Sudoku - 9x9, 6x6 and Killer Samurai Sudoku
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What is Sudoku?
Sudoku is a Number Puzzle that requires no mathematical knowledge. (no adding or multiplication). It is based upon Japanese style crosswords where you are required to use logic to place numbers onto a 9x9 grid.Rules
To solve the puzzle you must make sure that every column, row and 3x3 box contains the numbers 1 through to 9.
Almost all of the puzzles can be solved using logic alone and there is no need to guess. A puzzle can take from 20 minutes to 2 hours to complete depending on its level and your experience.
People have developed a range of methods and tactics in order to solve the puzzles.
Killer Sudoku
Another interesting variation of Sudoku that will test your logic skills. Killer Sudoku follows the same sudoku rules except you are given clues in the form of totals for a group of boxes which will give clues from which you can deduce the numbers.
Try Killer Samurai Sudoku:
5 interconnected Killer Sudoku Puzzles in Colour.
Killer Sudoku 1 and Solution - Download
The Sudoku Puzzles that were orignally here have now been removed. They can be found at: http://www.timesonline.co.uk/article/0,,7-1757275,00.html
Solutions for all Times Killer Sudoku Puzzles in the link above - Download
36 Comments
| 1) | man, these are rock hard! I'm struggling on the tricky one at the moment....25 mins - you must be joking!! good luck people Comment by: Matt. Made on the 08th Sep 2005. |
| 2) | Just done the gentle and the moderate so far. Very tricky stuff, so easy to go wrong too! But oh so good! Comment by: Doogie. Made on the 08th Sep 2005. |
| 3) | The only combination Sum Number Place(Killer Su Doku) www7a.biglobe.ne.jp/~sumnumberplace/index.html from Japan Comment by: Miyuki. Made on the 09th Sep 2005. |
| 4) | Just a point which I don't think is made clear. I assumed that within a "dotted" box the same number can't be duplicated. (Possible if the box crosses a 3x3 boundary and is not a straight line!) In other words the only possibilty for a 3 square dog-legged box summing to 23 is 9,8,6 but 8,7,8 is not allowed. Any ideas? Comment by: Brendan. Made on the 10th Sep 2005. |
| 5) | Whoops!!! Just looked at the link in comment 3. Under the "How to Play" section it confirms my hypothesis in my previous comment. This is not made clear in the Times. Sorry! Comment by: Brendan. Made on the 10th Sep 2005. |
| 6) | Sorry, One of rules was not made clear in the Times. We did not notice. Thank you for teaching. Comment by: Miyuki. Made on the 13th Sep 2005. |
| 7) | I was struggling with Killer no. 7 in the Times until I read the interview with the Japanese creator which implied this rule (he said that there was only 1 way to make 24 in a 3 box "sum" - thus 9+8+7 which ruled out 9+6+9 ). Once I realised this it became a lot easier. Andy Comment by: Andy Owen. Made on the 13th Sep 2005. |
| 8) | Is there a solution available to the Deadly Killer? I thought I had it only to have made a small mistake somewhere! Comment by: Argon0. Made on the 15th Sep 2005. |
| 9) | Never mind - worked it out! Made a mistake in bottom left hand corner! Comment by: Argon0. Made on the 15th Sep 2005. |
| 10) | Wow! I love sudoku but i ADORE killer sudoku! my mate gave me one as a joke and i completed it, whos laughing now, lol! im an A level student currently but i love taking breaks from my work and doing killer sudoku, its taken sudoku to a whole new level! thank you! Comment by: Hannah Carey. Made on the 15th Sep 2005. |
| 11) | Can somebody acctually solve sudoku killer moderate,time:20 minutes in that time? It took us hours, but we succeeded. and we enjoyed it! Comment by: monika. Made on the 17th Sep 2005. |
| 12) | I am finding the Killer sudoku easier than the normal sudoku.Am I a geek?? A good clue is that each block adds up to 45 Comment by: karin. Made on the 17th Sep 2005. |
| 13) | Good idea ! I think the given times are very short. One thing is not clear in rules : can we duplicate a nomber in a total (forgive my english)? Comment by: Pascal. Made on the 18th Sep 2005. |
| 14) | Thanks for pointing out the rule that the times forgot to mention. I thought I was going mad as even the easy ones seemed impossible! Comment by: Jo. Made on the 20th Sep 2005. |
| 15) | please help me i thought i was good at killer sudoku.. i do all the times puzzles but i am stuck on the tricky one of your killer ... are there answers anywhere Comment by: Cindy. Made on the 23rd Sep 2005. |
| 16) | Thank you for putting Killer Sudoku online. Yours are much harder than those on Times, but entertaining and challenging ... Will you be posting more? Comment by: Jim. Made on the 26th Sep 2005. |
