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My programming style is very low-level, so I never do things like objects, and even structs are rare. Pieces are just represented by small integers, usually unsigned char. The 'properties' are then simply stored in arrays, indexed by the piece number. (I prefer that over grouping them in structs, w...

Is Sapeli an ANDROID engine? Peter Yes. I played w/ compilers and managed to compile ARM v7 of Sapeli 1.54 for modern Android devices. I needed to make a few changes in code. Compiles no problem. sapeli154-arm: https://github.com/SamuraiDangyo/Sapeli/tree/binaries/bin I compiled also for Windows 64...

Tried different Sapeli playing levels on PyChess. As I tried that GUI. Not very smooth playing strength transition. But definitely works. Sapeli 1.53 Level 1 ( Not Random Mover ) vs PyChess.py. Chess960. Loss. [Event "Local Event"] [Site "Local Site"] [Date "2019.10.14"] [Round "1"] [White "Sapeli 1...

OS on this comp: NAME="Ubuntu" VERSION="18.04.3 LTS (Bionic Beaver)" ID=ubuntu ID_LIKE=debian PRETTY_NAME="Ubuntu 18.04.3 LTS" VERSION_ID="18.04" HOME_URL="https://www.ubuntu.com/" SUPPORT_URL="https://help.ubuntu.com/" BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/" PRIVACY_POLICY_URL="https://...

Hello: Skipper gives castling rights depending on rook number. So the position below might give a problem. Skipper gives perft(4) = 265703 [d] rrrrkr1r/rr1rr3/8/8/8/8/8/6KR w k - 0 1 rrrrkr1r/rr1rr3/8/8/8/8/8/6KR w k - 0 1 Results by JetChess 1.0.0.0: perft(1) = 8 perft(2) = 388 per...

Great work!
I tried to play on it Sapeli. After installing tons of stuff I got into this.

Board presentation is the first choice when starting to write chess engine from scratch. How pieces are encoded. Some uses just INTs for moves. From/To/Castle is encoded in 4 bytes. If you can debug that thing perfectly it is fast. In Sapeli I use a 184 bytes board as a "move".

Sapeli 1.53 Source code: https://github.com/SamuraiDangyo/Sapeli Release: https://github.com/SamuraiDangyo/Sapeli/releases/tag/v1.53 - Somehow I forgot knight outposts in earlier versions. - Simplifications. - Added check extensions. - PST are now const. Nice underpromotion in the end. :D In 1 minut...

After I installed the latest Mint on my laptop. I noticed a huge boost in search speed ( +1 mnps ). Movegenerator ( +10 mnps ). I remember Sapeli searching 3.8 - 4.2 mnps on this laptop. Now Sapeli is searching almost 6 mnps. I used gcc7.2 earlier So the speed up is coming from OS. Notice a big boos...

With Sapeli -bench means benching the chess engine. -benchm benches mgen and the the same nodes are expented. Valgrind report of Sapeli 1.48. No leaks are possible. Not surprising as I have written Sapeli in the most simplest way. ... --9434-- REDIR: 0x5174c70 (libc.so.6:__strcpy_chk) redirected to ...