棋盘覆盖 在一个2k×2k 个方格组成的棋盘中，恰有一个方格与其它方格不同，称该方格为一特殊方格，且称该棋盘为一特殊棋盘。在棋盘覆盖问题中，要用4种不同形态的L型骨牌覆盖给定的特殊棋盘上除特殊方格以外的所有方格，且任何2个L型骨牌不得重叠覆盖。-Board covered in a 2k × 2k a board consisting of squares, just a different box and other boxes, saying that the square is a special box, and said the board is a unique board. Coverage problems in the board, to use four kinds of different forms of L-type domino coverage given special board except in special than all the grid squares, and any of two L-type domino not overlap coverage.