (46)  
18 Chess-System-Tal 2.1 EAS 3644 21,5 (46)  
19 Willow 4.0 3499 21,5 (46)  
20 Sapling 1.2.6 3100 20,0 (46)  
21 Rice 8.0 3474 18,0 (46)  
22 Pedantic 2.1.0 3365 17,5 (46) relegation
23 StockDory Starfish 0.1 3364 13,0 (46) relegation
24 Particia 5.0 *crash 3443 0,0 (46) relegation
 
Amateur Section
E-01 Season 07/2025 Rating Score note
1 Horsie 1.1.0 3692 7,5/9 promotion
2 Reckless 0.8.0 3360 7,5/9 promotion
3 Revenge 4.0 3639 6.0/9 promotion
4 Tucano 12.17 JA 3406 6.0/9  
5. Elixir 3.0 JA 3584 6.0/9  
6. Nalwald ab11891 JA 3318 5,5/9  
7. Midnight v9 JA 3443 5,0/9  
8. Smallbrain 7.0 JA 3440 5,0/9  
9. Stash 37.10 JA 3397 5,0/9  
10. Black Core 6.0 3420 5,0/9  
11. Arcanum 2.6 3324 5,0/9  
12. Saturn 1.3 JA 3437 4,5/9  
13. Mida 2.3.1 JA 3040 4,5/9  
14. Leorik 3.1.3 JA 2993 4,5/9  
15. Avalanche 2.1.0 3371 4,5/9  
16. MrBob 1.3.0 JA 3370 4,5/9  
17 Pingu 5.0.0 2844 4,5/9  
18 Xiphos 0.6.1 JA 3360 4,5/9  
19 Drofa 4.1.1 JA 3285 4,5/9  
20 Frozenight 7.0.0 JA 3332 4,0/9  
21 Odonata 1.0 JA 3305 4,0/9  
22 Danasah 9.1 JA 3253 4,0/9  
23 Toga IV 1.1 JA 3371 4,0/9  
24 Mittens 0.9 3179 3,5/9  
25 Lynx 1.10.0 2849 3,5/9  
26 Kuma 1.2 3295 3,5/9  
27 Cadie 2.1 3016 3,5/9  
28 Demolito 2025-04-08 3244 3,5/9  
29 Jet 1.2 3252 3,5/9 relegation
30 Expositor 5 JA 3379 3,5/9 relegation
31 ChessBrainVB 4.03a 3205 2,0/9 relegation
32 Svart 6 b2c7255 JA 3273 2,0/9 relegation
         
E-02 Season 07/2025 Rating Score note
1 Chess-dot cpp 4.1.0 JA 2400 7.0/9  
2 Cinder 0.3.1 3575 7.0/9  
3 Illumina 3.0 JA 2400 6,5/9  
4 RukChess 4.1.0 JA 3331 6,5/9  
5. Lifish 1.0 NNUE 3257 6.0/9  
6. Perseus 1.1 JA 2400 5,5/9  
7. Princhess 0.20.0 dev.4b66 JA 3183 5,5/9  
8. Flounder 0.5.0.2 3221 5,5/9  
9. Saxton 1.0.0 2400 5,5/9  
10. Wahoo 4.0.0 3123 5,0/9  
11. Vengeance 3.1.0 JA 2995 5,0/9  
12. Vault 0.41 JA 2400 5,0/9  
13. Orion 1.0 NNUE 3084 4,5/9  
14. Puffin 5.0 2695 4,5/9  
15. Cheers 1.0.0 2894 4,5/9  
16. Thrawn 2.1 JA 2415 4,5/9  
17 Rengar 2.1.1 2536 4,5/9  
18 Anduril 3116 4,5/9  
19 4ku 5.1 3088 4,5/9  
20 Ceibo 1.0 2987 4,5/9  
21 The Baron 3.45 3008 4,5/9  
22 Inanis 1.6.0 2972 4,5/9  
23 Polaris 1.8.1 3065 4,0/9  
24 Kobra 2.0 JA 2641 4,0/9  
25 KnightX 4.5 2893 3,5/9  
26 Cheese 3.3.0 JA 3081 3,5/9  
27 CT800 1.46 2845 3,5/9  
28 Dumb 2.3 2810 3,0/9  
29 Mayhem 8.8 JA 2736 2,5/9  
30 LTChess 9.3 3360 2,0/9  
31 Ivanhoe 66 2877 1,5/9  
32 Delocto 0.7 2873 1,5/9  
         
