error message when syntactically validating a King's move into a check position is now correct

verified that checkmate notation does work correctly

fixes ambiguity resolver in PGN output not resolving ambiguities for diagonally attacking Knights

PGN output now correctly breaks after black has also moved

fixes castling not printed correctly to PGN

move log has now three columns and starts scrolling after 45 moves

fixes move validation working on old king's position, when the king moves

fixes wrong macro expansion for is_attacked()

adds error messages to PGN reader

fixes inappropriate use of EXIT_ macros + adds a sample PGN file

simplifies Makefiles

using pkg-config in hand crafted make file

fixed hypthetical bug, where the client address is not correctly retrieved by accept()

updated copyright and version info

implemented FEN

fixed new network games starting with BLACK

added program version

added support for game continuation over network + fixed major bug in checkmate anticipation when the king is attacked diagonally

added pgn parser and writer (without comment support yet) + minor refactorings

logging string representation of moves in short algebraic notation

added return code to move validation (for more informative messages) + fixed a bug where simulations added movelist items to the original gamestate

refactoring of getlocation mechanism for better short algebraic notation support (does now respect pinned pieces) + fixed a bug where a pawn could advance through a piece (e.g. e2e4 could jump over a piece on e3)

netcode is now aware of connection losses

removed nonblocking sockets for causing problems and not being necessary

(0) -50 -24 tip

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