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Chess engine: Stockfish 21073115 (Windows and Linux)

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Stockfish - UCI chess engine, compiled by VoyagerOne Rating JCER=3559 Timestamp: 1627738159 CMH Pruning Tweak replace CounterMovePruneThreshold by a depth dependent threshold STC: LLR: 2.94 (-2.94,2.94) <-0.50,2.50> Total: 35512 W: 2718 L: 2552 D: 30242 Elo +1.62 Ptnml(0-2): 66, 2138, 13194, 2280, 78 https://tests.stockfishchess.org/tests/view/6104442fafad2da4f4ae3b94 LTC: LLR: 2.96 (-2.94,2.94) <0.50,3.50> Total: 36536 W: 1150 L: 1019 D: 34367 Elo +1.25 Ptnml(0-2): 10, 920, 16278, 1049, 11 https://tests.stockfishchess.org/tests/view/6104b033afad2da4f4ae3bbc Bench: 5848718 Stockfish 14073115 NNUE download Stockfish 14073115 for Linux  

Seer 2.2.0 wins JCER - Amateur League Group E4 edition 48, 2021.07.29 - 2021.07.31

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Promotion to group E3: Seer 2.2.0, Clover 2.4, Novice 3.01 . Relegation to group E5: Goldfish 1.13.0, Jacksprat 1.0, Sapeli 2.0 . Temp 3'+3" HP Pavilion, i5-1035G1, 8GB RAM GUI  Arena 3.5.1 Book  Perfect 2021 All JCER games 01.07.2021 Table:  Scid vs PC JCER League Tournament:   240 games

Chess engine: Cfish 2021-07-29_Sopel97

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CFish - UCI chess engine, Rating JCER=3513 "CFish, a port of Stockfish written in plain C by Ronald de Man, first published on GitHub in July 2016. Possibly inspired by the asmFish project to speed up Stockfish using a programming language closer to the machine, the purpose of CFish is to explore possible optimization issues of C versus C++ compilers" [Chess Programming Wiki]. Cfish 2021-07-29_Sopel97- download

Donna 4.1 wins JCER Amateur League Group E3 edition 48, 2021.07.26 - 2021.07.28

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Promotion to group E2: Donna 4.1, Loki 3.5.0, NoC 4.20 . Relegation to group E4: Lozza 2021-01-12, Vafra 3.0.1, Tunguska 1.1 . Temp 3'+3" HP Pavilion, i5-1035G1, 8GB RAM GUI  Arena 3.5.1 Book  Perfect 2021 All JCER games 01.07.2021 Table:  Scid vs PC JCER League Tournament:   240 games Amateur and new engines E1 Edition 48 Rating JCER Score Qualification 1 Tomcat 1.0 3157 45.0 / 60 promotion 2 Crafty 25.6 3093 40.5 / 60 3 Drofa 3.0.0 3130 40.0 / 60 4 Cheese 2.2 3062 39.5 / 60 5 Zurichess Nidwalden 3094 36.0 / 60 6 Atlas 3.91 3103 35.5 / 60 7 Olithink 5.10.0 3120 34.0 / 60 8 ProDeo 3.1 3079 27.0 / 60 9 Devel 3.8.4 3001 27.0 / 60 10 Ruydos 1.1.11 3038 26.0 / 60 1

Chess engine: Mayhem 5.1 and NNUE (Windows and Linux)

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Mayhem - UCI chess engine , Author:  Toni Helminen Rating JCER=3132 v.5.1 FRC castling bug fixed Some fixes and speedups (+16 ELO) Mayhem 5.1 download

Chess engine: Lynx 0.2.0 (Windows, Mac, Linux)

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Lynx  ⚠️ Project under development ⚠️ Lynx it's written in C# (.NET 6). UCI protocol is needed. --- Lynx 0.2.0 download

Cfish 120721 wins JCER - Fritz New Engines Tournament, 2021.07.25 - 2021.07.27

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  Temp 3'+3" Lenovo Z710, i7-4710MG, 8GB RAM GUI  Fritz 15 Book  Perfect 2021 All JCER games 01.07.2021 Table:  Scid vs PC JCER Test Tournament:   182 games

Chess engine: Raubfisch X46b and GTZ25b NNUE

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Raubfisch is an engine derived from Stockfish and Torpedo 1.1 XJR (private engine by Frank Karl Werner and Max Fehler).  Rating JCER - 3503  (3st place) *********************************************************************************************** Warning : The network is not embedded, you must add the NNUE network with the engine in the same file. Otherwise, the engine will not work! *********************************************************************************************** Raubfisch X46b and GTZ25b NNUE - download

