The 09/2026 season of the Chess Engine League (CEDR) - completed!

 

The 09/2026 season of the Chess Engine League (CEDR) - completed!

A total of 237 engines took part in the CEDR Chess Engine League (TOP-64) as well as the qualifying rounds!

TOP-64 League, strongest chess engines CEDR
1 League	Season 09/2026	Rating	Score	note
1.	Stockfish 20260825 Ivec	3880	35.0
2.	Obsidian 16.15 SE	3814	34.5
3.	PlentyChess 8.0.0	3827	32.0
4.	Alexandria 9.0.0 JA	3826	32.0
5.	Reckless 0.10.0-dev-7300f044	3846	31.5
6.	Tarnished 6.0	3739	30.5
7.	Dragon 3.3	3788	30.0
8.	Viridithas 20 JA	3794	30.0
9.	Astra 7.0 JA	3770	30.0
10.	Halogen 16.8.0	3812	30.0
11.	Berserk 14 JA	3783	29.5
12.	Caissa 1.26	3792	28.0
13	Lc0 0.32.1	3790	27.5
14.	Raphael 4.3.0 dev-acd050b	3776	27.5	relegation
15.	PZChessBot 7.1	3742	26.5	relegation
16.	Horsie 1.1.0	3765	25.5	relegation
2 League	Season 09/2026	Rating	Score	note
1.	Cinder 0.6.1	3806	35.0	promotion
2.	Quanticade-Phoenix dev-260810	3757	34.0	promotion
3.	Stormphrax 8.0.0	3799	33.5	promotion
4.	Torch-4 1.01	3827	33.5
5.	Pawnocchio 2.0.1	3808	32.5
6.	Integral 7 JA	3816	30.5
7.	Lizard 11.2	3742	30.5
8.	Clover 9.1	3766	30.5
9.	Motor 0.9.0	3749	29.5
10.	Igel 3.7.0	3709	29.0
11.	RubiChess 01082026	3766	28.5
12.	Titan 1.1.0 JA	3707	28.0
13.	Renegade 1.3.1	3744	27.5
14.	Uralochka 3.42a	3733	27.5	relegation
15.	Seer 2.8.0 JA	3704	26.5	relegation
16.	Booot 7.4	3710	23.5	relegation
3 League	Season 09/2026	CEDR	Score	note
1.	Devre 7.0 JA	3765	40.0	promotion
2.	Icarus 1.1.1	3729	36.0	promotion
3.	Starzix 6.1 JA	3763	34.0	promotion
4.	Arasan 26	3697	33.0
5.	Zangdar 7 JA	3696	33.0
6.	Revenge 4.0	3687	31.0
7.	Velvet 9.0.0 dev-7 JA	3717	30.5
8.	Spaghet-BologNNese 1.0	3666	30.0
9.	Cataphract 1.5.1	3652	30.0
10.	Rebel 16.5	3696	29.5
11.	Clarity 8.0.0 JA	3674	28.0
12.	Akimbo 1.1.0 JA	3688	27.5
13.	Koivisto 9.20 JA	3670	26.0
14.	Rofchade 3.1	3674	25.5	relegation
15.	Peacekeeper 3.01 JA	3656	23.5	relegation
16.	Elixir 3.0 JA	3631	22.5	relegation
4 League	Season 09/2026	CEDR	Score	note
1	Triumviratus 6.0	3804	44.5	promotion
2	Minke 7.0.0	3756	39.5	promotion
3	Prune 4.0.1 JA	3715	34.5	promotion
4	Chess System Tal 2.07	3678	34.5
5	Hypersion 3.2	3703	33.5
6	Bread 4.0.0	3644	32.0
7	Equisetum 1.30 JA	3664	30.0
8	Ynode 0234	3564	28.5
9	Dragon free	3660	28.0
10	Minic 3.46 JA	3549	27.5
11	Fire 10	3630	27.5
12	Pawn 4.0.4 JA	3570	27.0
13	Altair 7.2.1 JA	3645	27.0	relegation
14	Slowchess 2.9	3595	25.5	relegation
15	Texel 1.13a4 JA	3602	23.0	relegation
16	Sirius 9.0	3550	17.5	relegation
Challenger Group A
A	Season 09/2026	Rating	Score	note
1	Winter 5.0 JA	3540	6.5	promotion
2	Patricia 5.1	3514	6.0	promotion
