Friday Puzzles #224

I think, Dearest Reader, you'll learn something new when solving this puzzle.  Enjoy!

    #261 Irregular Sudoku – rated hard

All puzzles © Tom Collyer 2009-13.

Friday Puzzles #223

Nothing special this week, classic sudoku.  Keep an eye out for more puzzles from me over at The Art of Puzzles though!

Here are some PDF's.

Week 29
Week 30
Week 31

Week 29 and week 30 aren't done very well, but I've been trying to do them for ages and they were downright impossible.  That's life.

    #260 Sudoku – rated easy

All puzzles © Tom Collyer 2009-13.

Friday Puzzles #222

I've made it to Nelson again, dearest reader, and I've got nothing prepared.  There's a huge backlog of Daily League PDF's in the works - Week 29 has me temporarily beat although 30 and 31 shouldn't be too long in appearing.  Let's see.

Anyway, more extra regions today.  I've always enjoyed playing with the geometry of Sudoku grids by getting rows and columns interacting in more interesting ways than you get in a classic puzzle, and this puzzle illustrates that philosophy nicely.  Sadly this one has lost quite a few of its teeth in trying to get a unique solution, but there's enough meat on this one to keep most of my Dearest Readers entertained for a while.  If you'll excuse that horribly mixed metaphor.  Enjoy!

    #259 Extra Regions Sudoku  – rated medium

All puzzles © Tom Collyer 2009-13.

Friday Puzzles #221

Apparently I was too busy not getting a job in London last week to remember to post a puzzle.  Have no fear, I'll be back with a bang tomorrow!

This week, a quirky Heyawake puzzle, a type I think I haven't revisited for a while.  I was tempted to go wacky on this one to make my original design work, but I think a little perseverance and polish and general puzzling discipline is good for one's authoring abilities.  Under the old system this is certainly hard, but rules is rules and it's not too hard to see where to look to continue your solving path at the sticking points.  Enjoy!

    #258 Heyawake – rated medium

All puzzles © Tom Collyer 2009-13.

Friday Puzzles #220

More daily league.  This is actually solvable (just about!) taking the 4 digits out of box 3 and box 7, but presented as is I think is a more pleasant solve.

PDF's
Week 27
Week 28

Week 29
Saturday (Diagonal, Bram)
Sunday (One From Eight, Seungjae) This is very challenging!!!
PDF (on its way!)

Week 30
Monday (Pairs, Jakub H) Beware the converse rule!
Tuesday (Dominoes, Prasanna)
Wednesday (Frame, Bastien)
Thursday (Even-Anti Knight, Rishi

Enjoy!

    #257 Non Consecutive Sudoku – rated easy

All puzzles © Tom Collyer 2009-13.