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Big thanks to Ferdy! Yeah my RubyShogi was full of bugs. Horse moves were buggy. This pawn drop checkmate was wrong. Drops were wrong... Hopefully my numbers are now correct. I can finally start polishing RubyShogi. ~~~ suite( 4 ) ~~~ [ round: 1 / 3 ] [ fen: 7lk/9/8S/9/9/9/9/7L1/8K[P] w 0 1 ] 0: 1 |...

Congrats!

My engine RubyShogi seems to get startpos perft numbers correct per se: http://tonyjh.com/chess/technical/ I wrote a random position generator to see whether RubyShogi gets all perft numbers correct? At least RubyShogi plays under Xboard w/o issues. ~~~ suite( 5 ) ~~~ 0: 1 | 0.0s | 1 nps | ok 1: 30 ...

I've been developing my Shogi engine for a while. Also Xiangqi engine is ready too. But I will release that later. I couldn't fit this Shogi engine into my Shuriken variant engine. So I made a new engine. - Xboard protocol - Sapeli like mgen https://i.imgur.com/b03iBFc.jpg Install: gem install RubyS...

A very modest update. Sapeli 1.42 + Support for clang++ + fixes / just polishing code tho could be 1 ELO stronger... Source code: https://github.com/SamuraiDangyo/Sapeli/tree/1.42 Release: https://github.com/SamuraiDangyo/Sapeli/releases/tag/1.42 Now 4 compilers can compile Sapeli: gcc -bench : = no...

Sapeli 1.42 random playouts. draw / 1_000_000 games sapeli -fen "k5b1/8/8/1p1p1p1p/1PpP1P1P/2P5/8/7K w - - 0 1" -analyze 1000000 [ Score: 0 - 0 - 987000 [0.50] 987000 ] [ Score: 0 - 0 - 988000 [0.50] 988000 ] [ Score: 0 - 0 - 989000 [0.50] 989000 ] [ Score: 0 - 0 - 990000 [0.50] 990000 ] [ Score: 0 ...

Looking at that 743 lines search I decided to split Sapeli's Seach() in smaller chunks. No other difference to 1.40 than splittings the Search(). Not a release since 1.41 might contain bugs. I don't like bloated functions so 1.41 is the way to go now on. https://github.com/SamuraiDangyo/Sapeli/tree/...

Sapeli 1.40 numbers: sapeli -fen "8/ppp3p1/8/8/3p4/5Q2/1ppp2K1/brk4n w - - 11 7" -perft 8 ~~~ Perft( 8 ) ~~~ depth 0 nodes 1 mnps 0.000 time 0.000 depth 1 nodes 27 mnps 0.000 time 0.000 depth 2 nodes 390 mnps 0.000 time 0.000 depth 3 nodes 9354 mnps 9.354 time 0.001 depth 4 nodes 134167 mnps 19.167 ...

Regarding lines. Stockfish's search 743 lines.

starts -> line 560: https://github.com/official-stockfish/S ... h.cpp#L560
ends -> line: 1303: https://github.com/official-stockfish/S ... .cpp#L1303

Thanks to all reporting bugs! This was actually a bad bug. I wrote this tactical loop for simplicity not for speed. Still it got out of array bounds. Removed those infected 1.3x releases. + other small fixes Source code: https://github.com/SamuraiDangyo/Sapeli/tree/1.40 Release: https://github.com/S...