theorem :: GOBOARD6:66

for i being Nat
for G being Go-board st 1 <= i & i < len G & 1 < width G holds
LSeg ((((1 / 2) * ((G * (i,1)) + (G * ((i + 1),1)))) - |[0,1]|),((1 / 2) * ((G * (i,1)) + (G * ((i + 1),2))))) c= ((Int (cell (G,i,0))) \/ (Int (cell (G,i,1)))) \/ {((1 / 2) * ((G * (i,1)) + (G * ((i + 1),1))))}