## Sudoku Cluster

For fans of Killer Sudoku, Samurai Sudoku and other variants

### Re: Sudoku Cluster

HATMAN wrote:Kousha

Richard's site at:
http://www.rcbroughton.co.uk/sudoku/for ... 6dcd994df0

It is the home site for very hard killers named Assassins by Ruud long ago.

Maurice

The URL doesn't work

Posts: 77
Joined: 31 July 2019

### Re: Sudoku Cluster

HATMAN wrote:Richard's site at:
http://www.rcbroughton.co.uk/sudoku/for ... 6dcd994df0
It is the home site for very hard killers named Assassins by Ruud long ago.

I think some part of the url is being lost somewhere.
The Killer Puzzles can be found at: http://www.rcbroughton.co.uk/sudoku/forum/viewforum.php?f=3
.
1to9only

Posts: 2263
Joined: 04 April 2018

### Re: Sudoku Cluster

Cluster Killer 1 Clue-less

Thanks 1to9only

In my solution I found sum placement much more important than sum value - hence Mathimagics' approach would be quite difficult.
This is Kousha's one where I've left out three sum values - but the placement remains. Each ? represents a digit - although I did not use the double digits in my solution.

HATMAN

Posts: 272
Joined: 25 February 2006
Location: Nigeria

### Re: Sudoku Cluster

HATMAN wrote:Cluster Killer 1 Clue-less

Thanks 1to9only

In my solution I found sum placement much more important than sum value - hence Mathimagics' approach would be quite difficult.
This is Kousha's one where I've left out three sum values - but the placement remains. Each ? represents a digit - although I did not use the double digits in my solution.

I see you guys mean, but doesn't it make it complex? the more complex the rules, the less exciting the puzzle, don't you agree?

Posts: 77
Joined: 31 July 2019

### Re: Sudoku Cluster

Certainly the more complex the rules are, the less interest there is, as players will need to fully understand them first.

But apart from that I do not think it matters in terms of puzzle quality.

In this case the question marks did not make the puzzle more difficult. Indeed they have the disadvantage of guiding the solution path to leave them to last.

An advantage cluster killers have over uncaged killers is the mix of cell value solving with boundary placement. It is difficult to create an uncaged killer that is not dominated by boundary placement.

I still suggest you should post this on Richard's assassin site.
HATMAN

Posts: 272
Joined: 25 February 2006
Location: Nigeria

### Re: Sudoku Cluster

HATMAN wrote:Certainly the more complex the rules are, the less interest there is, as players will need to fully understand them first.

But apart from that I do not think it matters in terms of puzzle quality.

In this case the question marks did not make the puzzle more difficult. Indeed they have the disadvantage of guiding the solution path to leave them to last.

An advantage cluster killers have over uncaged killers is the mix of cell value solving with boundary placement. It is difficult to create an uncaged killer that is not dominated by boundary placement.

I still suggest you should post this on Richard's assassin site.

Hatman,

I did try to register, (http://www.rcbroughton.co.uk/sudoku/for ... e=register), it's asking for a registration key for which you need to email reg@piarina.com, which I did; but never got a response ,

Long story short, I couldn't register,

Posts: 77
Joined: 31 July 2019

### Re: Sudoku Cluster

koushanejad74 wrote:I did try to register, (http://www.rcbroughton.co.uk/sudoku/for ... e=register), it's asking for a registration key for which you need to email reg@piarina.com, which I did; but never got a response ,

Long story short, I couldn't register,
I would give it more time before giving up. Richard's last visit to the forum was 27 October so my guess is that he will respond at some stage. The last new member was our own Mathimagics back in January.

tarek

tarek

Posts: 3748
Joined: 05 January 2006

Previous