Test for CCRL 40/4: New engine Zorgus 1.1 64-bit

[Sergio Martinez]

Code: Select all

Zorgus 1.1 64-bit             :  349 (+ 91,= 76,-182), 37.0 %

Horizon 4.4                   :  30 (+  8,=  4,- 18), 33.3 %
Jumbo 0.5.3 64-bit            :  30 (+  2,=  7,- 21), 18.3 %
Eveann 1.72                   :  30 (+  3,=  6,- 21), 20.0 %
GopherCheck 0.2.3 64-bit      :  30 (+  3,= 10,- 17), 26.7 %
Isa 2.0.48 64-bit             :  20 (+  4,=  2,- 14), 25.0 %
Dorpsgek Dillinger 64-bit     :  30 (+  7,=  6,- 17), 33.3 %
Baislicka 1.0 64-bit          :  30 (+ 11,=  5,- 14), 45.0 %
Tiny Chess 1.46 64-bit        :  30 (+  7,=  8,- 15), 36.7 %
Soldat III 0.187 64-bit       :  30 (+ 11,=  6,- 13), 46.7 %
GK 0.90 64-bit                :  30 (+ 10,= 11,-  9), 51.7 %
AdroitChess 0.4               :  29 (+  8,=  7,- 14), 39.7 %
Alcibiades 0.2.7 64-bit       :  30 (+ 17,=  4,-  9), 63.3 %

New engine by Olivier de Lannoy
http://olivier.delannoy.free.fr/chess-zorgus/

PGN file: http://kirill-kryukov.com/chess/discuss ... p?id=40453

[Ras]

This isn't a new engine, it is NG-Play without many changes.

The UCI interface would be the only new thing and not trivial to add because NG-Play is single-threaded and sequential. Guess what, Zorgus' UCI mode doesn't accept the "stop" command during calculation.

George Georgopoulos (author of NG-Play) hasn't given a formal licence, but the header in NG-Play clearly states that while derivatives are allowed, it has to stay open source. From NG-Play source:

Code: Select all

/*         You are free to copy/derive from this code     */
/*         as long as you mention this copyright          */
/*         and keep the new code open source              */

Zorgus is violating this.

I took a few quick checks in the interactive mode with text board (looking identical!).

Position is after 1. a2-a3 a7-a6 from the initial position; this gets the engines out of the book. The following depths have exactly the same eval and principal variation up to depth 9 plies, then it becomes a bit different. (note: the CT800 engine has completely different evals and PVs).

Even the accounted move overhead is the same, 100 ms. I've checked with a hex editor, the visible function names are the same, though reading FEN positions from a file is new in Zorgus.

The biggest joke from Oliviers website:

"You are allowed to distribute Zorgus as freeware as long as the original files remain unchanged. Any commercial use is not allowed without written permission of the author."

Taking an existing open source engine, violating the "must stay open source" condition and slapping a copyright on "Zorgus"?!

[Sergio Martinez]

This isn't a new engine, it is NG-Play without many changes.

The UCI interface would be the only new thing and not trivial to add because NG-Play is single-threaded and sequential. Guess what, Zorgus' UCI mode doesn't accept the "stop" command during calculation.

George Georgopoulos (author of NG-Play) hasn't given a formal licence, but the header in NG-Play clearly states that while derivatives are allowed, it has to stay open source. From NG-Play source:

Code: Select all

/*         You are free to copy/derive from this code     */
/*         as long as you mention this copyright          */
/*         and keep the new code open source              */

Zorgus is violating this.

I took a few quick checks in the interactive mode with text board (looking identical!).

Position is after 1. a2-a3 a7-a6 from the initial position; this gets the engines out of the book. The following depths have exactly the same eval and principal variation up to depth 9 plies, then it becomes a bit different. (note: the CT800 engine has completely different evals and PVs).

Even the accounted move overhead is the same, 100 ms. I've checked with a hex editor, the visible function names are the same, though reading FEN positions from a file is new in Zorgus.

The biggest joke from Oliviers website:

"You are allowed to distribute Zorgus as freeware as long as the original files remain unchanged. Any commercial use is not allowed without written permission of the author."

Taking an existing open source engine, violating the "must stay open source" condition and slapping a copyright on "Zorgus"?!

Thanks for your explanation Rasmus