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PostPosted: Fri Apr 04, 2014 12:53 am 
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Grand Master
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Joined: Wed Apr 23, 2008 6:04 pm
Posts: 1893
Location: Lethbridge, Alberta, Canada
Clueless Explosion Archive - Ruud's Puzzles      Image


This is an archive of Ruud's Clueless Explosion puzzles and solutions, which were originally posted on sudocue.net from 2006 to 2008. The ratings are those quoted by Ruud when he posted his puzzles.

For those who aren’t familiar with Clueless Explosions, the 81 blue cells form an extra Sudoku grid. This form of Sudoku is called Clueless because the blue cells don’t include any numbers (clues).

There are diagrams for each puzzle and solution. Alternatively, if you are using a software solver, there are code strings. If you are using SudokuSolver first select File, Puzzle Type -> Extended; then in the Puzzle Type drop down menu below the right-hand diagram select Clueless Explosion. Now Select the Code String and Copy and Paste into SudokuSolver. Other software solvers will have similar procedures. Edit. I've now found that there's a simpler way using SudokuSolver. Select File, Import, Explosion, copy and paste the code string into the new window that opens and click OK.

There wasn't a specific Clueless Explosion guide, but Ruud's Clueless Special guide may give useful hints about how to get started.


Puzzle rating table, with links to archive entries.

At Ed's suggestion, I've added SudokuSolver(v3.6) scores to the table.

A score of 0.85 indicates that SS solved these puzzles using hidden singles and box/line intersections,
scores of 0.95 and 1.00 are when SS used hidden singles, hidden pairs and box/line intersections,
higher scores indicate the use of harder techniques.

+-----------------------+------------+-------+     +-----------------------+------------+-------+
| Puzzle | Rating | Score | | Puzzle | Rating | Score |
+-----------------------+------------+-------+ +-----------------------+------------+-------+
| Clueless Explosion 1 | Moderate | 1.00 | | Clueless Explosion 10 | Hard | 0.90 |
| Clueless Explosion 2 | Hard | 1.05 | | Clueless Explosion 11 | Tough | 1.05 |
| Clueless Explosion 3 | Very Hard | 1.00 | | Clueless Explosion 12 | Tough | 1.15 |
| Clueless Explosion 4 | Hard | 1.10 | | Clueless Explosion 13 | Hard | 0.95 |
| Clueless Explosion 5 | Hard | 1.05 | | Clueless Explosion 14 | Moderate | 1.05 |
| Clueless Explosion 6 | Very Hard | 1.00 | | Clueless Explosion 15 | Hard | 0.90 |
| Clueless Explosion 7 | Very Hard | 1.15 | | Clueless Explosion 16 | Tough | 1.05 |
| Clueless Explosion 8 | Hard | 1.05 | | Clueless Explosion 17 | Hard | 1.05 |
| Clueless Explosion 9 | Very Hard | 1.05 | | Clueless Explosion 18 | Very Hard | 1.00 |
| | | | | Clueless Explosion 19 | Tough | 1.05 |
+-----------------------+------------+-------+ +-----------------------+------------+-------+
Page #1 Page #2

+-----------------------+------------+-------+     +-----------------------+------------+-------+
| Puzzle | Rating | Score | | Puzzle | Rating | Score |
+-----------------------+------------+-------+ +-----------------------+------------+-------+
| Clueless Explosion 20 | Hard | 1.05 | | Clueless Explosion 30 | Very Hard | 2.10 |
| Clueless Explosion 21 | Very Hard | 1.05 | | Clueless Explosion 31 | Hard | 1.10 |
| Clueless Explosion 22 | Tough | 1.05 | | Clueless Explosion 32 | Hard | 1.15 |
| Clueless Explosion 23 | Very Hard | 1.45 | | Clueless Explosion 33 | Hard | 1.15 |
| Clueless Explosion 24 | Hard | 1.10 | | Clueless Explosion 34 | Very Hard | 1.10 |
| Clueless Explosion 25 | Tough | 1.00 | | Clueless Explosion 35 | Hard | 1.50 |
| Clueless Explosion 26 | Hard | 1.10 | | Clueless Explosion 36 | Hard | 1.15 |
| Clueless Explosion 27 | Tough | 1.10 | | Clueless Explosion 37 | Very Hard | 1.60 |
| Clueless Explosion 28 | Moderate | 1.20 | | Clueless Explosion 38 | Hard | 1.10 |
| Clueless Explosion 29 | Hard | 1.05 | | Clueless Explosion 39 | Hard | 1.00 |
+-----------------------+------------+-------+ +-----------------------+------------+-------+
Page #3 Page #4

