Wukong JS - chess engine with UCI support, own GUI and public API

[maksimKorzh]

Hi guys

I'd like to expose in public the first results regarding my new project:
Pure JavaScript Chess engine that has own GUI, can play play versus other engines via UCI (using nodejs)
and has a small public API (used in both interfaces) so it can be embedded to third party websites.

Play online (faster in Chrome, slower in Firefox): https://maksimkorzh.github.io/wukongJS/wukong.html
Source code: https://github.com/maksimKorzh/wukongJS

I also have a few words to say to those of you who know me.
You know like I've been doing lots of stuff recently, but quite often used
cheats and hacks to promote my youtube channel. None of that stuff with this project.
I'm doing it 100% for myself - no more NNUE copypasting, no more CPW snippets copypasting.
I've been working on the look of source code the most, so PLEASE have a look at the source code,
especially generateMoves() and isSquareAttacked() functions - want to get your feedback regarding
refactoring I'm proud of)))

Generally it would most likely be interesting for programmers, because the most of work I put into it
relies within the architecture and code itself.

Regarding playing style and strength - after 5+ years of chess programming I must admit that I'm a noob
and probably be that until the dying day - that's the reason of considering RELATIVE strength improvement
instead of absolute - I would probably never master NNUE but I want to make this engine play in an agressive
tactical style like Fritz 5-12 did. That's the major approach regarding the further development.

This is just a random success, for now it losses to TSCP all the games
[pgn]
[Event "Computer chess game"]
[Site "maksim-Inspiron-3582"]
[Date "2020.12.18"]
[Round "?"]
[White "TSCP"]
[Black "WukongJS"]
[Result "0-1"]
[BlackElo "2000"]
[ECO "A25"]
[Opening "English"]
[Time "20:51:16"]
[Variation "Closed, 3.g3 Nf6"]
[WhiteElo "1723"]
[TimeControl "120+1"]
[Termination "normal"]
[PlyCount "68"]
[WhiteType "program"]
[BlackType "program"]

