If you are interested....

[Sylwy]

The true hierarchy of chess engines written in Python. There are 12 more (all for the 2nd league). In total 42 engines that can withstand the demands of a tournament. Chessidle-1.4.0_x64 is a true masterpiece. 100% Python!

Python_1st_League_2026 after 958 games (TC=4'+2"):

[Sylwy]

My tournament PYTHON_1st_League_2026 now has 31 participants. I also introduced an engine (from Vietnam) with an interesting architecture: KiyEngine-5.0.0_x64-avx2. It has mixed code: Python (mostly in this version) and Rust. The evaluation is based on GGUF (BitNet 1.58-bit TransformerNN). The situation in the tournament after 1023 games is:





For example: a beautiful game of KiyEngine-5.0.0_x64-avx2 against a Polish engine - AllayaChess_1.6:

[pgn]
[Event "PYTHON_1st_League_2026"]
[Site "ISR 3"]
[Date "2026.05.13"]
[Round "3"]
[White "AllayaChess"]
[Black "KiyEngine-5.0.0_x64-avx2"]
[Result "0-1"]
[BlackElo "2200"]
[ECO "B07"]
[Opening "Pirc"]
[Time "19:10:05"]
[Variation "150 Attack, 4.Be3 Bg7 5.Qd2"]
[WhiteElo "2200"]
[TimeControl "240+2"]
[Termination "normal"]
[PlyCount "58"]
[WhiteType "program"]
[BlackType "program"]

1. e4 g6 2. d4 Nf6 3. Nc3 {(Nb1-c3 d7-d5 e4-e5 Nf6-e4 Nc3xe4 d5xe4) +0.87/6
9} d6 4. Be3 Bg7 {(Bf8-g7) -0.45/14 9} 5. Qd2 Nc6 {(Nb8-c6) -0.35/15 9} 6.
Nf3 {(Ng1-f3 O-O O-O-O Bc8-e6 d4-d5) +0.85/5 9} O-O {(O-O) -0.45/15 9} 7.
Bc4 {(Bf1-c4 e7-e6 Be3-g5 d6-d5 e4xd5) +1.01/5 9} Kh8 {(Kg8-h8) -0.45/14 8}
8. d5 {(d4-d5 Nc6-a5 Bc4-b5 c7-c6 Bb5-d3) +1.56/5 9} Ne5 {(Nc6-e5) -0.25/16
8} 9. Nxe5 {(Nf3xe5 d6xe5 O-O Bc8-g4 h2-h3 Bg4-d7 a2-a3) +1.39/7 8} dxe5
{(d6xe5) -0.30/16 8} 10. O-O-O {(O-O-O Bc8-g4 f2-f3 Bg4-d7 Qd2-f2 a7-a6)
+1.35/6 8} Ng4 {(Nf6-g4) -0.20/17 8} 11. Bg5 {(Be3-g5 Bc8-d7 h2-h3 Ng4-f6
Qd2-e3 Kh8-g8) +1.32/6 8} f6 {(f7-f6) -0.25/16 8} 12. Be3 {(Bg5-e3 Ng4xe3
Qd2xe3 Bc8-g4 Bc4-e2 Bg4-d7 a2-a3 Kh8-g8) +0.97/8 8} Nxe3 {(Ng4xe3)
-0.35/16 7} 13. Qxe3 {(Qd2xe3 Bc8-g4 Bc4-e2 Bg4-d7 Be2-b5 f6-f5 e4xf5
Bd7xf5) +1.01/8 8} f5 {(f6-f5) -0.45/17 7} 14. Bb5 {(Bc4-b5 f5-f4 Qe3-f3
Bc8-d7 Bb5xd7) +0.80/5 7} fxe4 {(f5xe4) -0.25/16 7} 15. Nxe4 {(Nc3xe4 a7-a6
Bb5-e2 Bc8-f5 Ne4-c5 Ra8-b8) +0.80/6 5} Rf4 {(Rf8-f4) -0.20/17 7} 16. g3
{(g2-g3 Rf4-f8 Ne4-c5 Qd8-d6 Rh1-e1) +1.09/5 7} Rf8 {(Rf4-f8) -0.05/16 7}
17. Nc5 {(Ne4-c5 Qd8-d6 Bb5-c4 Rf8-d8 Nc5-e6) +0.99/5 7} Rf6 {(Rf8-f6)
+0.05/16 6} 18. Ne6 {(Nc5-e6 Bc8xe6 d5xe6 Qd8-g8 Qe3xe5) +1.49/5 7} Bxe6
{(Bc8xe6) +1.20/18 6} 19. dxe6 {(d5xe6 Qd8-g8 Qe3xe5 Rf6xf2 Qe5xc7) +1.49/5
6} Qf8 {(Qd8-f8) +1.00/16 6} 20. Qe4 {(Qe3-e4 c7-c6 Bb5-e2 Rf6xf2 Rd1-d7)
+0.41/5 6} Rxe6 {(Rf6xe6) +1.25/15 6} 21. Qxb7 {(Qe4xb7 Re6-d6 Qb7xc7
Rd6xd1+) +1.08/4 6} Rb6 {(Re6-b6) +2.40/18 6} 22. Qd5 {(Qb7-d5 Ra8-b8 a2-a4
a7-a6 Bb5-c4 Rb6xb2) -0.56/6 4} Rab8 {(Ra8-b8) +2.35/17 6} 23. a4 {(a2-a4
a7-a6 Bb5-c4 Rb6xb2 Bc4-b3 e5-e4) -0.78/6 5} a6 {(a7-a6) +2.60/17 6} 24.
Bc4 {(Bb5-c4 Bg7-h6+ f2-f4 e5xf4 Qd5-d4+ Bh6-g7) -0.83/6 6} e6 {(e7-e6)
+3.85/17 5} 25. Qd7 {(Qd5-d7 Qf8-c5 b2-b3 Bg7-h6+ f2-f4) -0.61/5 6} Bh6+
{(Bg7-h6+) +5.10/17 5} 26. f4 {(f2-f4 Bh6xf4+ g3xf4 Qf8xf4+ Kc1-b1 Qf4xc4)
-2.18/6 4} Rxb2 {(Rb6xb2) +5.60/18 5} 27. Qxc7 {(Qd7xc7 e5xf4 Bc4-b3
Rb2xb3) -0.61/4 5} Bxf4+ {(Bh6xf4+) +299.95/64 0} 28. gxf4 {(g3xf4 Qf8xf4+
Rd1-d2 Rb2-b1+) -M2/8 3} Qxf4+ {(Qf8xf4+) +299.97/64 0} 29. Rd2 {(Rd1-d2
Rb2-b1+) -M1/9 4} Rb1# {(Rb2-b1+) +299.99/64 1} 0-1
[/pgn]