Imagination is more important than knowledge.
--  Albert Einstein

About Company

Started in 1980, retired in 2004 REBEL was baptized into ProDeo, latin for gratis according to Dutch tradition.

Version history

   ProDeo 1.8 series



    ProDeo 1.7 series



    Even older versions





ProDeo (version 1.81)  approximately 2700 ELO - Size 4 Mb

Download ProDeo 1.81 

After the download open the archive and extract the folder ProDeo 1.8.1 to your harddisk.


To run ProDeo you will need to announce the engine first.


Under Chessbase this means: Engine -> New UCI engine -> Browse -> RebelUCI.exe

Under ChessPartner do: Extra -> Engine Import Wizard -> Winboard -> Install -> ProDeo.exe

Under ARENA do: Engines -> New Engine -> UCI -> RebelUCI.exe


ARENA is freeware and can be downloaded here.



Release Notes 1.81

August 7, 2012


Fixing an old scaling problem that was known but neglected because of laziness (I can afford that

luxury) and lack of an easy solution. With increasing time controls Rebel 12, ProDeo tended to

lose more and more strength in comparison with other engines.


Oddly a program that was known in the past to perform better at longer time controls than at

blitz has gone completely the opposite way. The price one has to pay for doing nothing. Version

1.81 is meant to turn that tide and its test results look good.


 ProDeo 1.81

 ProDeo 1.8

Blitz 1+1


 1200 games

 ProDeo 1.81

 ProDeo 1.8

Blitz 2+2


   800 games

 ProDeo 1.81  Fruit 2.1

Blitz 1+1


  400 games

 ProDeo 1.81  Fruit 2.1

Blitz 2+2


  400 games





 ProDeo 1.8  Gaviota 0.85 x64

40 in 4m


  100 games

 ProDeo 1.81  Gaviota 0.85 x64

40 in 4m


  100 games


Based on these results one might expect this upwards pattern to continue at longer time controls.




 Chess program  Ed Schröder
 Opening Book  Jeroen Noomen
 Winboard support  Lex Loep
 UCI Interface  Odd Gunnar Malin
 Beta tester  Thorsten Czub



Programmer code (ideas taken from external sources)


 ProDeo 1.6  Fruit 2.1  eval.cpp line 1023  Penalty for caught bishops on the 6th row.
 ProDeo 1.6  Fruit 2.1  eval.cpp line 1063  Free rook in case of lost castling rights.
 ProDeo 1.8  Stockfish 2.11  evaluate.cpp line 192

 Added the principle of safe_queen_checks to

 King Safety.




Copyright ® 2011 Ed Schröder