Chess engine: Stockfish 21072607 (Windows and Linux)

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Stockfish - UCI chess engine, compiled by SFisGOD Rating JCER=3559 Timestamp: 1627536913 Update default net to nn-56a5f1c4173a.nnue SPSA 1: https://tests.stockfishchess.org/tests/view/60fd24efd8a6b65b2f3a796e Parameters: A total of 256 net biases were tuned (hidden layer 2) New best values: Half of the changes from the tuning run New net: nn-5992d3ba79f3.nnue SPSA 2: https://tests.stockfishchess.org/tests/view/60fec7d6d8a6b65b2f3a7aa2 Parameters: A total of 128 net biases were tuned (hidden layer 1) New best values: Half of the changes from the tuning run New net: nn-56a5f1c4173a.nnue STC: LLR: 2.94 (-2.94,2.94) <-0.50,2.50> Total: 140392 W: 10863 L: 10578 D: 118951 Elo +0.71 Ptnml(0-2): 347, 8754, 51718, 9021, 356 https://tests.stockfishchess.org/tests/view/610037e396b86d98abf6a79e LTC: LLR: 2.95 (-2.94,2.94) <0.50,3.50> Total: 14216 W: 454 L: 355 D: 13407 Elo +2.42 Ptnml(0-2): 4, 323, 6356, 420, 5 Closes #3633 Bench: 4801359 Stockfish 14072607 NNUE download Stockfish

Stash 31.0 wins 3 League JCER edition 48, 2021.07.24 - 2021.07.26

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  Promotion to 2 League: Stash 31.0, Weiss 1.4, Ice4 853 .  Relegation to 4 League: Protector 1.9.0, SmarThink 1.98 .  Temp 3'+3" Intel Core i7 7,9 GB GUI  Arena 3.5.1 Book  Perfect 2021 All JCER games 01.07.2021 Table created  Scid vs PC JCER League Tournament:   210 games League – TOP 64 1 League Edition 48 Rating JCER Score Qualification 1. Fisherov 0.98c 3542 48.5 / 60 2. SugaR Al 2.20 3524 43.5 / 60 3. Stockfish 14 3549 43.0 / 60 4. Raubfisch X45f 3503 42.5 / 60 5. Dragon 2.0 3488 42.5 / 60 6. Fire 8NN1 3387 39.5 / 60 7. Ethereal 12.75 NNUE 3491 39.0 / 60 8. Igel 3.0.5 3394 31.0 / 60 9. Pedone 3.1 3381 23.5 / 60 10. Slow Chess 2.6 3325 23.0 / 60 11.

Chess engine for Android: Fire 8NN Monte Carlo

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Fire - UCI chess engine, Rating JCER=3387 (10 place) New feature: MCTS-UCT (Monte Carlo Tree Search w/ Upper Confidence Bounds Applied to Trees) w/ UCI Option Fire 8NN Monte Carlo download

Chess engine: Seer 2.2.0

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Seer - UCI chess engine  Author: Connor McMonigle  Rating JCER=3256 (35 place) This release adds roughly 70 to 100 Elo in self play depending on the testing conditions. The majority of this increase in strength can be attributed to an improved network generated via self play training using the previous "retrograde learning" network used in versions 2.0.0 and 2.1.0 as a base. The specific self play code used can be found under the selfplay branch of the "seer-training" repository. The remaining 20 or so Elo originates from search patches. Seer 2.2.0 download

Chess engine: Odonata 0.3.26 (Windows and Linux)

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Description from the author:  My lockdown hobby was writing a chess engine, and learning Python and Rust in the process. Currently Odonata is available to play as a bot on Lichess, though Odonata only plays blitz and bullet games right now, as she's running on my media centre, and Netflix stutters if she's thinking too hard... I started Decemeber 2020. Python and Rust are very different from Java, which I had programmed maybe 10 years previous. Certainly my first efforts at Rust are not very clean, clever or idiomatic, but the code improves as I revist areas to build improvements. I'm aware that this is now yet another chess engine, with yet another set of Python bindings. In part this is because the project was intended as a learning exercise, but also there did not appear to be a Python native extension available. v.0.3.26: 180 Elo improvement from 0.3.17 Futility pruning Null move pruning Multi-threading (still experimental) Command-line switches for benchmarking and per

Fisherov 0.98c wins JCER - Fritz 15 Tournament, 2021.07.23 - 2021.07.26

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  Temp 3'+3" Lenovo Z710, i7-4710MG, 8GB RAM GUI Fritz 15 Book  Perfect 2021 All JCER games 01.07.2021 Table:  Scid vs PC JCER Test Tournament:  364 games