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Arena 3.5

Arena 3.5 is available since 2014-01-01

small arrow Arena 3.5 ZIP (17 MB): Arena 3.5 with engines SOS 5.1, AnMon 5.75, Hermann 2.8, Ruffian 1.05, Rybka 2.3.2a free, Spike 1.4, book Perfect_2010 by Sedat Canbas, mini book Titus 2.4 (by Kevin Frayer), mini book Olympiad, PGN database from Olivier DEVILLE, EloStat 1.3, Gaviota 3-men tablebases, Speedtest 1.0.2, flags, fonts, graphics, help files, without setup program.

small arrow Arena 3.5 setup (16 MB): Arena 3.5 setup includes everything from the ZIP plus engines Nejmet 3.07 and Dragon 4.6 plus move announcements.  

Most important changes compared to last public version 3.0: 


  • Filter (=Search) positions in PGN
  • PGN lists faster sorting
  • PGN loads faster
  • Rare PGN loading errors fixed
  • "PGN->New" command handled correctly: "Select new PGN file"-dialogue, then you can paste PGNs from Clipboard into empty file
  • Filter Game Data: Progress bar updated during filtering
  • You can now filter games with date ranges
  • "Filter games with some fields did not work"- bug removed
  • Useless "?"-s removed in PGN list
  • PGN and EPD lists can be always on top (click on the icon in the top left corner to see the system menu of the window)
  • Arena now remembers column width of PGN and EPD lists
  • Arena reads short comments (! ? etc) from PGNs, also in PGN book import


  • Common max. CPU cores setting for UCI engines
  • Switching engine from UCI to Winboard if it is apparent (if engine sends "error: uci", we go Winboard)
  • UCI Filter can be switched off for analysis
  • Engines can be locked to position, you can go to the lock position
  • Engines can be paused, if you have temporarily other things to do with your PC
  • Java engines easier selectable


  • Default graphics scheme is now BirchTauri
  • Tablebases piece letters localised, Gaviota TB information added
  • Lists black background bug removed
  • Colours for pieces
  • Added horizontal scroll buttons for mainlines
  • Analysis lines additional option: kNodes in mainlines
  • Analysis lines additional option: Show # of cores
  • Displaying engine time for the pvs now (was generated by Arena before)
  • Analysis lines additional option: Compact variation display (show line only if first move changed)
  • Analysis lines additional option: Short form for boxes (e.g. "D" instead of "Depth")
  • Re-sizable logo area
  • Dialogues clearer design
  • Pieces from True Type fonts can now also use Unicode fonts


  • Early draw adjudication (if value = zero) in tournaments
  • Table based draw adjudication in tournaments
  • Tournament ponder+book bugs fixed
  • Arena uses less CPU time in demo and tournament mode
  • Bugs where tournament area fonts not selectable removed


  • Opening classification improved (compares position instead of move sequence)
  • Add variation to game: Pop-up menu item and from variation board
  • Bug fixes in variation board
  • Warnings if too much RAM or too many cores configured
  • Autoplayer repaired
  • "Book moves not displayed"- bug removed
  • "Engine not playing if previous move from Arena engine book"- bug removed
  • Ponder display improved
  • Save position in EPD format
  • Get position in The Problemist format ( from clipboard, no fairy pieces
  • Log window now faster and coloured (colours come from arrow colours)
  • More player graphics possible
         (, unzip to <Arena>\Graphics\Players)
  • Mouse wheel scrolls mainlines and EPD list if above them
  • Tool bar can also be on left side
  • Option to extract player's country from name, e.g.:(ITA) -> Shows Italian flag
  • Help files updated


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