Holeless Baiocchi Figures for Pentomino-Hexomino Pairs

Introduction

A pentomino is a plane figure formed by joining 5 equal squares edge to edge. There are 12 pentominoes:

A hexomino is a plane figure formed by joining 6 equal squares edge to edge. There are 35 hexominoes:

A Baiocchi figure is a figure formed by joining copies of a polyform and having the maximal symmetry for the polyform's class. For polyominoes, that means square symmetry, or 4-way rotary with reflection.

We can also define Baiocchi Figures for sets of polyominoes. Here I show minimal known Baiocchi Figures without holes for pairs consisting of a pentomino and a hexomino. The figures must use at least one copy of each polyomino.

See also

  • Baiocchi Figures for Pentomino-Hexomino Pairs (allowing holes)
  • Baiocchi Figures for Pentomino Pairs
  • Baiocchi Figures for Hexomino Pairs
  • Baiocchi Figures for Tetromino-Pentomino Pairs
  • Baiocchi Figures for Tetromino-Hexomino Pairs
  • Solutions

    The figures in the table show the areas of the solutions. One pair, 5U+6-8, has no known solution.

      1234567891011121314151617181920212223242526272829303132333435
    F6461448452494484324461444444444453444464444444216461446144444449214444
    I2136616949414473737364646452736473737373647373524973647364732849496449
    L3632213245723248324456613232163252644476326464324932445336641652526444
    N7645604164644457454476444432572157444481327344324432648144444432814476
    P3232363232361656323232321616213232363252214136213636324132162828523644
    T6468886464536176108646464108448864964444885345884421108108112641286464888429
    U7664641046832057?13676888065566064164684413232456841649244881363276647644152
    V56566864576856686845446468326844686868686468683268683268214444448844120
    W5656578488885688446844886432773352883361326884326484448844645632684488
    X2956734973495673297329734968732944444444442929292929737373734929292929
    Y4444446444524464324444444444444432444464444444444441446444323244644444
    Z685644683268446168444444684468446861646844614444108684468444444441089244

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    320 Cells

    Last revised 2026-07-02.


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    George Sicherman [ HOME | MAIL ]