Pretty Patterns

Order 3

Permutation
(r1,b1,++d3) (u1,++l3,++f3) (f1,+d2,-r4) (l1,-b4,-d4) (d1,+l2,+f2) (r2,b2,+u3) (u2,++l4,+b3) (r3,+f4,+u4)

6 Sieves


Algorithm Alexander Ooms 2005
(NF NB · NR NL)4 (16 btm, 32 ftm, 32 qtm)

Algorithm Walter Randelshofer 2017
NF' NB' · NU' ND' · NF' NB' · NU ND · NF2 NB2 (10 btm, 20 ftm, 24 qtm)

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