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Defenchess 2.3 wins Amateur League CEDR group A1, edition 03/2024, 2024.05.03
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The highest amateur group of chess engines was definitely won by Defenchess 2.3. The following companies were also promoted to the TOP-64 of CEDR chess engines: Reckless 0.6.0, Drofa 4.1.0 and Combusken 2.0.0.
The last four engines are relegated to the lower A2 group, with the Jet 1.2 engine blocked by Windows as containing a virus.

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JigSaw 5.5i wins Strong Engines Tournament, by CEDR 02.05.2024
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The tournament of powerful chess engines was narrowly won by JigSaw 5.5i. Right behind it are five engines that scored only half a point less: Deep Blue-20240315-killer, HypnoS 030424, SF-PRO 01/05/2024, Stockfish 20240330 Ivec and Stockfish 20240501.

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Strong Engines Tournament (Tests by Jörn Gronemann, Heide, 2024.05.04 Time: 3'+3")
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Two "official" engines: CorChess 20240426 and Stockfish 16.1 scored 75 points each, but Corchess did not lose a single game!
In third place is Kookaburra 2.00.
The test is very valuable - over 1,300 games!

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Saturn 1.3 wins Amateur League CEDR group A2 edition 03/2024, 2024.05.04
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The A2 amateur group was won by the Saturn 1.3 engine, which appeared only two months ago!
The following engines also received promotion for the A1 group: Nalwald 18, GreKo 2021.08 NNUE and Toga IV.
Mantissa 3.7.2 had problems starting in the Banksia GUI

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Expositor 4WR02 wins Amateur League CEDR group A3 edition 03/2024, 05.05.2024
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The Expositor 4WR02 engine won Group A3 with a huge advantage. The following engines also advanced: Cadie 1.7 JA, Zangdar 2.27.08 and Sirius 6.0, but their loss to the leader was very large.
The last four engines are relegated to the lower group, except that Tantabus 2.0.0 and MadChess 3.2 Beta had problems with working in the Banksia GUI.

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Demolito 2023-11-04 wins Amateur League CEDR group A4 edition 03/2024, 2024.05.06
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Demolito 2023-11-04 got a fantastic result of 37.5 points. of 38 games.
The following engines were promoted to group A3: Gargantua 1.0, Odonata 0.8.0 and Seawall 20231015.
The last four engines are dropped from this group, with MinimalChess 0.6 and Rodent NNUE 1.0 having problems with running in the Banksia GUI.

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Ceibo 1.0 wins Amateur League CEDR group A5 edition 03/2024, 2024.05.07
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Four engines: Ceibo 1.0, ice4 v4, Lishex 1.1.1 and Catacomb 1 were promoted to group A4. Compared to the previous edition, there are no new engine versions in this group.
The last four engines experienced a decline, and two of them, Bienchen 1.0 and FoxSEE 8.2, had bugs in the Banksia GUI.

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Clover 6.1.19 wins New Amateur Engines Test, by CEDR 2024.05.02-07
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Clover 6.1.19 won a major amateur chess engine tournament for an older computer. Many new versions starred in it. Next to the already known engines, the Saturn 1.3 performed well. This is a completely new product and it already sounds very strong.

Let's include ranking gains or losses in the table, they may be a bit misleading, because engines that we are testing for the first time and that have not played at least 250 games have an initial ranking of 2400.

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Strong Engines Tournament by CEDR 03-06.05.2024
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Another large tournament (almost 1200 games) was won by SF PB 280424 and AI 28.0 engines.
By half a point AbbyStein 2.8 and Deep Blue-20240315 chess engines scored less.

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Alexander 1.3 wins Arena Amateur Engines Test by CEDR 03-06.05.2024
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This is another tournament of new versions of amateur chess engines. The best result was the Alexander 1.3 engine, but it is worth noting the good results of the next three engines in the table: Winter 3.07 JA, Weiss 2.1 JA and Cheng 4.48.

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Deep Blue-20240315 wins Strong Engines Tournament (Tests by Jörn Gronemann, Heide, 2024.05.07 Time: 3'+3")
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This is another good result of the Deep Blue-20240315 engine. Undefeated and +5.
The official Stockfish 16.1 version is in the middle of the table at 50% - time to release Stockfish 17!😁

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Kobra 1.1 wins Amateur League CEDR group A6 edition 03/2024, 07-08.05.2024
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The Kobra 1.1 engine achieved a fantastic result of 38 points out of 38 games. Congratulations to the author!
The following engines were also promoted: Queen 4.05, Shuffle 5.2.0 and Arcanum 2.0.

The last four engines in the table dropped, including two: CDrill 2000 and Kimbo 1.0.0, which failed to run (errors) in the Banksia GUI.

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PlentyChess 1.0.0 wins Amateur League CEDR group A7 edition 03/2024
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PlentyChess 1.0.0 achieved a very good result (37 points from 38 games).
The following engines were also promoted: Equisetum 1.0, Clarity 6.0.0 and Alexander 1.3.

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AbbyStein 2.8 wins Strong Engines Tournament by CEDR, 06-08.05.2024
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The AbbyStein v2.8 engine achieved a very good result. Next are CorChess 20240502 and Raid 3.6 TR.

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Titan 1.0.0 wins Amateur League CEDR group A8 edition 03/2024, 2024.05.09
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The new Titan 1.0.0 and Yakka 1.0 engines were promoted to a higher group. The game of the Titan engine looks particularly good, who knows, maybe this chess engine will enter the TOP-64?
The Floyd 0.9 and Aurora 1.11.4 engines were also promoted to the A7 group.