The basic puzzle is a Shaolin or Gattai-25. In addition, the blue boxes, when combined, form a 26th sudoku. All overlapping regions (yellow and blue) are clueless. As it happens, 22 additional boxes also turned out to be clueless. All 26 constituent puzzles, including the blue one, are Sudoku-X, so the diagonals also need to contain digits 1 through 9.

As for required solving techniques: think singles, locked candidates, pairs and triples, crossovers, simple coloring and XY-Wings in the diagonals.

Please do not post a solution here. Send me a PM with the solution for the blue cells and I'll add you to the "hall of fame" below the puzzle.

Enjoy, Ruud

{ note by Moderator(Pat) —

www.sudokuvault.com/images/clueless-shaolin-x-001.png = broken link;

new image location thanks to enxio27 }

- Code: Select all
`600008300000040002100200070003000020500020900000050700300060000000500000050032000`

700300050204000060000000000000450000000089000040020000000002000000500000000070000

060004005070000206000000000000041000000730000000090070000500000000007000000080000

004800003600090000080002009040000300002080005008040000000020007000004000000650030

000000000000000000000000000000000081104000000000000000000025000000070000000080000

000703000000090000000000000090000060000000000002000300000000000000905000000000000

000000000000000000000000000490000000000000701000000000000360000000040000000090000

004030000001000000000000000270010000005000000008007000000000000000800000000070000

000000000000000000000000000000000000020100000000290840000000000000010000000000000

000000000000000000000000000000000000000007030059038000000000000000060000000000000

000030400000000700000000000000070019000000300000500200000000000000008000000050000

000000000000800000000000000000000000005000000000000000000000000000200000000000000

000802000000000000000904000000000000090000050000000000000406000000000000000309000

000000000000003000000000000000000000000000100000000000000000000000007000000000000

000080000000100000000000000001005000009000000450090000000000000008000000005070000

000000000000050000000000000000830420010500000000000000000000000000000000000000000

000000000000030000000000000046019000000004010000000000000000000000000000000000000

000080000000007000000000000000700900000000400000060035000000000000000500000090700

000060000000080000000094000000000000508000000000000082000000000000000000000000000

000000000000406000000000000007000400000000000080000060000000000000060000000208000

000020000000030000000780000000000000000000902370000000000000000000000000000000000

090061000000200000100040000000080100800070300009000070500900080000020003300005400

000090000000800000000006000030040000000038000000160000000000000307000040600400080

000080000000006000000500000000050010000420000000069000000000000060000402020005001

000160030000004000000090006006050000007040005050000400090003008800070000005400009

Hall of Fame

1. Motris (dec 2, 11:54 GMT)

2. Scott H (jan 27)