New J.A Compiles

[Roland Chastain]

https://github.com/jimablett/Chest-XB
Chest-XB 0.0.1 by Heiner Marxen

Hello Jim! Very interesting. Thank you for sharing.

Did you see my question in Issues section?

[Jim Ablett]

https://github.com/jimablett/Chest-XB
Chest-XB 0.0.1 by Heiner Marxen

Hello Jim! Very interesting. Thank you for sharing.

Did you see my question in Issues section?

Hi Roland,

I missed uploading the important files. I will fix this now. You also use the full src code in 'chest_xb_001_64_ja.zip'.

I checked out your ZZZZZZ 5 upload. Nice, well done. I did notice a bug when testing that ZZZZZZ 5. Engine moves
instantly when playing blitz 4|2 time control.

Jim.

[Roland Chastain]

I missed uploading the important files. I will fix this now. You also use the full src code in 'chest_xb_001_64_ja.zip'.

Thank you.

I checked out your ZZZZZZ 5 upload. Nice, well done. I did notice a bug when testing that ZZZZZZ 5. Engine moves
instantly when playing blitz 4|2 time control.

Thank you for testing and reporting. I will investigate.

[Jim Ablett]

https://github.com/arnavlul/Ply
Ply 1.0.0 by Arnav Tyagi

Ply 1.0.0 64 JA

Windows/Linux & Android profiled builds

Proton link:
https://drive.proton.me/urls/DEGPXFCS3W#NaJHXXtLPhOR

Smash link:
https://fromsmash.com/Ply100JA

Jim.

[Max]

Hi Jim,

got several Phalanx XXV UCI games flagged as lost, because of an illegal move when promoting.

Example last pgn line, with Phalanx as black while promoting it's a-pawn in a winning position:

Code: Select all

35. Kf2 {-6.50/25 3.59s} {black forfeits by illegal move a2a1} 1-0

I was using Myracle chess gui build 118 and this Phalanx version on linux:

466240 Feb 21 2026 phalanx_xxv_64_ja_uci_sse4_linux

Not sure if this was your latest released engine binary.

[Jim Ablett]

Hi Jim,

got several Phalanx XXV UCI games flagged as lost, because of an illegal move when promoting.

Example last pgn line, with Phalanx as black while promoting it's a-pawn in a winning position:

Code: Select all

35. Kf2 {-6.50/25 3.59s} {black forfeits by illegal move a2a1} 1-0

I was using Myracle chess gui build 118 and this Phalanx version on linux:

466240 Feb 21 2026 phalanx_xxv_64_ja_uci_sse4_linux

Not sure if this was your latest released engine binary.

Hi Max,

Thanks for bug report. I'll fix it and post an update later.

Jim.

[Jim Ablett]

https://github.com/jimablett/Phalanx-XXV-UCI
Phalanx XXV UCI by Dusan Dobes

Phalanx XXV UCI 64 JA

Update: Fixed promotion bug.

Windows/Linux & Android profiled builds

Proton link:
https://drive.proton.me/urls/NPS4958HWW#DkVXbeNnkdg1

Smash link:
https://fromsmash.com/PhalanxXXVUCI

Jim.

[MOBMAT]

I get a Windows Defender warning of a possible Trojan virus when I attempt to DL

Phalanx XXV UCI by Dusan Dobes

This happened on both the GitHub asset and the SMASH download

V

[Jim Ablett]

I get a Windows Defender warning of a possible Trojan virus when I attempt to DL

Phalanx XXV UCI by Dusan Dobes

This happened on both the GitHub asset and the SMASH download

V

Nothing detected here in Virustotal > https://tinyurl.com/2m99nfda

Jim.

[Max]

Thanks Jim!

Phalanx XXV UCI 64 JA

Update: Fixed promotion bug.

I can confirm, that the bug is fixed.