3	Tucano 12.17 JA	3524	5.5	promotion
4	Wasp 7.16	3525	5.5	promotion
5.	Avalanche 4.0.0	3551	5.5
6.	Lambergar 1.5	3534	5.5
7.	Stallion GB Edition	3491	5.0
8.	Willow 4.0	3608	5.0
9.	MrBob 1.3.0 JA	3374	5.0
10.	Lunar 0.4.0	3572	5.0
11.	Sapling 1.2.7	3478	5.0
12.	Smallbrain 7.0 JA	3476	5.0
13.	Stash 37.10 JA	3482	5.0
14.	Monty dev-20260512	3573	5.0
15.	Weiawaga 6.0	3508	4.5
16	Panda 2.0 JA	3637	4.5
17	Illumina 3.0 JA	3431	4.5
18	Superultra 2.1 JA	3558	4.0
19	Arcanum 2.8	3478	4.0
20	Leorik 3.2	3468	4.0
21	Rice 8.0	3504	4.0
22	Shadow 0.3	3501	4.0
23	Chessnix 1.4	3431	4.0
24	Marvin 6.3.0 JA	3501	4.0
25	Jackal 2.0.0	3417	3.5	relegation
26	Expositor 5 JA	3495	3.5	relegation
27	Grail 2.0.1	3461	3.5	relegation
28	Midnight 9 JA	3476	3.0	relegation
29	Myrddin 0.96 JA	3441	3.0	relegation
30	Frozenight 7.0.0 JA	3381	2.5	relegation
Challenger Group B
B	Season 09/2026	Rating	Score	note
1	Turbulence 0.0.8 JA	3566	7.0	promotion
2	Quirky 3.0 JA	3342	7.0	promotion
3	Petrel 4.0 JA	3542	6.5	promotion
4	Cwtch 6	3355	6.0	promotion
5.	Cheng4 0.49	3452	5.5	promotion
6.	Weiss 2.1 JA	3464	5.0	promotion
7.	Nalwald ab11891 JA	3390	5.0
8.	Perseus 1.1 JA	3418	5.0
9.	Bitbit 1.7 JA	3451	4.5
10.	Anduril 0.1 dev.ea5a JA	3343	4.5
11.	Solo 2.2.0 JA	3417	4.5
12.	Counter 5.5	3408	4.5
13.	RukChess 4.2.0 JA	3363	4.5
14.	Lynx 1.11.0	3334	4.5
15.	Kociolek 2.1 JA	3287	4.5
16	EveAnn 6.0	3367	4.5
17	Tunguska 2.2	3364	4.5
18	Maelstrom 3.3.0	3319	4.5
19	Svart 6 b2c7255 JA	3266	4.5
20	Maestro 1.2.1 JA	3316	4.0
21	Laser 1.8 JA	3295	4.0
22	Gargantua 2.1	3511	4.0
23	Defenchess 2.3 JA	3314	4.0
24	Pedantic 2.1.0	3398	4.0
25	Lozza 10	3291	4.0	relegation
26	Bit-Genie 9.24 JA	3260	3.0	relegation
27	Sturddle 2.6.0	3319	3.0	relegation
28	Caligula 7.0	3397	3.0	relegation
29	Jet 1.2	3264	3.0	relegation
30	Cadie 2.1 JA	3299	2.5	relegation
Challenger Group C
C	Season 09/2026	Rating	Score	note
1	Wreckless 2.0.0	3864	7.5	promotion
2	Hobbes 3.0	3795	7.0	promotion
3	Gaia 4.3.0	3681	6.0	promotion
4	Coda 0.9.4	3818	6.0	promotion
5.	Tcheran 13.0	3702	5.0	promotion
6.	Ruthorin 1.9.9	3642	5.0	promotion
7.	Vajolet2 3.2	3294	5.0
8.	Zahak 10.0 JA	3362	5.0
9.	Thrawn 3.2	3503	5.0
10.	Askaig 20260811	3477	5.0
11.	Monolith 3	3271	5.0
12.	Fizbo 2 JA	3207	5.0
13.	Publius 1.1	3300	5.0
14.	Invictus r391 JA	3143	5.0
15.	Rose 1.0.0 JA	3600	4.5
16	Danasah 9.1 JA	3282	4.5
17	Schneckbert 3.0 JA	3408	4.5
18	Yakka 1.5	3259	4.5
19	Drofa 4.1.1 JA	3303	4.5
20	Odonata 1.1.0	3364	4.0
21	Aku 2025.7.9	3176	4.0
22	Xiphos 0.6.1 JA	3369	4.0
23	Olithink 5.11.9 JA	3170	3.5
24	Pounce 3.0.0	3163	3.5
25	Wize 1.0 JA	3074	3.5	relegation
26	Beef 0.3.6 JA	3206	3.5	relegation
