JustBot 0.6.0 dev-e721ea62 wins Challenger Group B, edition 11/2026

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Group B of the Chess Engine League qualifiers has concluded. JustBot 0.6.0 dev-e721ea62 emerged as the winner and secured promotion to Group A. Also earning promotion were the engines that finished from 2nd to 6th place: Thrawn 3.2, Zigqueen 6.5.0, Rodent V 1.2, Ruthorin 1.9.9, and Panda 2.0 JA. Meanwhile, the engines that finished in 25th to 30th place were relegated to Group C.

CEDR Chess Engine League - more.

CEDR 903.628 games download (until 30.06.2026)
All Games 129.244 CEDR from 01.11.2026 download.
💾 Tournament games: 165 download
💻 Asus Zenbook, AMD Ryzen 9 6900HX, RAM 32,0 GB  🖬 GUI -GUI - Myracle, book:avt-2026b
#chessenginesdiary Country - Poland, City - Malbork  🕓 Time 3'+3"


Pl ENGINE Points % Bu W-L-D note
1 JustBot 0.6.0 dev-e721ea62 8.5/11 77.3 69.0 +6-0=5 promotion
2 Thrawn 3.2 8.0/11 72.7 69.0 +5-0=6 promotion
3 Zigqueen 6.5.0 8.0/11 72.7 68.5 +5-0=6 promotion
4 Rodent V 1.2 7.0/11 63.6 70.5 +4-1=6 promotion
5 Ruthorin 1.9.9 6.5/11 59.1 68.5 +3-1=7 promotion
6 Panda 2.0 JA 6.5/11 59.1 65.5 +5-3=3 promotion
7 Clockwork 20261025 6.0/11 54.5 67.0 +3-2=6
8 Ursus 1.1.0 6.0/11 54.5 64.0 +2-1=8
9 Expositor 5 JA 6.0/11 54.5 59.0 +3-2=6
10 Shadow 0.3 6.0/11 54.5 58.5 +3-2=6
11 Vajolet2 3.2.0 6.0/11 54.5 58.0 +4-3=4
12 Rose 1.0.0 JA 5.5/11 50.0 67.0 +3-3=5
13 Stash 37.10 JA 5.5/11 50.0 66.5 +3-3=5 [1 time loss]
14 Anduril 0.1 JA 5.5/11 50.0 65.0 +3-3=5
15 Gargantua 2.1 5.5/11 50.0 62.5 +3-3=5
16 Pedantic 2.1.0 5.5/11 50.0 58.0 +3-3=5
17 Cheng 4.49 JA 5.5/11 50.0 56.5 +3-3=5
18 Perseus 1.1 JA 5.0/11 45.5 60.5 +1-2=8
19 Yakka 1.6 5.0/11 45.5 59.0 +0-1=10
20 Counter 5.5 5.0/11 45.5 57.0 +1-2=8
21 Solo 2.2.0 JA 5.0/11 45.5 54.0 +1-2=8
22 Maelstrom 3.3.0 5.0/11 45.5 52.5 +1-2=8
23 MrBob 1.3.0 JA 5.0/11 45.5 50.0 +1-2=8
24 Chessnix 1.4 4.5/11 40.9 63.5 +1-3=7
25 Schneckbert 3.0 JA 4.5/11 40.9 58.5 +2-4=5 relegation
26 Midnight 9 JA 4.5/11 40.9 54.0 +1-3=7 relegation
27 Nalwald ab11891 JA 4.0/11 36.4 56.0 +2-5=4 relegation
28 Tunguska 2.2 4.0/11 36.4 50.5 +1-4=6 relegation
29 Odonata 1.1.0 3.5/11 31.8 52.0 +1-5=5 relegation
30 Defenchess 2.3 JA 2.5/11 22.7 54.5 +1-7=3 relegation

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