WinBoard Portable 4.6.2 is a graphical user interface for chess in all its major forms, including international chess, xiangqi (Chinese chess), shogi (Japanese chess) and others. It displays a chessboard on the screen, accepts moves made with the mouse, and loads and saves games in Portable Game Notation (PGN). It's packaged in PortableApps.com Format so it can easily integrate with the PortableApps.com Platform. And it's open source and completely free.

WinBoard Portable is packaged in a PortableApps.com Installer so it will automatically detect an existing PortableApps.com installation when your drive is plugged in. It supports upgrades by installing right over an existing copy, preserving all settings. And it's in PortableApps.com Format, so it automatically works with the PortableApps.com Platform including the Menu and Backup Utility.

Features
WinBoard is a graphical user interface for chess in all its major forms, including international chess, xiangqi (Chinese chess), shogi (Japanese chess) and Makruk, in addition to many minor variants such as Losers Chess, Crazyhouse, Chess960 and Capabanca Chess. It displays a chessboard on the screen, accepts moves made with the mouse, and loads and saves games in Portable Game Notation (PGN). It serves as a front-end for many different chess services, including:

* Chess engines that will run on your machine and play a game against you or help you analyze, such as GNU Chess, Crafty, or many others.
* Chess servers on the Internet, where you can connect to play chess with people from all over the world, watch other users play, or just hang out and chat.
* Correspondence chess played by electronic mail. The CMail program automates the tasks of parsing email from your opponent, playing his moves out on your board, and mailing your reply move after you've chosen it.

XBoard runs on Unix and Unix-like systems that use the X Window System.

What is new in WinBoard / XBoard 4.6.2?
This version fixes some bugs found in 4.6.0. Here is a quick list of the changes:
* Fix memory corruption bug on second-engine loading (through menu or in tournament), which could destroy -firstInitString
* Fix bug loading a new engine through the menu (not loading it with the full game, but just upto the current move)
* Prefix engine command with "./" when a pathname is split up during install, so the engine actually runs (XB)
* Fix fall-back to -ncp mode when engine does not start (cutting short the feature timeout)
* Fix bug in position search for FRC castlings (where a King could 'fall off' the board)
* Fix bug in deriving castling rights for games with holdings after Edit Position (where Qq were never granted)
* Display a message informing the user how to clear the board, in sweep-select edit-position mode
* Fix a bug that could stop the clock when the board window was dragged (XB)
* Fix switching off highlighting during game (so last highlights do not remain for the rest of the game)
* Allow user to enter the name of a non-existing file when browsing for a save file (WB)
* Make sure rarely used engine-related options (such as -firstNPS) are also correctly loaded during session
* Correctly handle parsing of Crazyhouse promotions with legality-testing off
* Fix click-click detour under-promotions, which were not working for non-captures
* Don't strip path from engine command if directory is explicitly given in Load Engine dialog
* Consistently make auxiliary windows top level-shells or not, with new -topLevel option (XB)
* No longer fatal if second engine does not support current variant (just refuse Two Machines mode)
* Scroll XBoard game list to keep selected item in view (XB)
* Suppress spurious error popup when starting observing of bughouse games
* Fix vertical axis ticks in eval graph with drop games
* Put title on same line as menu bar only for -size 72 and larger (with -titleInWindow, XB)
* Properly open and close debug file when switching debug mode through key binding Ctrl-D (XB)