Veitch

\begin{tikzpicture}[scale=1.25]
            \draw (0,0) grid (8,4);
            \node at (3.5,.5){ };
            \node at (3.5,1.5){ };
            \node at (2.5,0.5){ };
            \node at (2.5,1.5) { };
            \node at (.5,.5) { };
            \node at (.5,1.5){ $\top$  };
            \node at (1.5,0.5){ };
            \node at (1.5,1.5){ $\top$ };
            \node at (3.5,3.5){ };
            \node at (3.5,2.5){ };
            \node at (2.5,3.5){ };
            \node at (2.5,2.5){ $\top$  };
            \node at (0.5,3.5){ $\top$ };
            \node at (0.5,2.5){ $\top$  };
            \node at (1.5,3.5){ $\top$ };
            \node at (1.5,2.5){ $\top$  };
            \node at (7.5,.5) { };
            \node at (7.5,1.5){ };
            \node at (6.5,0.5){ };
            \node at (6.5,1.5) { };
            \node at (4.5,.5) { };
            \node at (4.5,1.5){ };
            \node at (5.5,0.5){ };
            \node at (5.5,1.5){ };
            \node at (7.5,3.5){ };
            \node at (7.5,2.5){ };
            \node at (6.5,3.5){ };
            \node at (6.5,2.5){ $\top$ };
            \node at (4.5,3.5){ $\top$ };
            \node at (4.5,2.5){ $\top$  };
            \node at (5.5,3.5){ $\top$ };
            \node at (5.5,2.5){ $\top$  };
            \draw (-0.3,4) --node[midway, left]{\tiny A} (-0.3,2);
            \draw (0,4.3) --node[midway, above]{\tiny B} (2,4.3);
            \draw (4,4.3) --node[midway, above]{\tiny B} (6,4.3);
            \draw (1,-0.2) --node[midway, below]{\tiny C} (3,-0.2);
            \draw (5,-0.2) --node[midway, below]{\tiny C} (7,-0.2);
            \draw (8.3,1) --node[midway, right]{\tiny D} (8.3,3);
            \draw (0,-0.8) --node[midway, below]{\tiny E} (4,-0.8);
            \draw [line width=0.5mm ] (4,0) -- (4,4);
            \draw [color=blue, rounded corners=2mm] (0.15, 2.15) -- (0.15,3.85) -- (1.85,3.85) -- (1.85, 2.15) -- cycle;
            \draw [color=blue, rounded corners=2mm] (4.15, 2.15) -- (4.15,3.85) -- (5.85,3.85) -- (5.85, 2.15) -- cycle;
            \draw [color=red, rounded corners=2mm] (0.1, 1.1) -- (0.1, 2.9) -- (1.9,2.9) -- (1.9, 1.1) -- cycle;
            \draw [color=green, rounded corners=2mm] (1.1, 2.1) -- (1.1,2.95) -- (2.9,2.95) -- (2.9, 2.1) -- cycle;
            \draw [color=green, rounded corners=2mm] (5.1, 2.1) -- (5.1,2.95) -- (6.9,2.95) -- (6.9, 2.1) -- cycle;

        \end{tikzpicture}