SCE #1: A Clueless Explosion Nightmare
Posted: Fri Mar 14, 2008 5:01 pm
Here is a Clueless Explosion Nightmare. This one will hopefully have your brain cells screaming and begging for mercy.
HERE is the paper copy.
You get a hint:
I’ll freely admit that after applying all non-advanced techniques (look out for hidden pairs and triplets), I consulted SudoCue. You probably want to concentrate on grid 1. Here SudoCue first suggests "One 3D Medusa Colouring" followed by a "Two almost locked sets" and several "Conflicting forcing chains". After 12 advanced steps you should end up with a “Hidden single for 2”. Thereafter I was able to solve the rest on my own, but it was surly no walk in the park. Look out for several nasty hidden Pairs, hidden Triplets and an X-Wing.
I will do my best to make the next one easier, somewhere between SCE #1 and #2. I have familiarised myself more with SudokuSolver and will turn off some of the most advanced techniques in the solver, like Bowmans Bingo. When SudokuSolver then is able to solve the Clueless Explosion it should hopefully be something more like a Ruud "Very Hard" or a bit more difficult.
Happy solving
Børge
Code: Select all
...............3..2.....1.6.....5........49..7..3.8..4..45.36.2..3......5.6.714..
.................9.....7.36.....5.....6.....3..8.7.964.72.8......4..2....81.63.4.
.................5....1.4.7.8...5..1..3........47.625..3...2..8..2..85...68.531..
..............5..9....1..57..4.........7...........8.3..7.8..9...3..2....82..1.4.
...............5........21......2...........6..1.76.8..3...5.....4...9...97..8..3
............7..........62.7....3............8..8..41...51..3......2.......4..8.2.
.......................932...2..8...........5..64...7............5.....6.98.71...
.................9....491.5..3.........8...........871.5...1..3..47......6....2..
.................7......215.2...5.....4.....8....8........61.8.......9...58..2..4
HERE is the paper copy.
You get a hint:
I’ll freely admit that after applying all non-advanced techniques (look out for hidden pairs and triplets), I consulted SudoCue. You probably want to concentrate on grid 1. Here SudoCue first suggests "One 3D Medusa Colouring" followed by a "Two almost locked sets" and several "Conflicting forcing chains". After 12 advanced steps you should end up with a “Hidden single for 2”. Thereafter I was able to solve the rest on my own, but it was surly no walk in the park. Look out for several nasty hidden Pairs, hidden Triplets and an X-Wing.
I will do my best to make the next one easier, somewhere between SCE #1 and #2. I have familiarised myself more with SudokuSolver and will turn off some of the most advanced techniques in the solver, like Bowmans Bingo. When SudokuSolver then is able to solve the Clueless Explosion it should hopefully be something more like a Ruud "Very Hard" or a bit more difficult.
Happy solving
Børge