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All sudoku puzzles in this forum post are the intellectual property of Børge Alexander Tetlie Anderssen.
Copyright © 2009 Børge Alexander Tetlie Anderssen.  All rights reserved.  Terms of Use.

There are three difficulties to choose from.
All three puzzles have the same solution.

The difficulty levels explained     The ratings explained

A) Novice.
B) Apprentice (mainstream edition).
C) Master (57 Intersection, 3 Naked Pair, 1 Naked Triplet, 1 Uniqueness Test 1 on {47} in g6, 1 XY-Wing on 2 in g5). Select to view details.
The advanced techniques are needed in 2 different grids.



Regular Clueless Special #53A (Novice)

Rating based on required solving techniques:  Moderate

010005007800140000004600900080000000600000020000000090020090005900000003078400010
000500090000000400043609010028000000030000000600000001000008007069000080000300004
001000000309000074000840001200000406800000007007000000030000050000001040018700003
000002070600000300018600000009000010460000003007000090000004000000085100801700050
834000090000061400500080300000000070108000000000000060045000000090502004300090000
000020100800030050063000080090000000000000095300000060600000000020780049080910006
107400000000000920000003007065000090001000000070000400000000005600109042500004000
530000000000002006106730050000000070900000002000000460000000000090400601760805900
004000003000050010200074090000000070800000000700000600040001000050300002080500060



Regular Clueless Special #53B (Apprentice)

Rating based on required solving techniques:  Hard

010005007800140000004600900180000000600000020000000090020090005900000003078400010
000500090000000400043600010028000000030000060600000001000008007069000080000300004
001000000309000074000840001200000406800000007007000000030000050000001040018700003
000002070600000300018000000009000000460000003007000090000004000000085100801700050
834000090000061400500080300000000070108000000000000060045000000090502004300090000
000020100800030050063000080090000000000000005300000060600000008020780049080910006
107400000000000920000023007065000090001000000070000400000000005600109042500004000
530000000000002006100730050000000070900000002000000460000000700090400601760805900
004000003000050010200074090000000070800000000700000600040001000050300002080500061



Regular Clueless Special #53C (Master)

Rating based on required solving techniques:  Super Hard

010005007800140000004600900180000000600000020000000090020090005900008003078400010
000500090000000400043600010028000000030000060600000001000008007069000080000300004
001000000309000074000840001200000406800000007007000000030000050000001040018700003
000002070600000300018000000009000000460000003007000090000004000000085100801700050
034000090000061000500000300000000070108000000000000060045000000090502004300090000
000020100800030050063000080090000000000000005300000060600000008020080049080910006
007400000000000920000003007060000090001000000070000400000000005600109042500004000
500000000000002006106730050000000070900000002000000460000000000090400601760805900
004000003000050010200074090000000070800000000700000600046001000050300002080500060

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