+-----------------------+------------+-------+     +-----------------------+------------+-------+
| Puzzle | Rating | Score | | Puzzle | Rating | Score |
+-----------------------+------------+-------+ +-----------------------+------------+-------+
| Clueless Explosion 40 | Tough | 1.05 | | Clueless Explosion 50 | Hard | 1.05 |
| Clueless Explosion 41 | Moderate | 1.00 | | Clueless Explosion 51 | Hard | 1.05 |
| Clueless Explosion 42 | Hard | 1.10 | | Clueless Explosion 52 | Tough | 1.05 |
| Clueless Explosion 43 | Tough | 1.00 | | Clueless Explosion 53 | Very Hard | 1.25 |
| Clueless Explosion 44 | Hard | 1.00 | | Clueless Explosion 54 | Tough | 1.05 |
| Clueless Explosion 45 | Very Hard | 1.05 | | Clueless Explosion 55 | Moderate | 1.05 |
| Clueless Explosion 46 | Very Hard | 1.15 | | Clueless Explosion 56 | Tough | 1.10 |
| Clueless Explosion 47 | Tough | 1.00 | | Clueless Explosion 57 | Very Hard | 1.30 |
| Clueless Explosion 48 | Tough | 1.00 | | Clueless Explosion 58 | Very Hard | 1.05 |
| Clueless Explosion 49 | Tough | 1.00 | | Clueless Explosion 59 | Very Hard | 1.25 |
+-----------------------+------------+-------+ +-----------------------+------------+-------+
Page #5 Page #6

+-----------------------+------------+-------+     +-----------------------+------------+-------+
| Puzzle | Rating | Score | | Puzzle | Rating | Score |
+-----------------------+------------+-------+ +-----------------------+------------+-------+
| Clueless Explosion 60 | Tough | 1.05 | | Clueless Explosion 70 | Hard | 1.15 |
| Clueless Explosion 61 | Very Hard | 1.15 | | Clueless Explosion 71 | Very Hard | 1.30 |
| Clueless Explosion 62 | Tough | 0.95 | | Clueless Explosion 72 | Tough | 0.95 |
| Clueless Explosion 63 | Very Hard | 1.50 | | Clueless Explosion 73 | Moderate | 1.00 |
| Clueless Explosion 64 | Tough | 1.10 | | Clueless Explosion 74 | Tough | 0.95 |
| Clueless Explosion 65 | Hard | 0.90 | | Clueless Explosion 75 | Hard | 1.05 |
| Clueless Explosion 66 | Tough | 1.05 | | Clueless Explosion 76 | Tough | 1.00 |
| Clueless Explosion 67 | Very Hard | 1.10 | | Clueless Explosion 77 | Hard | 1.00 |
| Clueless Explosion 68 | Hard | 1.05 | | Clueless Explosion 78 | Tough | 0.95 |
| Clueless Explosion 69 | Tough | 1.00 | | Clueless Explosion 79 | Very Hard | 1.00 |
+-----------------------+------------+-------+ +-----------------------+------------+-------+
Page #7 Page #8

+-----------------------+------------+-------+
| Puzzle | Rating | Score |
+-----------------------+------------+-------+
| Clueless Explosion 80 | Hard | 1.00 |
| Clueless Explosion 81 | Tough | 1.05 |
| Clueless Explosion 82 | Very Hard | 1.05 |
| Clueless Explosion 83 | Tough | 1.05 |
| Clueless Explosion 84 | Tough | 1.05 |
| Clueless Explosion 85 | Tough | 1.10 |
+-----------------------+------------+-------+
Page #9


Roll of Honour

Ruud wrote:
For each correct Clueless Explosion, you earn 1 point.
Note: To enable new players to catch up with the regulars, only the last 26 Clueless Explosions will included in the score.

On Ruud's website, players with 26 points were shown with a gold medal, those with 25 points a silver medal and a bronze medal for those with 23 points.

