Chess Engines Diary

  Casanchess -  UCI compatible chess engine written in C++. The NNUE evaluation is trained on millions of positions from auto-games and randomly generated FENs, evaluated with its own classical evaluation upto depth 7. Author: Carlos Sanchez Mayordomo  Rating CEDR=3029 CasanChess what's new? Try to fix a crash appearing at CCRL tournaments. Fix: Windows build moved from gcc to clang. MinGW-gcc sometimes generates aligned AVX instructions for unaligned memory, leading to crashes in some environments. As a side effect, clang-cl build is +20% NPS faster on my test machine. Fix: update Fathom library, fixing issues with C++20 compilations and memory misalignments. The engine behavior and strength is exactly as v1.1 (aside from Windows binary speed increase). CasanChess 1.1.2 - download

  Coda 0.9.4 took first place in the latest elite chess engine tournament, with PlentyChess 8.0.0 JA coming in second and Caissa 1.26 JA finishing third. The competition featured a total of 30 engines. CEDR 903.628 games download (30.06.2026) All Games 85.0785 CEDR from 01.09.2026 download . 🕒🕒Time 3'+3"   Tournament download with 870 games   #chessenginesdiary GPU NVIDIA  RTX 3060 ti. GUI-Myracle, For Every Engine only 1 CPU and 512 Hashtables, Book - 3 mv book,  6TBs. P Engine Score (Tie) +/-/= 1: Coda 0.9.4 37.0 / 58 990.00 (+17 -1 =40) 2: PlentyChess 8.0.0_JA 36.0 / 58 978.25 (+15 -1 =42) 3: Caissa 1.26_JA AVX2 35.5 / 58 960.50 (+14 -1 =43) 4: Viridithas 20.0.0 35.5 / 58 944.75 (+15 -2...

  Ferrous is a brute-force calculating chess engine that plays in a local environment. The way it works is it looks through positions by generating best moves for both sides in its "mind" and determines which one is the best for it. Ferrous works on bitboards, which means it has room for massive optimizations and potential to become better than all human chess players on Earth. It's current limitation is depth 9, beyond which Ferrous cannot find a move in reasonable time. Author: Sava Ferrous what's new? better move ordering less aggressive history decay more granular late move reduction Comparison to Ferrous v0.5.0 240 games match results: 121 wins, 75 losses, 44 draw, which translates to ~67.4 elo gain Ferrous 0.5.1 download

  Qapla - UCI chess engine Author: Volker Böhm ( Mangar2) What's new? Qapla 0.4.0 brings two things: A good 100 Elo stronger than 0.3.2. Syzygy tablebase support. Set SyzygyPath to the directory holding the .rtbw/.rtbz files. SyzygyProbeDepth and SyzygyProbeLimit control how deep and for how many pieces the  engine probes. Binaries are PGO builds, tested on all three platforms with the compliance suite of qapla-engine-tester: Qapla0.4.0-win-x64.exe - Windows, 64 bit Qapla0.4.0-linux-x64 - Linux, 64 bit, statically linked Qapla0.4.0-macos-arm64 - macOS on Apple Silicon, new in this release All three need a CPU with popcount support, which any x86 processor of the last decade has. Jim Ablett compiles: Qapla 0.4.0 JA download

We’ve just released another batch of new chess engine versions. Their playing strength is still unknown as initial testing is in progress, and the results will be available on our website. Pasteque is a free UCI chess engine from Ukraine. It is not a complete chess program: it needs a UCI-compatible GUI to be used. Author: Volodymyr Shcherbyna Pasteque 0.0.0 download   mirror Surveyor - UCI Chess Engine written in C++. Author: Amberg12 Surveyor-ONE.1 download     mirror Zoomies is a multi-threaded UCI chess engine with NNUE evaluation written with C#. Author: Angelo Wolff Zoomies 5.2 download     mirror Wakwak a chess engine capable of playing the DuckChess variant, hopefully well. Author: Silverrzz Wakwak 0.14.0 download   

  Revolution 6.40-150926 came out on top in the latest tournament showcasing updated chess engines, with Stockfish dev-20260922 taking second and DON dev-20260922 finishing third. The event also featured several brand-new engines, some of which will be vying for spots in the Chess Engine League (TOP-64) qualifiers. CEDR 903.628 games download (until 30.06.2026) All Games 85.078 CEDR from 01.09.2026 download . 💾 Tournament games : 506 download 💻 Asus Zenbook, AMD Ryzen 9 6900HX, RAM 32,0 GB   🖬 GUI - Myracle, book:avt-2026b #chessenginesdiary Country - Poland, City - Malbork   🕓 Time 3'+3" P Engine CEDR Score (Tie) Chg +/-/= 1: Revolution 6.40-150926 3853 36.5 / 44 686.25 +0 (+29 -0 =15) 2: Stockfish dev-20260922 3849 36.0 / 44 669.25 -4 (+28 -0 =16) 3: DON dev-20260922 3840 35.5 / 44 653.75 -9 (+27 -0 =17) 4: S...