Pitfalls.pgn update

[Norm Pollock]

I have released Pitfalls.pgn (2007.06.09). The download link is at Jim Ablett's site:

http://homepages.tesco.net/henry.ablett/jims.html

The original version of Pitfalls.pgn contained 62K games of up to 15 moves (30 plies) that ended in a white or black win. However, half the games did not show a positional advantage for either side. In these cases, the result seemed to be due to an unexplained forfeit.

To remove this defect, this new version of Pitfalls.pgn only contains games of up to 15 moves that end in a checkmate. Accordingly, the file is very small as only 7K games are included.

Users should go through these games to find the point at which each game takes a drastic turn (the pitfall move). The games should also help otb players prepare for particular openings. The games are ordered by opening, and contain only full moves on each line.

-Norm