+----+-------+--------------------------+-------------+-------+
| | Medal | Player | Country | Score |
+----+-------+--------------------------+-------------+-------+
| 1 | G | Nouggie | USA | 26 |
| 2 | G | PeteTy | USA | 26 |
| 3 | G | Brian Rothery | Sweden | 26 |
| 4 | B | Byron Okamoto | USA | 26 |
| 5 | G | Tomas Kollen | USA | 26 |
| 6 | G | slowhand | Brazil | 26 |
| 7 | G | Don Parker | USA | 26 |
| 8 | G | Børge T. Anderssen | Norway | 26 |
| 9 | G | lynn893 | Canada | 26 |
| 10 | G | Hans Schmitten | Germany | 26 |
| 11 | G | Susan | USA | 26 |
| 12 | G | Susan Warner | Sweden | 26 |
| 13 | G | Ria Tettelaar | Netherlands | 26 |
| 14 | G | jsmif | USA | 26 |
| 15 | G | Ron Cain | USA | 26 |
| 16 | S | Glyn | UK | 25 |
| 17 | S | Gemma | Netherlands | 25 |
| 18 | S | Marlie | Netherlands | 25 |
| 19 | S | Jason McNary | USA | 25 |
| 20 | S | Yuri Joubert | Germany | 25 |
| 21 | B | Julie Stuckmeyer | USA | 23 |
| 22 | B | sarah | USA | 23 |
| 23 | | Khunangkaro | Thailand- | 22 |
| | | | Nederland | |
| 24 | | Oscar | México | 21 |
| 25 | | Nasenbaer | Germany | 21 |
| 26 | | sheila | USA | 20 |
| 27 | | Neil Sinclair | Canada | 19 |
| 28 | | Danamario | Canada | 15 |
| 29 | | Thomas Jaspers | Netherlands | 15 |
| 30 | | Caida | Canada | 13 |
| 31 | | Miss Universum | Germany | 13 |
| 32 | | Yian Annette Chien | Taiwan | 9 |
| 33 | | Gina Hines | USA | 7 |
| 34 | | Steve Powers | USA | 7 |
| 35 | | Robin Cutler | USA | 6 |
| 36 | | Chris Robinson | Australia | 4 |
| 37 | | John Pushnik | USA | 4 |
| 38 | | Pierre-Hugues Carmichael | Canada | 3 |
| 39 | | DianaB | USA | 3 |
| 40 | | MaryG | USA | 3 |
| 41 | | T O'D | USA | 1 |
| 42 | | Para | Netherlands | 1 |
| 43 | | MARLIE | Netherlands | 1 |
| 44 | | sheila | USA | 1 |
| 45 | | Marilyn | UK | 1 |
+----+-------+--------------------------+-------------+-------+


+--------------------+-------+---------+---------+
| Country | Score | Players | Average |
+--------------------+-------+---------+---------+
| USA | 331 | 20 | 16.6 |
| Netherlands | 93 | 6 | 15.5 |
| Germany | 85 | 4 | 21.3 |
| Canada | 76 | 5 | 15.2 |
| Sweden | 52 | 2 | 26.0 |
| Norway | 26 | 1 | 26.0 |
| UK | 26 | 2 | 13.0 |
| Brazil | 26 | 1 | 26.0 |
| Thailand-Nederland | 22 | 1 | 22.0 |
| México | 21 | 1 | 21.0 |
| Taiwan | 9 | 1 | 9.0 |
| Australia | 4 | 1 | 4.0 |
+--------------------+-------+---------+---------+

There was also a list for each of the last 26 puzzles of the order in which correct solutions were submitted. There were between 25 and 34 correct solutions submitted for each of these puzzles.


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PostPosted: Fri Apr 04, 2014 1:37 am 
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Grand Master
Grand Master

Joined: Wed Apr 23, 2008 6:04 pm
Posts: 1893
Location: Lethbridge, Alberta, Canada
Clueless Explosion 1
15th July 2006 Moderate

Puzzle Diagram:
Image
Code: Select, Copy & Paste into solver, set for puzzle type Clueless Explosion:
900000003005000100080104090004080500000302000008010200010807050007000400800000007
700000002008000700060409080002060800000507000005090100020306010006000300500000008
200000006001000200060209080005090300000307000008020400090108030007000900100000008
600000001005000400090106050006030100000504000007060800060208030002000700400000006
200000009001000800040801050003010400000304000005080200010905020002000900300000004
500000004008000500060705010005070800000203000002040300050308020006000100100000007
700000009001000600090102080006030900000608000007050300030804070002000800400000005
500000001008000400020509080003020600000406000007090800060208070005000900400000003
400000001006000800030804070008050100000908000009040300020507010003000700600000009
Solution:
Image