E-03 Season 07/2025 Rating Score note
1 Pawnocchio 1.8.1 3666 9.0/9  
2 Maestro Chess Engine 1.2.1 JA 2400 8.0/9  
3 Seredina 1.2b JA 2400 6,5/9  
4 EveAnn 3.4 2215 5,5/9  
5. Ippolit 032324 3125 5,5/9  
6. Sturddle 2.3 2400 5,5/9  
7. Protej dev-20250308a 3254 5,5/9  
8. Potential 3 2974 5,5/9  
9. Yakka 1.3 2894 5,0/9  
10. Priessnitz 2.0 2400 5,0/9  
11. Ice4 v6 JA 3054 5,0/9  
12. Euwe 2.1.0 JA 2400 5,0/9  
13. Lux 4.2 2677 5,0/9  
14. Wize 1.0 JA 3014 4,5/9  
15. MadChess 3.3 2825 4,5/9  
16. Seawall 20250322 JA 2960 4,5/9  
17 Colossus 2025b 2834 4,5/9  
18 Smaug 2.2.1 JA 2935 4,5/9  
19 GOOB 1.8.9 JA 3084 4,5/9  
20 Apotheosis 4.01 2856 4,0/9  
21 Cyrano 0.6b17 JA 2400 4,0/9  
22 Bobcat 8.0 JA 2782 4,0/9  
23 Ares 2.3.14 2611 4,0/9  
24 Lishex 1.1.1 2760 4,0/9  
25 Aurora 1.26.0 2370 3,5/9  
26 Javelin 3.0.0 2400 3,5/9  
27 Catacomb 1 2711 3,5/9  
28 Shallow v5 2910 3,0/9  
29 LizardBrain 2400 3,0/9  
30 Rustic Knight 1.0.0 2400 2,5/9  
31 OpenTal 1.1 JA 2913 2,0/9  
32 CeeChess 1.4 2376 0,0/9  
         
E-04 Season 07/2025 Rating Score note
1 Tarnished 4.0 2400 8,5/9  
2 Meltdown 1.10 2400 6,5/9  
3 Rodent IV 0.33 JA 2680 6,5/9  
4 Prelude Fusion 2.0 2400 6.0/9  
5. Admete 1.8.0 2645 6.0/9  
6. Clovis III 2885 6.0/9  
7. Dog 3.4 2400 5,5/9  
8. LazySMP 9.0 2400 5,5/9  
9. Queen 4.05 2607 5,0/9  
10. Drosophila 1.6 JA 2785 5,0/9  
11. Raven 1.30 2689 5,0/9  
12. Shen Yu 2.0.1 2613 5,0/9  
13. Jackal 1.2.0 2400 5,0/9  
14. Luna 2.0.0 2698 4,5/9  
15. Simplex 0.9.8 JA 2400 4,5/9  
16. Mephisto Gideon Professional 2400 4,5/9  
17 Barbarossa 0.7.0 2609 4,5/9  
18 Fornax 4.0 JA 2633 4,5/9  
19 Chessplusplus 1.2.0 2359 4,0/9  
20 Belette 3.0.0 2400 4,0/9  
21 Sentinel 2.0 JA 2400 4,0/9  
22 Albatros 1.0.0 2454 4,0/9  
23 Floyd 0.9 JA 2380 3,5/9  
24 Oxidation 0.7.2 2076 3,5/9  
25 Throttle 3.2.2 2400 3,5/9  
26 Toad 3.0.0 JA 2400 3,0/9  
27 Stellar 1.4 2400 3,0/9  
28 Freda 1.1 JA 2185 3,0/9  
29 Cadabra 2.1.0 JA 2400 3,0/9  
30 Camel 1.6.0 2168 2,5/9  
31 ChessMaster 2023 2546 2,5/9  
32 Raphael 1.8.0 2400 2,5/9  
         
