Promising engines 3000+ ELO not Stockfish derivatives

[AlexChess]

Slow Chess Blitz by Jonathan Kreuzer (USA) ELO 2455
https://www.3dkingdoms.com/chess/slow.htm

About 2.5:
Using Slow Chess : Own GUI or Winboard / UCI
Update History
2.5+ use neural nets for evaluation in all stages of the game. (2.4 had only endgame neural nets.)
slow64-avx.exe is fastest
slow64-sse.exe is for older CPUs that don't support AVX2, it will have slower nps.
(With neural net eval hardware popcount is no longer a measurable speed up, so slow64-sse has no hardware pop also.)
Features:
Strong play. For a detailed estimate check these major ratings lists : CCRL, (FRC), (4-core), CEGT, (25'), FGRL, (10'), SPCC, FCP
Analyze mode to suggest the best move for any position, or moves in multi-variation move
Winboard and UCI support, so you can use it outside its own GUI. more
Multi-threaded search support for all interfaces (defaults off. Search->threads in own GUI)
Chess 960 support in own GUI and UCI mode. (also known as Fischer Random Chess)
Adjustable search options, hash table, pondering.
Difficulty Level by time per move, number of ply, or number of nodes
PGN support for saving / loading games.
Copy / Paste text transcripts, positions
Game transcript box, and take back/ redo move buttons for playback of games.
Player Clocks & set timelimit option.
Dev Menu options : display perft, evaluation, tt-entry, right-click on piece for individual eval, and more

[AlexChess]

Fire8 NN Montecarlo by Norman Schmidt (Germany) ELO 3500


https://github.com/FireFather/fire

My friend Norm helped me releasing also a popcount build for my system, and it's very strong despite the fact that is a little slow! Thanks also to my other friend IPMAN that proved that was possible (was only for AVX and BM2)

https://www.chessprogramming.org/Fire

Fire, (Firebird, Fire xTreme)
an UCI compliant chess engine by Norman Schmidt [2], until version 3.0 derived from IvanHoe and the Ippolit series of programs with some help of Milos Stanisavljevic. Initially called Firebird, and later renamed to Fire due to a trademark naming conflict [3], it was released as open source, Fire licensed under the GNU GPL. The sources were later closed with Windows executables available for download for recent Intel processors [4]. Fire features magic bitboards, it can be configured with more than 70 UCI options, and applies a SMP parallel search. Since April 2021 with Fire 8.1, the program is open source again [5].

[AlexChess]

Laser by Jeffrey An and Michael An ELO 3287 (USA)

https://github.com/jeffreyan11/laser-chess-engine
https://www.chessprogramming.org/Laser

[AlexChess]

Fitzbo 2.0 by Youri Matiounine ELO 3100 (France)

https://sites.google.com/site/fizbochessengine/
https://www.chessprogramming.org/Fizbo

Fizbo is an original chess engine written by Youri Matiounine.

It's not recent, but still strong enough to enter my SuperBlitz. I hope it will be released a new version soon.

There are 4 kinds of the executable:

1. file "fizbo2x64" is the primary engine, and will only run under Windows and requires CPU with "popcount" instruction.
2. file "fizbo2x64_no_pc" does not require "popcount" CPU instruction and can be run on older computers.
3. file "fizbo2x64_no_pc_linux" also does not require Windows virtual memory allocation functions and can be
run on Linux
4. file "fizbo2x64_bmi2" is for modern CPUs with BMI2 instruction set. Specifically, the engine uses instructions PEXT and BLSR. If also uses various AVX2 instructions.

Changes in version 2, released December 21, 2017
1. minor bug fixes: fixed a bug that occasionally crashed the engine, mostly running on multiple CPU cores
2. minor changes to search and evaluation.
3. changes to parallel search, improving performance mostly on >4 CPU cores.
Expected playing strength is approximately 20-30 ELO higher than Fizbo 1.9

Estimated strength with 1 CPU/4 CPU is 3,200/3,280 ELO respectively (#5 on CCRL 4/40 list, #6 on CCRL 40/40 list).

[AlexChess]

Combusten by Marcin Henryk Bartkowiak ELO 3100 (Poland)

Marcin kindly compiled for me also a macOS M1 native build and its strong and very fast!

https://github.com/mhib/combusken
https://lichess.org/@/combuskengine

[Raphexon]

Fitzbo 2.0 by Youri Matiounine ELO 3100 (France)

https://sites.google.com/site/fizbochessengine/
https://www.chessprogramming.org/Fizbo

Fizbo is an original chess engine written by Youri Matiounine.

