84,488,480 programs installed

Should I remove Rybka 4?

What percent of users and experts removed it?
1% remove it99% keep it
Overall Sentiment
What do people think about it?
Be the first to rate (click star to rate)
How common is it?
Global Rank #26,888
United States Rank #33,829
Reach 0.0060%
Lifespan of installation (until removal)
< 20.38 days
297.60 days >
Average installed length: 156.37 days


VersionDistribution 1.68%
12.0.0 98.32%

Rybka 4

What is Rybka 4?

Rybka is a computer chess engine designed by International Master Vasik Rajlich. Rybka 4 is a normal UCI engine, without copy protection. Full chess analysis packages which include Rybka 4 will be made by ChessBase (www.chessbase.com) and Convekta/ChessOK (www.chessok.com). There are separate single-processor and multi-processor versions. Plain Rybka 4 UCI without GUI for download only is available from RybkaChess. All of these versions of Rybka 4 will be identical and can be used in any UCI-compliant GUI.


The most common release is 12.0.0, with over 98% of all installations currently using this version. A scheduled task is added to Windows Task Scheduler in order to launch the program at various scheduled times (the schedule varies depending on the version). The setup package generally installs about 13 files and is usually about 525.66 KB (538,272 bytes).

Program detailsProgram details

URL: www.ChessBase.com
Installation folder: C:\Program Files\ChessBase\ChessProgram12
Uninstaller: "C:\Program Files\InstallShield Installation Information\{F9683839-1A7F-4874-91B7-64CDF4AC4679}\setup.exe" -runfromtemp -l0x0009 -removeonly
Estimated size: 525.66 KB
Language: English

Program filesFiles installed by Rybka 4

  • Chess32.dll - ChessBase GmbH Chess Engine Protocol (Chess Engine Protocol for ChessBase and Fritz)
  • ChessRes.dll - ChessRes Dynamic Link Library
  • FrameRes.dll - FrameRes Dynamic Link Library
  • Fritz Chess Benchmark.exe - Fritz Chess Benchmark
  • ChessProgram12.exe - ChessProgram 12 UI (ChessProgram 12)
  • TBAccess.dll - Tablebase Access
  • SView3.dll - SView Library (SView)
  • ChessBaseAdminTool.exe - AdminTool (ChessBase Admin Tool)
  • Device32.dll - DeviceLi
  • GDFInstall.exe - GDFInsta
  • Textures3.dll - Textures

Program behaviorsBehaviors exhibited

Scheduled Task
  • ChessProgram12.exe is scheduled as a task with the class '{EA2EE8F4-AC15-4FD8-8FBA-B9FA13DA5BF8}' (runs on registration).

How do I remove Rybka 4?

You can uninstall Rybka 4 from your computer by using the Add/Remove Program feature in the Window's Control Panel.
  1. On the Start menu (for Windows 8, right-click the screen's bottom-left corner), click Control Panel, and then, under Programs, do one of the following:
    • Windows Vista/7/8/10: Click Uninstall a Program.
    • Windows XP: Click Add or Remove Programs.
  2. When you find the program Rybka 4, click it, and then do one of the following:
    • Windows Vista/7/8/10: Click Uninstall.
    • Windows XP: Click the Remove or Change/Remove tab (to the right of the program).
  3. Follow the prompts. A progress bar shows you how long it will take to remove Rybka 4.

Win 7 (SP1) 53%
Win XP 6%
Uninstall it 1%
Keep it 99%

Windows OS versionsWindows

Which Windows OS versions does it run on?
Windows 7 59.66%
Windows 10 28.57%
Windows Vista 5.88%
Windows XP 5.88%
Which OS releases does it run on?
Windows 7 Home Premium 27.73%
Windows 7 Ultimate 21.85%
Windows 10 Pro 8.40%
Windows 7 Professional 8.40%
Windows 10 Home 6.72%
Microsoft Windows XP 5.88%

Distribution by countryGeography

26.36% of installs come from the United States
Which countries install it?
  United States 26.36%
  Germany 8.53%
  Canada 5.43%
  France 4.65%
  Spain 4.65%
  Netherlands 4.65%
  Italy 4.65%
  Hungary 3.88%
  TN 2.33%
  Belgium 2.33%
  India 2.33%
  Greece 2.33%
  United Kingdom 2.33%
  Brazil 1.55%

OEM distributionPC manufacturers

What PC manufacturers (OEMs) have it installed?
Acer 32.86%
Dell 12.86%
ASUS 11.43%
Hewlett-Packard 10.00%
Lenovo 7.14%
Toshiba 5.71%
Intel 2.86%
Medion 2.86%
Samsung 2.86%
Alienware 1.43%
Common models
ASUS All Series 3.19%
HP Pavilion 15 Notebook P... 2.13%
MEDIONPC MS-7366 2.13%
MSI MS-7888 2.13%
Acer AOD257 2.13%
Acer Aspire 7745G 2.13%

About (from ChessBase GmbH)

If there is one place to play online chess, this is it! On Playchess.
Publisher URL: www.chessbase.com


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