1. c4 e5 {(e7-e5 Nb1-c3 Nb8-c6 Ng1-f3 Bf8-c5 e2-e4) -0.00/6 4} 2. g3 Nf6
{(Ng8-f6 Nb1-c3 Bf8-c5 Ng1-f3 Nb8-c6 Bf1-g2) +0.20/6 4} 3. Nc3 {(b1c3 b8c6
e2e4 f8b4 g1e2 e8g8 d2d3) -0.51/7 4} Nc6 {(Nb8-c6 Bf1-g2 Bf8-c5 e2-e4 O-O
Ng1-f3) +0.25/6 4} 4. e4 {(g1f3 f8b4 c3d5 e5e4 d5b4 c6b4) -0.72/6 3} Bc5
{(Bf8-c5 Bf1-g2 d7-d6 Qd1-e2 O-O Ng1-f3) +0.20/6 4} 5. d3 {(d2d3 e8g8 c1g5
d7d6 g1f3 c8e6 g5f6 d8f6) -0.77/6 3} O-O {(O-O Bc1-e3 Qd8-e7 Ng1-f3 Rf8-e8)
+0.40/5 4} 6. Bg5 {(c1g5 d7d6 c3d5 c5b4 d5b4 c6b4 g1f3) -0.52/6 3} d6
{(d7-d6 Ng1-f3 h7-h6 Bg5xf6 Qd8xf6 Bf1-g2) +0.25/6 4} 7. Nf3 {(f1g2 c5b4
g1e2 b4c3 e2c3 c8e6 g5f6 d8f6) -0.53/5 3} h6 {(h7-h6 Bg5-e3 Bc5xe3 f2xe3
Bc8-e6) +0.30/5 4} 8. Bxf6 {(g5f6 d8f6 f1g2 c8e6 e1g1 c6d4) -0.27/6 3} gxf6
{(g7xf6 Bf1-g2 Bc8-g4 O-O Nc6-d4 Nc3-d5) +0.10/6 4} 9. h3 {(f3h4 c6d4 d1d2
h6h5 e1c1) +0.36/5 3} Nd4 {(Nc6-d4 Bf1-g2 Bc8-e6 Qd1-d2 h6-h5) +0.20/5 4}
10. Bg2 {(f1g2 c8e6 d1d2 h6h5 e1c1 c7c6) +0.52/6 3} f5 {(f6-f5 Qd1-d2
Nd4xf3+ Bg2xf3 Qd8-f6 Nc3-d5) -0.00/5 3} 11. Nxd4 {(d1d2 c7c6 e1c1 d8f6
f3d4 c5d4) +0.56/6 3} exd4 {(e5xd4 Nc3-e2 Qd8-f6 e4xf5 Qf6xf5 O-O) +0.30/6
3} 12. Ne2 {(c3e2 f5e4 g2e4 a7a5 a2a3 f8e8 f2f4) +0.33/7 3} Qf6 {(Qd8-f6
O-O Bc8-e6 Qd1-c2 f5xe4 d3xe4) +0.30/6 3} 13. Qa4 {(d1a4 f5e4 g2e4 f8d8
a4b3 c7c6) +0.40/6 3} fxe4 {(f5xe4 Bg2xe4 Rf8-d8 Qa4-b3 c7-c6) +0.70/5 3}
14. Bxe4 {(g2e4 c8f5 f2f3 f5e4 f3e4 f8e8) +0.32/6 3} c6 {(c7-c6 Ne2-f4
Rf8-e8 O-O-O Re8-e5) +0.60/5 3} 15. b4 {(b2b4 c5b6 b4b5 c6c5 f2f4) +0.62/5
3} Bb6 {(Bc5-b6 Ne2-f4 Rf8-e8 O-O-O Re8-e5) +0.50/5 3} 16. b5 {(b4b5 c6c5
e2f4 f8e8 e1c1 f6e7) +0.54/6 2} Bf5 {(Bc8-f5 f2-f3 Bf5xe4 f3xe4 Qf6-f3
Ke1-d2) +0.60/6 3} 17. Bxf5 {(e4f5 f6f5 b5c6 f5f3 e1c1 b7c6 h1e1) +0.32/7
2} Qxf5 {(Qf6xf5 Ra1-d1 Qf5-f3 Rh1-h2 a7-a6 b5xc6) +0.70/6 3} 18. Qb3
{(b5c6 f5f3 e1g1 b7c6 e2f4 a8e8) +0.17/6 2} Qf3 {(Qf5-f3 Rh1-h2 Rf8-e8
Qb3-c2 Re8-e5) +1.05/5 3} 19. Rh2 {(h1h2 f8e8 b3d1 d6d5 b5c6 b7c6 a1c1 d5c4
c1c4) -0.18/7 2} cxb5 {(c6xb5 c4xb5 Rf8-e8 Qb3-c2 Re8-e5) +1.05/5 3} 20.
cxb5 {(c4b5 f8e8 b3d1 a8c8 a2a4 d6d5) -0.06/6 2} Rfe8 {(Rf8-e8 Qb3-d1