It's not recent, but still strong enough to enter my SuperBlitz. I hope it will be released a new version soon.

There are 4 kinds of the executable:

1. file "fizbo2x64" is the primary engine, and will only run under Windows and requires CPU with "popcount" instruction.
2. file "fizbo2x64_no_pc" does not require "popcount" CPU instruction and can be run on older computers.
3. file "fizbo2x64_no_pc_linux" also does not require Windows virtual memory allocation functions and can be
run on Linux
4. file "fizbo2x64_bmi2" is for modern CPUs with BMI2 instruction set. Specifically, the engine uses instructions PEXT and BLSR. If also uses various AVX2 instructions.

Changes in version 2, released December 21, 2017
1. minor bug fixes: fixed a bug that occasionally crashed the engine, mostly running on multiple CPU cores
2. minor changes to search and evaluation.
3. changes to parallel search, improving performance mostly on >4 CPU cores.
Expected playing strength is approximately 20-30 ELO higher than Fizbo 1.9

Estimated strength with 1 CPU/4 CPU is 3,200/3,280 ELO respectively (#5 on CCRL 4/40 list, #6 on CCRL 40/40 list).

Fizbo is abondoned. There won't be a new one.
The author did release its source code though: https://github.com/MoonstoneLight/Fizbo-Chess

[AlexChess]

Fitzbo 2.0 by Youri Matiounine ELO 3100 (France)

https://sites.google.com/site/fizbochessengine/
https://www.chessprogramming.org/Fizbo

Fizbo is an original chess engine written by Youri Matiounine.

It's not recent, but still strong enough to enter my SuperBlitz. I hope it will be released a new version soon.

There are 4 kinds of the executable:

1. file "fizbo2x64" is the primary engine, and will only run under Windows and requires CPU with "popcount" instruction.
2. file "fizbo2x64_no_pc" does not require "popcount" CPU instruction and can be run on older computers.
3. file "fizbo2x64_no_pc_linux" also does not require Windows virtual memory allocation functions and can be
run on Linux
4. file "fizbo2x64_bmi2" is for modern CPUs with BMI2 instruction set. Specifically, the engine uses instructions PEXT and BLSR. If also uses various AVX2 instructions.

Changes in version 2, released December 21, 2017
1. minor bug fixes: fixed a bug that occasionally crashed the engine, mostly running on multiple CPU cores
2. minor changes to search and evaluation.
3. changes to parallel search, improving performance mostly on >4 CPU cores.
Expected playing strength is approximately 20-30 ELO higher than Fizbo 1.9

Estimated strength with 1 CPU/4 CPU is 3,200/3,280 ELO respectively (#5 on CCRL 4/40 list, #6 on CCRL 40/40 list).

Fizbo is abondoned. There won't be a new one.
The author did release its source code though: https://github.com/MoonstoneLight/Fizbo-Chess

Thanks for the info!
What's a pity!!! Like Xiphos 0.6.1 I fear, too.

[AlexChess]

Combusten by Marcin Henryk Bartkowiak ELO 3100 (Poland)

Marcin kindly compiled for me also a macOS M1 native build and its strong and very fast!

https://github.com/mhib/combusken
https://lichess.org/@/combuskengine

Combusten 1.99_dev WinARM64 by Marcin Henryk Bartkowiak has 3211 ELO!!!

All PGN games of this engine, played on my SuperBlitz:
https://onedrive.live.com/?cid=B0F79706 ... 9&o=OneUp

[AlexChess]

Combusten 1.99_dev WinARM64 by Marcin Henryk Bartkowiak has 3211 ELO!!!

All PGN games of this engine, played on my SuperBlitz:
https://onedrive.live.com/?cid=B0F79706 ... 9&o=OneUp

CombuskeN 1.9.9_dev compiled by Marcin for macOS M1 is my faster engine!

[AlexChess]

Zahak 6.2 macOS M1 by Amanj Sherwany ELO 3138 (Kurdistan)

While the Windows 10 x64 build is 3000 ELO, the macOS M1 native version is much faster and is 3138 ELO on my tests!!

Zahak on Talkchess:
forum3/viewtopic.php?p=904397#p904414
Github: https://github.com/amanjpro/zahak/releases/tag/6.2