Timer 00:00:00 Sudoku Sudoku

## if (sTodaysDate) document.write('Sudoku for ' + sTodaysDate.split('-')[0] + '/' + monthname() + '/' + sTodaysDate.split('-')[2]); else document.write('Enter your own sudoku puzzle.')

Help

Play this pic as a Jigsaw
or Sliding Puzzle
Previous / Next

Choose a number, and place it in the grid above.
 1 2 3 4 5 6 7 8 9
This number is a possibility
 Automatically remove Possibilities Allow incorrect Moves Clicking the playing grid places the current number Highlight Current Square Grey out Used Numbers Possibilities in Grid Format
Check out the latest post in the Sudoku Forum

Welcome to the Sudoku Forums!

Submitted by: Gath

 Indicate which comments you would like to be able to see GeneralJokesOtherSudoku Technique/QuestionRecipes
 Nice photo, Keyan! Clouds never cease to amaze me! So many would be considered unbelievable if you were to paint them in a painting! 03/Feb/09 12:19 AM |  |
 This looks like a nice green place! 03/Feb/09 12:24 AM |  |
 I love it when Keyan checks in from remote corners of the Earth! 03/Feb/09 2:20 AM |  |
 Nice contrast to the picture on hard 03/Feb/09 2:54 AM |  |
 38;41 03/Feb/09 4:40 AM |  |
 1)Start at23,basic techniques to UP=372)(8)c9=(8)c456-(8=1)b6-(1=4)b8-(4)gh8=(4)g9,=>g9<>8.UP=513)(8)b6=b1-g1=h23,=>h 6<>84)(8)g5=(8-2)g6=(2)c6-(2=4)c8-(4)c5=(4)a5,=>a5<>8.UP=81 03/Feb/09 5:33 AM |  |
 Hi Sotir. After pair 36 at e89, I could only get to UP 29. How did you make it to UP 37? 03/Feb/09 8:17 AM |  |
 1) Start at 23 filled. UP to 27.2) (hp36)e89, UP 29.3) locked animals at: (4's)def6, (2's)g46, (2's)ac8, (7's)c456, quad(4578)a1357. UP 37.4) (8)c9 = (8)hi9 - (8=5)i5 - (5)a5 = (5)a7, => a7<>8, c9<>5.5) (4=1)b8 - (1=8)b6 - (8)b7 = (8)c9, => c9<>4. UP More... 03/Feb/09 10:44 AM |  |
 Typo step 6 s/b: - (4=1)b8. 03/Feb/09 10:47 AM |  |
 > 1.5 hours 03/Feb/09 2:36 PM |  |
 I too found an intial fill to 37, though my ultimate solution was not nearly as nice as Sotir's. Noting the 12 pair at a4,8 the 37 fill happen, having applied fills for 1,2,3,6,9. This brings up a question about what you people consider as initial fill. My habit is to fill in particular numbers, More... 03/Feb/09 4:16 PM |  |
 Thanks Dave. I missed the quad in column a. 03/Feb/09 10:17 PM |  |
 Hi Mathman. I think a unique possibility for a cell is one where every other number except for the correct one ,leads to an immediate contradiction.If you need more complex reasoning, like forced chains of 5 and 9, as in your example,you should give your reasoning first, and then call it a UP. 03/Feb/09 10:46 PM |  |
 SE=7.9 09/Sep/10 9:11 PM |  |
 after sotir's step 2 at UP=51, this is more efficient: 3.(8=1)b6-(1=2)a4-c6=g6 => g6<>84.SS(8)b16g15 => h6<>8, UP=81. 10/Jan/11 4:49 AM |  |

Not a member? Joining is quick and free.
As a member you get heaps of benefits.
You can also try the Chatroom (No one chatting right now - why not start something? )
Check out the Sudoku Blog     Subscribe
 Easy Medium Hard Tough Or try the Kids Sudokus (4x4 & 6x6) 16x16 or the Parent's Page.
Printer Friendly versions:
 Members Get Goodies! Become a member and get heaps of stuff, including: stand-alone sudoku game, online solving tools, save your times, smilies and more!
 Welcome our latest Memberselaird from AustinLiz Allison from NSWSpike Jones from Pennsylvania
 Member's Birthdays TodayKaren from Sydney, Snowbird from Carleton Place, ON