Timer
00:00:00
Sudoku Sudoku

Help

Submit your own Pic! 8 Comments
Play this pic as a Jigsaw
or Sliding Puzzle
Previous / Next
Play sudoku on your site/blog

                 
                 
                 
                 
                 
                 
                 
                 
                 
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

BREAKING NEWS

Submitted by: uno hu

Indicate which comments you would like to be able to see


just for the record, this is only the second time I've ever been able to complete the Tough puzzle. Please don't burst my bubble by saying it was a particularly easy one...
28/Jan/17 1:02 AM
 |  |
16:43
28/Jan/17 1:31 AM
 |  |
1. Unique possibilities to 28.Note b6c5=78.
2. Whether b6=8;OR d6=8,d1=5=a2;b2=2.UP30.
3. Whether g6=7,g5=1=e4;OR b6=7,d6=8,i6=5=h7,f7=7;e8=8.UP37.
4. Whether b1=4;OR b3=4,b6=7;g6=4.UP81.
28/Jan/17 1:56 AM
 |  |
Same as Alfred's
Standard techniques up 28
1. (5)a2=e2-e4=(5-8)d6=b6-(8=2)b2 =>-2a2 up 30
2. (8=1)e8-e4=d5-(17=8)cg5-b6=(8*-5)d6=i6-i7=(5-7)h7=(7)f7 =>-8df7 up 37
3. (4)b3=hi3-g1=(4-7)g6=(7)b6 =>-7b3 up 81

@Chayote: for this puzzle SE rating is 7.2 (SE acronym of Sudoku More...
28/Jan/17 4:40 AM
 |  |
UP28; 7c5 -> 0 solution; UP81

or, for example :

UP28; L2-Wing[4b3=4b1-4g1=(4-7)g6=7b6]-7b3
Kraken Cell (2678)f7 -> [1g7==1d5==7g5]-1g5; UP81
||2f7-(2=1)g7
||6f7-(6=1)b7-M-Ring[(1=2)g7-2g9=(2-1)d9=*1d7]=*1d5
||7f7-7f3=7c3-7b1=7b6-7g6= 7g5
||8f7-(8=1)e8-1d97=1d5
28/Jan/17 5:42 AM
 |  |
#29 1?@e4=>{d6=5=>b6=8=>c5=7=>g6=7=>g1=4=>b3=4=>f3=7,e8=8=>h2=8=>i7=8=>h7= 5=>f7=7}=>e4<>1
VHBC to #81
V:Only cell left in Vertical column for this candidate
H:Only cell left in Horizontal row for this More...
28/Jan/17 8:15 AM
 |  |
Instead of the Kraken Cell, one can simpler prove the exclusion of 1g5 with the following AIC :

[1d5=1d79-(1=8)e8-8df7=HP(58-7)hi7=7f7-7f3=7c3-7b1=7b6-7g6=7g5]-1g5; UP81
28/Jan/17 10:14 AM
 |  |

OK, Chayote, I won't say it, but...
28/Jan/17 4:11 PM
 |  |
Please Log in to post a comment.

Not a member? Joining is quick and free.
As a member you get heaps of benefits.
Click Here to join.
You can also try the Chatroom (No one chatting right now - why not start something? )
Check out the Sudoku Blog     Subscribe
EasyMediumHardTough
Or try the Kids Sudokus (4x4 & 6x6)
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 Members
Maggie from United States
Aillas from Melbourne
Jane from Sunshine Coast
Member's Birthdays Today
None Today.
Friends currently online
Want to see when your friends are online? Become a member for free.

Network Sites

Melbourne Bars Find the Hidden Bars of Melbourne
Free Crossword Puzzles Play online or print them out. 2 new crosswords daily.
Jigsaw Puzzles Play online jigsaw puzzles for free, with new pictures everyday
Sliding Puzzle Play online with your own photos
Flickr Sudoku Play sudoku with pictures from Flickr
Kakuro Play Kakuro online!
Wordoku Free Wordoku puzzles everyday.
Purely Facts Test your General Knowledge.
Pumpkin Carving Pattern Free halloween pumpkin carving patterns.