7 versus 5*SQRT(2) 邊長只相差 0.0710675 外框近似,49與50的格網又必須互相旋轉45度更增加它的難度。四五半方塊填滿 雙方塊拼盤,會剩下2片四半方塊的型片。又X&H型片與49+50拼盤外形類似,左邊的解答旋轉一下就是首頁的圖示。
Ref: Polyaboloes by Peter F.Esser , solver download: mops.zip
See also The Poly Pages by Andrew Clarke : Polyaboloes
2002/06/19 add in