Download Arena Chess GUI 3.5

Arena is a free Graphical User Interface (GUI) for chess. Arena assists you in analyzing and playing games as well as in testing chess engines. It runs on Windows XP or higher or on Linux with Wine 1.0 or higher. Arena is compatible to Winboard protocol I, II and UCI protocol I, II. Furthermore, compatible to Chess960, DGT electronic chess board & DGT clock XP, Novag Citrine, Autoplayer, ICS (chess servers) and much more.

Arena 3.5

Arena 3.5 is available since 2014-01-01

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.

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:
PGN:

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

Engines:

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

Settings:

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

Tournaments:

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

Misc:

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 (www.theproblemist.org) from clipboard, no fairy pieces
Log window now faster and coloured (colours come from arrow colours)
More player graphics possible
(http://sourceforge.net/projects/scid/files/Player%20Data/Latest%20data, 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