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[[FILE:SamuelBakUnexpected.jpg|border|right|thumb|link=http://chgs.elevator.umn.edu/asset/viewAsset/57f3b6787d58ae5f74bf8ba9#57f3b6d77d58ae5574bf8bba|[[Arts#Bak|Samuel Bak]] - Unexpected <ref>[http://chgs.elevator.umn.edu/asset/viewAsset/57f3b6787d58ae5f74bf8ba9#57f3b6d77d58ae5574bf8bc4 Chess in the Art of Samuel Bak], [http://www.chgs.umn.edu/ Center for Holocaust & Genocide Studies], [https://en.wikipedia.org/wiki/University_of_Minnesota University of Minnesota]</ref> ]]
'''Pawn Fills''' are base of [[Pawn Spans|spans]]. They are used to determine '''closed''', [[Half-open fileFile|half-open]] and [[Open fileFile|open]] files.
<span id="FrontandRearFill"></span>
=Front- and Rearfill=