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PostPosted: Fri Apr 04, 2014 1:40 am 
Offline
Grand Master
Grand Master

Joined: Wed Apr 23, 2008 6:04 pm
Posts: 1893
Location: Lethbridge, Alberta, Canada
Clueless Explosion 2
22nd July 2006 Hard

Puzzle Diagram:
Image
Code: Select, Copy & Paste into solver, set for puzzle type Clueless Explosion:
090508010600000008008040300900000005000102000700000006009050800800000003010803040
020305080500000003001020600700000001000503000200000008003040900100000004090108070
060807050800000002001040900400000005000901000300000008005070100700000003090205070
060105030300000006001060400700000001000703000400000003003090100200000004010408070
050908030300000007006050800500000003000407000800000004005070300600000005030506090
040509030500000008007060400900000005000401000700000004009050800800000009030908040
040706010800000004006010500300000002000208000600000008002030900500000007080902050
090307060700000002001050700400000006000901000200000007003080600500000009060502070
050801070400000002006040500500000007000703000300000009005090700900000006060102090
Solution:
Image


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PostPosted: Fri Apr 04, 2014 1:43 am 
Offline
Grand Master
Grand Master

Joined: Wed Apr 23, 2008 6:04 pm
Posts: 1893
Location: Lethbridge, Alberta, Canada
Clueless Explosion 3
29th July 2006 Very Hard

Puzzle Diagram:
Image
Code: Select, Copy & Paste into solver, set for puzzle type Clueless Explosion:
300000002008000400060000080000804000000000000007000100070408060900000007001307500
200000007001000500030000080000904000000000000009000700020609010700000009005302800
700000006006000900090000020000205000000000000009000200070501080800000004001903700
600000004003000100050000060000804000000000000005000200020507030300000002009103700
100000005009000700060000030000406000000000000007000500030204090400000001002301600
300000008002000500040000060000209000000000000005000100010302070700000001004507800
700000004002000100010000090000809000000000000003000600080307010300000005009506200
400000008008000700060000020000104000000000000005000200010506030200000001003201600
200000007003000200070000040000605000000000000001000300060309020400000008005107400
Solution:
Image


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PostPosted: Fri Apr 04, 2014 1:46 am 
Offline
Grand Master
Grand Master

Joined: Wed Apr 23, 2008 6:04 pm
Posts: 1893
Location: Lethbridge, Alberta, Canada
Clueless Explosion 4
5th August 2006 Hard

Puzzle Diagram:
Image
Code: Select, Copy & Paste into solver, set for puzzle type Clueless Explosion:
050020010001000900000109000800000005003000200700000004000405000008000500030090040
020070040001000700000406000500000004004000800900000001000709000005000200090080030
030090010007000900000602000700000009002000500600000007000801000004000300070060020
040050030005000900000607000800000009002000400300000002000402000001000200090080070
030050070002000800000302000300000002007000600100000004000804000008000100090070060
050060090009000200000301000300000001001000700500000004000805000005000300070010080
040080070009000300000607000300000008007000500500000007000103000008000600020060010
060090080008000400000803000200000004007000600600000009000502000003000200080030070
060080030005000700000502000600000003003000200800000006000104000008000100020050090
Solution:
Image


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PostPosted: Fri Apr 04, 2014 1:48 am 
Offline
Grand Master
Grand Master

Joined: Wed Apr 23, 2008 6:04 pm
Posts: 1893
Location: Lethbridge, Alberta, Canada
Clueless Explosion 5
12th August 2006 Hard

Puzzle Diagram:
Image
Code: Select, Copy & Paste into solver, set for puzzle type Clueless Explosion:
000602000003000600040000080300407006000000000200106007020000070004000100000208000
000109000005000400070000090900307001000000000400605002040000050006000900000408000
000708000009000300080000040100506003000000000700103008070000010001000800000607000
000406000008000600050000080500803007000000000700105004040000010006000300000309000
000605000003000400090000080700908003000000000600301002030000090005000700000807000
000105000006000100070000090600401003000000000400809006080000020003000500000204000
000709000007000600080000030100408006000000000300907008020000060004000800000103000
000904000002000800050000030200306007000000000400208005010000050003000200000501000
000507000007000900060000050600309004000000000400802007040000020003000500000601000
Solution:
Image