Re8-e5 Qd1-d2 Re5xb5) +1.25/5 3} 21. Qd1 {(b3d1 e8e3 d1d2 e3d3 d2h6 d6d5)
-0.57/6 2} Re3 {(Re8-e3 f2xe3 Bb6-a5+ Ne2-c3 Ba5xc3+ Rh2-d2 Bc3xd2+)
+1.55/5 3} 22. Rc1 {(a1c1 e3d3 d1c2 d6d5 e2f4 a8e8) -1.83/6 2} Rxd3
{(Re3xd3 Qd1-c2 Ra8-e8 Rc1-d1 Rd3-c3) +2.45/5 2} 23. Qa4 {(d1a4 d6d5 c1c2
a8e8 h3h4 d3c3) -2.02/6 2} Re8 {(Ra8-e8 Rc1-c2 d6-d5 Qa4-b4 Re8-e4) +3.05/5
2} 24. Rc2 {(c1c2 d3a3 a4c4 d4d3 c2d2 e8e2 d2e2 f3e2) -4.71/6 2} Ra3
{(Rd3-a3 Qa4-c4 d4-d3 Rc2-d2 Re8xe2+) +5.25/5 2} 25. Qc4 {(a4c4 d4d3 e1f1
d6d5 c4c8 e8c8 c2c8) -6.19/6 2} d5 {(d6-d5 Qc4-c8 Bb6-a5+ Ke1-f1 Re8xc8
Rc2xc8+) +7.50/5 2} 26. Qc8 {(c4c8 e8c8 c2c8 g8g7 e2c1 b6a5 e1f1 f3f5 c8c5
a3g3 c5d5 f5d5 f2g3 d5b5) -6.50/7 2} Rxc8 {(Re8xc8 Rc2xc8+ Kg8-g7 Rc8-c2
Qf3-d3 Rc2-b2 Kg7-g8) +7.65/6 2} 27. Rxc8+ {(c2c8 g8g7 e1f1 d4d3 e2g1 f3d1
f1g2 a3a2 g1f3 b6f2) -8.16/7 2} Kg7 {(Kg8-g7 Ne2-f4 Ra3xa2 Rc8-b8 Ra2-a1+
Ke1-d2 Ra1-a2+) +8.45/5 2} 28. Nxd4 {(e1f1 d4d3 e2g1 f3d1 f1g2 a3a2 g1f3
b6f2) -8.16/6 2} Bxd4 {(Bb6xd4 Rc8-c7 Ra3xa2 Rc7xb7 Bd4xf2+) +9.65/5 2} 29.
Rc2 {(c8c2 f3e4 e1d1 e4d3 d1e1 d3c2 b5b6 a3a2 b6a7 d4a7) -13.64/6 2} Qe4+
{(Qf3-e4+ Ke1-d1 Qe4-d3+ Rc2-d2 Qd3-f1+ Kd1-c2 Ra3xa2+ Kc2-b3 Ra2xd2)
+15.00/5 2} 30. Kd1 {(e1d1 e4d3 d1e1 d3c2 h3h4 a3a2 g3g4 d4f2) -14.62/5 2}
Qd3+ {(Qe4-d3+ Kd1-e1 Qd3xc2 h3-h4 Ra3xa2 Rh2-h3) +16.05/5 2} 31. Ke1
{(d1e1 d3c2 e1f1 c2b1 f1g2 a3a2 h2h1 b1b5) -15.34/5 2} Qxc2 {(Qd3xc2 h3-h4
Qc2-b1+ Ke1-e2 Ra3xa2+ Ke2-f3 Qb1xb5) +16.25/5 2} 32. Kf1 {(e1f1 a3f3 f1e1
d4f2 h2f2 c2f2 e1d1 f3g3) -17.03/6 2} Rxa2 {(Ra3xa2 h3-h4 Qc2-d3+ Kf1-g1
Qd3xg3+ Rh2-g2 Bd4xf2+) +17.05/5 2} 33. h4 {(h3h4 c2e4 g3g4 a2a1) -99.96/5
0} Qe4 {+M2/5 2} 34. Kg1 {(f1g1 a2a1) -99.98/3 0} Ra1# {+M1/5 2} 0-1
[/pgn]

[maksimKorzh]

I've separated UCI module from engine so from now on engine can be used as a library.
I've added some API usage examples, pretty basic at the moment but already usable.

API function declarations: https://github.com/maksimKorzh/wukongJS
API usage examples: https://github.com/maksimKorzh/wukongJS ... ain/API.MD

Works for both browser and nodejs only the init is slightly different.