E-05 Season 07/2025 Rating Score note
1 Beef 0.3.6 JA 2400 8.0/9  
2 PZChessBot 4.0 2400 8.0/9  
3 Hardfiskur rev.98eab6f JA 2400 6,5/9  
4 Shallow Guess 0.4.0 2400 6,5/9  
5. Crab 4.6.3 JA 2400 6.0/9  
6. Fortuna 1.0 JA 2400 6.0/9  
7. Halcyon 1 JA 2410 5,5/9  
8. Tunguska 1.1 Dev.e003c68 JA 2628 5,0/9  
9. Axon 0.3 2440 5,0/9  
10. StoneChess 2024-09-13 2349 5,0/9  
11. Eubos 4.1 JA 2493 5,0/9  
12. Sloth 2.1 2351 5,0/9  
13. Byte-knight 3.0.0 2400 4,5/9  
14. Omelette 1.0 2400 4,5/9  
15. Shuffle 5.2.0 JA 2450 4,5/9  
16. Habu 1.0 JA 2400 4,5/9  
17 Lunarr 2.1.1 2453 4,5/9  
18 Nectar 0.2.2 2400 4,5/9  
19 Zagreus 5.0 2451 4,5/9  
20 Seagull 1.0 JA 2960 4,0/9  
21 Ifrit 4.03 JA 2639 4,0/9  
22 Schneckbert 3.0 JA 2400 4,0/9  
23 Peripheral 1.1.3 2314 4,0/9  
24 Kobol 1.1 2400 4,0/9  
25 Polonium 0.1.5 JA 2400 3,5/9  
26 SSEHC 1.0 2400 3,5/9  
27 Neuromancer 1.5 2196 3,5/9  
28 Dragonrose 0.26 2600 3,0/9  
29 Dodecahedron 0.0.12 JA 2400 2,5/9  
30 Chesslib 0.0.3 Dev.1c05597 JA 2400 2,0/9  
31 Motsog 22 2400 2,0/9  
32 Koedem 1.1.2 JA 2552 1,0/9  
     
E-06 Season 07/2025 Rating Score note
1 Weiawaga 6.0 2400 7,5/9  
2 Quirky 2.0 2400 7,5/9  
3 Defenchess 2.3 JA 3310 7.0/9  
4 Bitbit 1.5 2400 6,5/9  
5. Zahak 10.0 JA 3330 6.0/9  
6. LimboBot NNUE 0.1 dev.bf92d06 JA 2400 6.0/9  
7. Jackychess 25.04 JA 2400 6.0/9  
8. Laser 1.8 JA 3295 5,5/9  
9. Jence 1.0.2 2285 5,5/9  
10. Chess-3 2.0 JA 2400 5,0/9  
11. Turbulence 0.0.8 JA 2400 5,0/9  
12. Emerald 0.4.1 2400 5,0/9  
13. Goldfish 1.13.0 JA 2400 4,5/9  
14. Kingfisher Dev.bb31a9a JA 2400 4,5/9  
15. Kopyto 5df55e1 lub JA 2400 4,5/9  
16. Dual 0.2.6 2400 4,5/9  
17 Baislicka 1.0 Dev.2dae4e5 JA 2400 4,0/9  
18 100-Elo-Chess-Engine-1 2400 4,0/9  
19 GitChess 1.0 2400 4,0/9  
20 Baryonyx 0.1.13 2400 4,0/9  
21 Chers 0.8.0 2036 4,0/9  
22 Magog 1.0 2400 4,0/9  
23 Piglet 1.3.6 1855 3,5/9  
24 Maello 0.1 Dev.2442bb4 JA 2400 3,5/9  
25 Radiance 4.1 2400 3,5/9  
26 Topas 1.3.3 JA 2400 3,5/9  
27 Purple Panda 19 2400 3,5/9  
28 Rust Chess Engine 0.1.7 2154 3,5/9  
29 Pioneer 0.3.2 JA 2400 3,0/9  
30 Eques 1.0.0 2400 3,0/9  
31 Clozza 1.0 JA 2400 2,0/9  
32 Mcu-max 1.0.6 1233 0,5/9  
     