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PostPosted: Fri Apr 04, 2014 1:50 am 
Offline
Grand Master
Grand Master

Joined: Wed Apr 23, 2008 6:04 pm
Posts: 1893
Location: Lethbridge, Alberta, Canada
Clueless Explosion 6
19th August 2006 Very Hard

Puzzle Diagram:
Image
Code: Select, Copy & Paste into solver, set for puzzle type Clueless Explosion:
000401000009000300070020010800903004006000500040602080008040700000000000400508006
000406000002000400070020060800701002007000600030602090009030100000000000700209003
000904000009000300030050080700408005004000100050103070005070800000000000600309002
000705000007000400030010070300807005002000700080102030003020800000000000200601009
000508000005000700020010030400609005008000900090203040003020400000000000900301007
000501000001000900040090020800209007007000800090107060004060200000000000200803004
000501000005000300020090060300609004006000700010704080001040800000000000600908003
000307000001000700020040090300908006006000800050203010009070500000000000100506007
000308000007000400080040030500809001009000300020504090008020600000000000400706003
Solution:
Image


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PostPosted: Fri Apr 04, 2014 1:52 am 
Offline
Grand Master
Grand Master

Joined: Wed Apr 23, 2008 6:04 pm
Posts: 1893
Location: Lethbridge, Alberta, Canada
Clueless Explosion 7
26th August 2006 Very Hard

Puzzle Diagram:
Image
Code: Select, Copy & Paste into solver, set for puzzle type Clueless Explosion:
010000020000902000200000008002060900500000007004050800100000006000405000030000090
010000090000806000200000007004030100100000004005010800800000009000407000060000050
050000070000705000100000006003080400500000002006070300800000001000608000040000050
020000060000803000500000007008010600400000005002050300700000003000907000060000040
030000010000901000100000002003020900200000005009040100400000008000504000060000030
020000080000807000500000009002090300100000004006050800900000006000304000070000030
090000070000806000300000004009010500200000001004030900700000002000405000050000090
090000080000408000500000006003050800700000009005070100100000002000602000070000090
070000080000704000500000003002030100800000004007010900200000007000205000090000020
Solution:
Image


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PostPosted: Fri Apr 04, 2014 1:55 am 
Offline
Grand Master
Grand Master

Joined: Wed Apr 23, 2008 6:04 pm
Posts: 1893
Location: Lethbridge, Alberta, Canada
Clueless Explosion 8
2nd September 2006 Hard

Puzzle Diagram:
Image
Code: Select, Copy & Paste into solver, set for puzzle type Clueless Explosion:
300000600000006000006800405050009030000000000090100020204003900000200000001000002
800000200000007000009100306050008040000000000040300020907005800000800000004000002
900000100000008000006900305040002030000000000060100090205009400000400000004000001
200000600000009000009600208040007060000000000070200050806003900000800000001000004
100000900000002000009600802050001070000000000090800040602008700000100000007000004
400000800000007000002900503050003020000000000090500030305001600000200000001000008
400000900000006000005100803060004050000000000090500010709005100000300000006000007
200000300000005000005700108020009030000000000040600010902003700000800000008000001
600000800000008000009600502090004080000000000070100020801002600000500000007000009
Solution:
Image


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PostPosted: Fri Apr 04, 2014 1:58 am 
Offline
Grand Master
Grand Master

Joined: Wed Apr 23, 2008 6:04 pm
Posts: 1893
Location: Lethbridge, Alberta, Canada
Clueless Explosion 9
9th September 2006 Very Hard

Puzzle Diagram:
Image
Code: Select, Copy & Paste into solver, set for puzzle type Clueless Explosion:
006003040300000500080500009600080100000401000009060003200008090004000001050900600
003006080400000100060700003900030700000108000006020004500003090002000008090800200
003006080200000900090700006100060800000504000002070005900007050005000001020300400
008004010200000800040800002400010700000709000007060009900001050004000008020900300
005006010900000500010400007500090100000203000009070008400007090007000002080900700
008003010300000400050900006600080500000504000004090007100002070009000002030600100
009003070800000200010900003300040900000201000001030002200006010006000009090400600
008004060600000300070300009500080900000705000007090001700008010005000004020500800
005004080700000600080300002800030100000701000009020003600007030008000001090800200
Solution:
Image


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