[pgn][Date "2026.09.02"]
[Round "1"]
[White "Coda 0.9.4-28-g55e77b1"]
[Black "Phalanx XXV JA"]
[Result "0-1"]
[TimeControl "60+1"]
[SetUp "1"]
[FEN "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/R1BQKBNR w KQkq - 0 1"]
[GameDuration "00:02:39"]
[PlyCount "74"]
[Termination "black wins by checkmate"]

1. e4 {-4.43/21 0.85s} d5 {3.07/14 2.23s} 2. exd5 {-4.46/19 0.70s} Qxd5 {3.34/14
3.24s} 3. Nf3 {-4.44/19 0.59s} Nc6 {3.37/13 2.62s} 4. d4 {-4.39/18 0.66s} e5 {3.49/13
2.16s} 5. Be3 {-4.34/20 1.08s} exd4 {3.57/12 2.40s} 6. Nxd4 {-4.40/19 0.92s} Nf6 {3.44/13
3.00s} 7. Nxc6 {-4.55/21 5.63s} Qxc6 {3.95/13 2.03s} 8. Qe2 {-4.52/21 2.61s} Bd6 {3.97/12
2.33s} 9. Bd4+ {-4.44/21 4.46s} Be6 {4.13/14 2.00s} 10. Qb5 {-4.46/23 3.22s} O-O {4.16/13
2.78s} 11. O-O-O {-4.45/21 1.02s} Qd5 {4.58/13 2.72s} 12. Qxd5 {-4.37/18 0.93s} Nxd5 {4.56/14
2.67s} 13. g3 {-4.33/20 0.94s} Rad8 {4.93/13 1.84s} 14. Bg2 {-4.22/18 0.92s} c5 {5.27/16
2.57s} 15. Bxg7 {-4.07/20 1.78s} Kxg7 {6.41/16 2.30s} 16. Bxd5 {-4.00/20 1.36s} Bxd5 {6.68/17
2.00s} 17. Rxd5 {-3.64/20 0.75s} Bf4+ {6.76/16 1.80s} 18. gxf4 {-4.13/18 2.33s} Rxd5 {6.72/14
2.40s} 19. Rg1+ {-4.32/22 6.71s} Kf6 {7.31/15 2.31s} 20. h3 {-3.87/21 11.11s} Re8 {7.84/16
1.55s} 21. b3 {-4.09/20 2.79s} Re2 {7.89/16 1.69s} 22. Rd1 {-4.32/21 1.95s} Rxd1+ {9.86/15
1.53s} 23. Kxd1 {-4.61/20 1.36s} Rxf2 {9.90/15 2.24s} 24. f5 {-4.94/26 2.63s} Kxf5 {10.44/14
2.18s} 25. h4 {-4.95/28 12.97s} h5 {11.09/13 1.59s} 26. Kc1 {-5.46/28 7.34s} Kg4 {12.45/14
2.12s} 27. Kd1 {-6.85/26 1.94s} Kxh4 {14.57/13 2.07s} 28. Kc1 {-7.23/25 3.92s} Kg4 {19.09/14
2.00s} 29. Kb2 {-7.80/21 1.10s} h4 {19.77/14 2.00s} 30. Kc3 {-8.68/19 1.77s} h3 {20.24/13
1.97s} 31. Kc4 {-M8/24 1.14s} h2 {20.27/11 1.92s} 32. Kxc5 {-M6/36 0.99s} h1=Q {+M6/9
1.11s} 33. Kd6 {-M5/43 0.64s} Qc6+ {+M5/7 0.25s} 34. Ke7 {-M4/76 0.45s} Qf6+ {+M4/5
0.02s} 35. Kf8 {-M3/100 0.03s} Rxc2 {+M3/4 0.01s} 36. Ke8 {-M2/100 0.00s} Rd2 {+M2/3
0.00s} 37. b4 {-M1/100 0.00s} Rd8# {+M1/3 0.00s} {black wins by checkmate} 0-1[/pgn]