27	ChessBrainVB 4.10	3190	3.0	relegation
28	Admete 1.9.0 JA	3191	3.0	relegation
29	Throne 0.2	3141	3.0	relegation
30	4ku 5.1	3048	1.0	relegation
Challenger Group D
D	Season 09/2026	Rating	Score	note
1	JustBot 0.4.0	3689	6.5	promotion
2	Clockwork dev-20260826	3526	6.5	promotion
3	Rodent V 1.2	3517	6.0	promotion
4	Zigqueen 6.0.0	3632	6.0	promotion
5.	Bagatur.cpp 1.0	3503	6.0	promotion
6.	Ursus 1.1.0	3587	5.5	promotion
7.	Sable 3.0.0	3396	5.5
8.	Onyx 2.0	3385	5.5
9.	Gyatso 1.5.0	3304	5.5
10.	Ember 1.3.0	3242	5.5
11.	Rusty-rival 1.0.61	3235	5.0
12.	Priessnitz 2.0.1 JA	3279	5.0
13.	Gecko 0.40.1	3203	4.5
14.	Demolito 2025-12-16	3198	4.5
15.	Noggin 2.1	3169	4.5
16	Ceibo 1.10	3149	4.5
17	Potential-unlocked JA	3342	4.5
18	Flounder 0.5.0.2	3212	4.5
19	Dog 4.1	3234	4.0
20	Sentinel 2.0 JA	3058	4.0
21	Eleanor 4.1 JA	3570	4.0
22	Orion 1.1	3209	3.5
23	Pluto 1.0.1	2984	3.5
24	Byte-knight 4.0.0	2961	3.5
25	Kobra 2.1	3140	3.5	relegation
26	KnightX 4.92	2961	3.0	relegation
27	Cheese 3.3.0 JA	2930	3.0	relegation
28	Lux 5.0	2849	3.0	relegation
29	Ratsu 2.1.0	2918	2.5	relegation
30	MadChess 3.4	2857	2.0	relegation
Challenger Group E
E	Season 09/2026	Rating	Score	note
1	Allie 0.8	3741	8.0	promotion
2	Malika HCE 1.821	3478	7.0	promotion
3	MORS 0.1.0	3556	6.5	promotion
4	Fable 5.1	2400	6.0	promotion
5.	Zevra 2.7	2857	6.0	promotion
6.	Opus 5	2400	6.0	promotion
7.	CeylonDemon 2.0	3264	6.0
8.	Theoria 0.3.1	3357	6.0
9.	Crustik 0.3.0	2400	6.0
10.	Sykora 4.0.0	3538	5.5
11.	Pea 9.1	3401	5.5
12.	Ravager 2	2400	5.5
13.	GOOB 2.1	3084	5.5
14.	Akkad 0.52b JA	3145	5.5
15.	Chal 2.0.0	2734	5.5
16	Colossus 2026a	2833	5.5
17	Roxie 0.6.4	2748	5.0
18	Princhess 0.22.0 JA	3351	5.0
19	Mittens CEDR 08.2026v2	3300	5.0
20	Jackychess 25.12 JA	2990	5.0
21	Bobcat 8.0 JA	3016	5.0
22	ECE 26.8	2400	4.5
23	Dirty Urusel	3001	4.5	winboard
24	Spike 1.4.2	2887	4.5
25	Tomcat 1.0 JA	2978	4.5
26	Dual 0.4.2	3241	4.5
27	Truncator 1.0	2996	4.5
28	Chess-3 4.0	3059	4.5
29	Seawall 20250322 JA	2932	4.5
30	Phalanx XXV UCI Bugfix JA	2400	4.5
31	Dorky 5.0	2796	4.5
32	Ply 1.0.0 JA	2400	4.5
33	MagicTree 3.3	3035	4.0
34	Revolver 2.0 JA	3049	4.0
35	Verychess 0.8.0	2803	4.0
36	Euphron 0.46	2400	4.0
37	Drosophila 1.6 JA	2734	4.0
38	Fatalii 0.10.1	2764	4.0
39	Sonnet 5	2400	3.5
40	Luna Chess-Engine (LCE) 2.5.0 JA	2924	3.5
41	CeeChess 2.2 JA	2823	3.5
42	Luminex 5.15.0	2472	3.5
43	Brutus 8.05 JA	2400	3.5	winboard
44	Arche 0.4.2	2400	3.5
45	BibiChess 0.5 UCI	2400	3.5
46	Scoria 4.4.9 JA	2940	3.0
47	MissingPawn	2400	3.0
48	Wowl 1.3.8 JA	2348	3.0
49	Apollo 1.2.1 JA	2193	3.0
50	Russell 1.2	2400	2.0
51	Zzzzzz-cecp 260828	2535	1.0
52	Moustique 0.4.5	2400	0.0