Note that WinBoard 4.6 has been superceded by WinBoard 4.7 as stable version.
WinBoard / XBoard 4.6.2
WinBoard 4.6 is the follow-up line of WinBoard 4.5, which ended with version 4.5.3. A special version of WinBoard is available for visually impaired people, for working with the JAWS or NVDA screen readers, but for now the old 4.5.2 is the latest JAWS version available. (See the post below or click here to get there.) WinBoard 4.6.0 has many new features added compared to its predecessors. WinBoard 4.6.2 is a bug-fix release, which contains nothing new, but fixes some problems that were discovered in the new features of 4.6. (Note that 4.6.1 was a regression, and has been expunged.)
WinBoard 4.6 can be downloaded as an installer package from here. This installer contains all essential support programs, such as Polyglot and timeseal, pre-installed and ready to run. It contains two demo engines, a native WinBoard engine (Fairy-Max 4.8) and a UCI engine (Fruit 2.1). The 4.6 installer also contains adapters for running Xiangqi UCI and UCCI engines, and Shogi USI engines, and optional engines for these and other Chess variants. Note that there has been a change in configuring WinBoard 4.6.2 for ICS play: the menu items for FICS and ICC now save their settings in a file winboard_ics.ini in the user's AppData folder, rather than relying on fixed settings from the FICS.ini and ICC.ini settings file (which not everyone was happy about). So any setting changes the user makes are now fully remembered for the next ICS session, but do not affect, and are not influenced, by setting changes done when using WinBoard for other tasks.
New features of WinBoard 4.6 include a built-in tournament manager, on-the-fly engine loading, and the possibility to search a loaded PGN file for a specific position. There exists a somewhat older experimental "Alien Edition", and as development goes on, new experimental versions will become available in the future.
Download WinBoard 4.6.2 installer (2.3MB)
Download WinBoard 4.6.0 executable + master ini file (500 kB)
Download experimental WinBoard executable (500 kB), (with support for some non-Chesslike games, such as Checkers and Amazons, see here).
Old versions:
WinBoard 4.5 downloads.
WinBoard 4.4 downloads.
This installer also contains optional sections for using WinBoard as a Xiangqi (Chinese Chess) GUI, and engines for Shogi (Japanese Chess), and for general Chess Variant aficionados. For more information about the Xiangqi capabilities of WinBoard, look here. The variants section provides engines for in total more than 20 widely different Chess Variants (most of them through the Fairy-Max and Pulsar engines), ranging from Chess960 and Gothic Chess to Crazyhouse, Losers and Atomic. For the exact rules of these games, see http://www.chessvariants.org .
The source code for WinBoard 4.6.2 and previous versions can be obtained from the GNU website. Use the tar ball that is tagged 4.6.2 (xboard-4.6.2.tar.gz). Most unzippers should understand this format (e.g. 7Zip).
What is New?
An elaborate description of the new features can be found on the GNU web pages. There you can also find a (new) User Guide summarizing the features of XBoard, which, apart from the screenshots, should largely apply to WinBoard as well.
Note that the UCI support built in this WinBoard version can only be fully exploited with Michel van den Bergh's recent Polyglot versions (which are of course included in the 4.6.2 installer pack). The source code of these are now collected in an on-line git repository, hosted at http://hgm.nubati.net/cgi-bin/gitweb.cgi . Note that the Polyglot included with WinBoard 4.6.2 was obtained by compiling the 2.0.1 version in the "learn" branch of that repository.
XBoard 4.6.2
Version 4.6.2 also includes a new XBoard which supports the same new features as WinBoard. New for XBoard is that 4.6 includes a lot of "desktop support": it defines mime types and icons for pgn, fen and trn files, and associates these file with XBoard in various modes as handler, so that simply clicking the files is enough to start up XBoard in the applicable mode. Binary packages for various Linux distributions should be available from the build server. (Consult the XBoard home page how to get there.) People using other Unix / Linux distributions can install from source. The sources are kept at the GNU XBoard website.
WinBoard / XBoard source code
XBoard 4.6.0 new Match Options dialog