E-07 Season 07/2025 Rating Score note
1 Iris 2.0 2400 7.0/9  
2 Exocet 0.4.0 2400 6,5/9  
3 Panda 1.1 JA 2400 6,5/9  
4 Cataphract 1.1 2400 6,5/9  
5. Senpai 2.0 JA 3167 6,5/9  
6. Aku 2025.7.9 3182 6,5/9  
7. Minke 2.0.0 2400 6.0/9  
8. Tomcat 1.0 JA 2400 6.0/9  
9. Axolotl 1.9 JA 2400 5,5/9  
10. Knightcap 3.8 JA 2400 5,5/9  
11. Olithink 5.11.9 JA 2845 5,0/9  
12. Eleanor 2.0 2400 5,0/9  
13. Jinx 1.0 JA 2415 5,0/9  
14. Mufasa 0.2.1 JA 2400 5,0/9  
15. RapCpw 2400 4,5/9  
16. Prophet 5.1 2370 4,5/9  
17 Lozza 7.0 JA 2400 4,5/9  
18 BlueBetaFish dev-b3b8603 JA 2400 4,5/9  
19 Milky 0.2.0 2400 4,0/9  
20 Alpaca 0.2.6 2400 4,0/9  
21 Natto Dev5aaa JA 2400 4,0/9  
22 Mochi 20250308 JA 2400 4,0/9  
23 Kairuku 1.0.1 JA 2400 4,0/9  
24 Tortoise 1.0 2400 3,5/9  
25 Chessatron 1.3.14159 2400 3,5/9  
26 Reggz 0.6.0 2400 3,5/9  
27 Catto 0.12.5 2316 3,5/9  
28 Goldfinger dev-ba5 JA 2400 3,0/9  
29 Eggnog 6 dev-1cc JA 2400 3,0/9  
30 Melsh Bot 1.0 JA 2400 2,5/9  
31 Fatalii 0.9.0 JA *crash 2385 1,0/9  
32 Rudim 1.4 JA *crash 2400 0,0/9  
     
E-08 Season 07/2025 Rating Score note
1 Ynode 0215 2400 7,5/9  
2 Lunar 0.4.0 2400 7,5/9  
3 Stallion GB Edition 2400 7.0/9  
4 Maelstrom 3.3.0 3337 6.0/9  
5. Cwtch 3 2400 6.0/9  
6. Pluto 1.0.1 2400 5,5/9  
7. Turncoat 1.0 JA 2400 5,0/9  
8. Invictus r391 JA 2793 5,0/9  
9. Spike 1.4.1 2782 5,0/9  
10. Bit-Genie 9.24 JA 2400 5,0/9  
11. Viking R2 2400 5,0/9  
12. Pounce 2.1.3 2400 5,0/9  
13. Juggernaut 1.01 2400 5,0/9  
14. Adeon 1.2.1 2400 5,0/9  
15. Rhetoric 1.4.3 2872 4,5/9  
16. Tuna 1.0.0 JA 2400 4,5/9  
17 Truncator 1.0 2400 4,0/9  
18 Scam 0.4 JA 2400 4,0/9  
19 DoctorB 1.2.1 JA 2400 4,0/9  
20 Shadowfax 1.0.1 JA 2400 4,0/9  
21 Indus Dragon 0.1 JA 2400 4,0/9  
22 RustyKnight 2.0 2400 4,0/9  
23 Carlito 0.1.0 JA 2400 3,5/9  
24 ArchDuchess 1.0 JA 2400 3,0/9  
25 Belofte 2.1.9 JA 2221 3,0/9  
26 Mihansolo bot 5.0.0 2400 2,5/9  
27 Nibble 01r131 2400 1,5/9  
28 Tcheran 5.1 2242 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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