add pawn functionality (attacks)
add pawn big first moves
add Board#in_check? (and live debugging mid-game)
almost implement checkmate (i think) pending fix to Pawn
fix Board#checkmate by updating pawn functionality
make IllegalMoveError exceptions more specific
change pieces for a black terminal & white font
add border
set winner/loser of board when checkmate occurs
work with players color attributes; quit functionality and input checking
move cursor out of Game (input to HumanPlayer storage/printing to Board)
add name functionality to Human, Game, and Board
implement randomly moving computer class
computer makes a capture if one is available
computer player captures highest-value capturable piece
allow hh,cc,hc,ch type games; move cursor to Player classes
refactor ComputerPlayer