Icarus 1.1 JA wins Challenger Group B, edition 06/2026

 

The Challenger Group B tournament, part of the chess engine league qualifiers, has concluded. Icarus 1.1 JA emerged victorious. The engines that finished 2nd through 5th also advanced: Bread 3.1.0 JA, Counter 5.5, Lynx 1.11.0, and Frozenight 7.0.0 JA.

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Tech table:

Engine	KN/move	NPS	dep/mov	time/mov	mov/gam	time/gam	fails
Bread 3.1.0 JA	21886	4474928	26.4	4.9	75.2	367.6
Cadie 2.1 JA	6236	1233534	32.3	5.1	79.5	402.1
Chessnix 1.4	6729	1343272	33.4	5.0	82.5	413.5
Counter 5.5	19604	3784331	24.2	5.2	70.5	365.4	1
Defenchess 2.3 JA	21175	4467655	31.1	4.7	95.8	454.0
Drofa 4.1.1 JA	20837	4544119	30.4	4.6	97.4	446.7
Frozenight 7.0.0 JA	26069	5427707	32.0	4.8	81.6	392.0
Gaia 4.1.3	6473	1357009	35.1	4.8	88.3	421.3
Hypersion 3.1	7566	1744959	23.5	4.3	100.4	435.4	4
Icarus 1.1 JA	14899	2598698	37.2	5.7	62.0	355.5
Jet 1.2	6847	1310282	21.1	5.2	60.4	315.7
Kociolek 2.1 JA	4498	952855	20.9	4.7	71.2	336.2
Laser 1.8 JA	18215	3826497	37.1	4.8	79.5	378.4
Lynx 1.11.0	11659	2236766	25.4	5.2	74.5	388.3
Maestro 1.2.1 JA	4755	1331706	23.5	3.6	73.0	260.7
Monolith 3	15621	3308663	37.6	4.7	82.3	388.5
Mr Bob 1.3.0 JA	11063	2536567	30.8	4.4	84.6	368.9
Odonata 1.1.0	3609	809241	24.5	4.5	86.9	387.6
Pedantic 2.1.0	3068	693358	30.4	4.4	97.5	431.5
Petrel 3.5 JA	12410	2899915	38.0	4.3	87.0	372.1	5
RukChess 4.2.0 JA	9188	2122867	23.7	4.3	73.2	316.7	1
Sturddle 2.5.0	10874	2293207	32.6	4.7	79.0	374.6
Svart 6 JA	15794	3317938	31.5	4.8	84.3	401.0	1
Tunguska 2.1	13245	2665546	27.3	5.0	82.2	408.3
Vajolet2 3.1.0	17339	3433045	30.7	5.1	84.0	424.0