| 17) | pls tell me where i can find answer to tricky.. ill pay you! Comment by: cindy. Made on the 26th Sep 2005. |
| 18) | In The Times Killer Sudoku book puzzle 91 in tough section seems to contradict the unwritten rule of unique numbers in the groupings i.e. there is a grouping of 3 with total of 26 which must be 9,8,9 and in same puzzle a grouping of 3 totalling 8 which turn out to be 2,4,2 (more frustrating as I was temporarily led astray). Only one I am aware of and their examples implicitly assume the rule. Comment by: lawrence. Made on the 06th Oct 2005. |
| 19) | Karin is right in her comment back in September - Killer is easier in a way than ordinary Sudoku. I think the easy puzzles are much easier than easy ordinary Sudoku, but maybe the harder Killers are harder than the hard Sudokus. Anyway, I'm not sure it's about how hard it is: once you have all the techniques it's about application and concentration. That doesn't make it less good though. Comment by: Cathers Rose. Made on the 12th Oct 2005. |
| 20) | I also noticed the problem with puzzle 91. It's a mistake and if you note the contributer at the front it's the only puzzle that he contributed. Comment by: wendy. Made on the 18th Oct 2005. |
| 21) | Mistake in the Tricky sudoku makes the puzzel truely impossible although obviously so. 6th line from top two box's of two side by side add up to 17!! this would require the only solution be to replicate within a square the number 8 or 9, don't know how long this site has been around but you would have thought this would be an easy pick up Comment by: kitty. Made on the 19th Oct 2005. |
| 22) | Kitty you need to take a look at the tricky one again. One of the 17s has 2 boxes but the other has 3! Comment by: David. Made on the 19th Oct 2005. |
| 23) | www.killer-sudoku.com the definitive Solver for sudoku killers. Comment by: Jose. Made on the 26th Oct 2005. |
| 24) | New Sum Number Place (Killer Su Doku) variation. Sum's figures not at all. www7a.biglobe.ne.jp/~sumnumberplace/ Comment by: Miyuki. Made on the 30th Oct 2005. |
| 25) | how do u start off on a killer sudoku when there r none of the dotted boxes with just one number??im a bit confused!thanks :-) Comment by: sally. Made on the 30th Oct 2005. |
| 26) | Hello Sally. This is a question a lot of begginers ask. Its quite easy really. If you look at the killer sudoku puzzle above you will see the three larger boxes on the far left column. All there dotted line totals are inside those 3 boxes except 1. Which is leaking into the bottom middle box. Now all we do is a simple bit of elimination. We know that the 3 boxs on the left should total up to 45*3=135. However if you add up all the dotted line totals it will equal 144. Therfore the dotted line totalling to 15 with the square leaking into the bottom middle box must be 144-135=9. You have then just found your first answer. Hope that helps Comment by: Daniel (Site Owner). Made on the 30th Oct 2005. |
| 27) | All about sudoku games at http://www.sudoku.ya.st Thank you for your killers samurais Comment by: sudokume. Made on the 04th Nov 2005. |
| 28) | Thank you for giving us the killer!!! My work collegues used to tease me when I started at sudoku, but now they're all hooked and I've moved on to killer! It's the best way to relax your mind! Please post some more killers! Yours are the best! Comment by: Filipa. Made on the 06th Nov 2005. |
| 29) | it is like great dude Comment by: babe. Made on the 11th Nov 2005. |
| 30) | where can i play it online i cant find it where is it no actually where am i love ya x Comment by: ice. Made on the 11th Nov 2005. |
| 31) | Sudokus are very very fun and brain storming! They are also very challenging Comment by: Sam. Made on the 28th Nov 2005. |
| 32) | you can find a sudoku killer solver made with Java on www.sudoku.org.es . Still is a beta version, this means it will work fine when you select the cells correctly, otherwise ... Comment by: elibm. Made on the 30th Nov 2005. |
| 33) | I made an italian reference for killer sudoku at my site www.killersudoku.it with schemas (given by Djape) to be completed, solving tips and curiosities. Thank you for the killer samurai, they're unique and interestingly addicited... Comment by: teostress. Made on the 25th Dec 2005. |
| 34) | that's great!! Comment by: sutlu. Made on the 28th Dec 2005. |
| 35) | You can also play killer sudoku directly online at www.killersudokuonline.com Comment by: Seth. Made on the 06th Jan 2006. |
| 36) | That Killer Samurai Sudoku was fun. But is it not breaking the rules having TWO 5 digits in sum 20 (green area in rows 8 & 9 in the top-left grid)? Comment by: Peter. Made on the 30th May 2006. |
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