Board Game Geek has an entry for what I think is the game...

http://boardgamegeek.com/boardgame/6858/swordplay

I recently acquired a copy of this game with a blue cardstock cover and white cardstock counter sheets instead of a yellow cover and yellow cardstock counter sheets.  The cover of the yellow edition has a box below the authors name that states "with fantasy supplement."  The blue covered version does not have this box or statement.  At first glance the interior pages appear to be identical.  Same 1976 copyright, same number of pages, etc.  What appears to be the "Fantasy supplement" is a paragraph on one page followed by a table with stats for various fantasy monsters.  Again, identical in both copies.  The small Ziploc bag in the yellow version has 8 total swords, 2 of each color, and a single 6-sided die.  The small Ziploc bag in the blue version has the identical swords with 2 extra yellow ones and no die present.  Both the large and small Ziploc bags on both games appear to be identical.  

Anyone else have a blue version like the one described above?

Thanks, Stratochamp.

Is there any printing history on how many copies were distributed or in what order these were released (green, blue, yellow)?

Chris