Design and Copyright : William Hu (2013).
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| Pieces | 4 | A-D are congruent. |
| Selection | identical | |
| Goal | 6×6×8 | |
| Holes | 56 | |
| Solutions | 1 / 1 | |
| Moves | 9.2.2 |
CCCCCB | CBBBBB | ACBCBC | ACCCCC | AAACCC | DAAAAA | DDADAA | DDDDAA AAAACB | C....D | CC.BBB | A.C..B | AAACCC | DDAAAC | D....A | D....A ADDACB | C....D | ACCB.D | A.CBBB | AAACCC | DDDACC | B.DA.C | B....A ADBCCB | C....D | C.ADDB | AAAD.B | DDDBBB | DDBCCC | D.BC.A | B....A ADBBBB | C....D | AAA.DD | A..D.B | DDDBBB | DBBBCC | B....C | B....C ADDDDD | AAAAAD | DADADB | DDDDDB | DDDBBB | BBBBBC | BBCBCC | BBCCCC1.
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