Last weekend was the ZeKa competition in Croatia. It featured both a individual and a team competition this year. The individual competition was won by Goran Vodopija; Marko Obradović and Dragan Tolomanoski finished second and third respectively . The team competition was won by Dragan Tolomanoski, Bojana Vojnović and Vanja Fornazar.
I provided one of the Team rounds this time. The theme of the round was Imposters. The round consisted of four classic puzzle types. Each type had 4 puzzles, where one of the puzzles was an Imposter. It wasn't actually solvable as that puzzle type, but was solvable under a different set of rules. The rules of this puzzle was provided. The imposters weren't designed to be logically deduced, but purely intended to break down under the original rules.
The four puzzle types were LITS, with Double Back as imposter; Shikaku, with Corral as imposter; Skyscrapers with Haido as imposter; Slitherlink, with Turning Fences as imposter. Two of these combinations have appeared on my blog as a Double Trouble puzzle. One of them appeared as such on Grant Fikes' blog. The other is probably possible as a Double Trouble puzzle, but haven't tried that yet.
Puzzles can be found below or in the following PDF.
Showing posts with label Double Back. Show all posts
Showing posts with label Double Back. Show all posts
Friday, 14 March 2014
Saturday, 31 December 2011
Puzzle #80: Double Back; Triple Back
Happy New Years Japan, South Korea and the rest of Australia
At least this time I might actually be addressing multiple readers.
For the number 3, Double Back instantly sprang to mind. I had already done it with different numbers in my Four Colour Loop puzzle. I'm not the first to do Triple Back, as it has appeared on Palmer Mebane's blog as well. I like how this one turned out. I think once you get started with this puzzle, it shouldn't cause too many problems.
Draw a single closed loop through all cells in the grid. The loop must pass through each boldly marked region exactly thrice.
At least this time I might actually be addressing multiple readers.
For the number 3, Double Back instantly sprang to mind. I had already done it with different numbers in my Four Colour Loop puzzle. I'm not the first to do Triple Back, as it has appeared on Palmer Mebane's blog as well. I like how this one turned out. I think once you get started with this puzzle, it shouldn't cause too many problems.
3. Double Back; Triple Back
Draw a single closed loop through all cells in the grid. The loop must pass through each boldly marked region exactly thrice.
Monday, 5 December 2011
Puzzle #69: Four Colour Loop
This puzzle is a unique mix of four different genres: Maxi Loop, Liar Loop, Double Back and Country Road. I haven't ever seen genres combined in this way before. I've combined them by using the Four Colour Theorem. This theorem states that when a plane is split up in different regions, you'd only need four different colours to colour all regions without having any regions of the same colour touching by a side.
I'd been thinking of using this for a while, but it was hard to find a good set of puzzle rules that would work in a single puzzle. When I finally had four rules I thought would work, it took a while to even get a solid opening that would get the puzzle going. It took me a long while to get a good puzzle. I had to edit the puzzle a bunch of times as I kept running into mistakes I had made while constructing. I've worked on this puzzle on and off for a few weeks. I hope you all enjoy it. I'm warning you that it isn't easy, but it is completely logically solvable. It will probably take a while to see how the rules interact and what restrictions there are to assign the right rules to the right regions.
Four Colour Loop
General rule:
Draw a single closed loop by connecting the centres of cells horizontally and vertically. The loop doesn't touch or cross itself. The grid is split up into different regions. Each region obeys one of four rules. No two regions with the same rule touch eachother by a side anywhere. They are allowed to touch by a corner.
Region rules:
Country Road:
The loop enters and exits the region once. The number in the region indicates the amount of cells the loop runs through. (Note: This means the loop doesn't run through all cells in the grid)
Double Back:
The loop runs through all cells in the region. The number in the region indicates the amount of the times the loop enters and exits the region.
Liar Loop:
The loop runs through all cells in the region. The number in the region indicates that the loop never runs through this many cells consecutively when traveling through that region. It is always more or less.
Maxi Loop:
The loop runs through all cells in the region. The number in the region indicates the highest amount of cells the loop runs through consecutively when running through this region.
I'd been thinking of using this for a while, but it was hard to find a good set of puzzle rules that would work in a single puzzle. When I finally had four rules I thought would work, it took a while to even get a solid opening that would get the puzzle going. It took me a long while to get a good puzzle. I had to edit the puzzle a bunch of times as I kept running into mistakes I had made while constructing. I've worked on this puzzle on and off for a few weeks. I hope you all enjoy it. I'm warning you that it isn't easy, but it is completely logically solvable. It will probably take a while to see how the rules interact and what restrictions there are to assign the right rules to the right regions.
Four Colour Loop
General rule:
Draw a single closed loop by connecting the centres of cells horizontally and vertically. The loop doesn't touch or cross itself. The grid is split up into different regions. Each region obeys one of four rules. No two regions with the same rule touch eachother by a side anywhere. They are allowed to touch by a corner.
Region rules:
Country Road:
The loop enters and exits the region once. The number in the region indicates the amount of cells the loop runs through. (Note: This means the loop doesn't run through all cells in the grid)
Double Back:
The loop runs through all cells in the region. The number in the region indicates the amount of the times the loop enters and exits the region.
Liar Loop:
The loop runs through all cells in the region. The number in the region indicates that the loop never runs through this many cells consecutively when traveling through that region. It is always more or less.
Maxi Loop:
The loop runs through all cells in the region. The number in the region indicates the highest amount of cells the loop runs through consecutively when running through this region.
 |
| Click to enlarge |
Tuesday, 11 October 2011
Puzzle #30: Double Back
Rules for Double Back
I tried to make this one with larger areas. I think it worked out well. It's hardest in the midle of the solve.
I tried to make this one with larger areas. I think it worked out well. It's hardest in the midle of the solve.
Friday, 16 September 2011
Puzzle #8: Double Back
Rules for Double Back
I haven't really gotten the hang of this genre yet. I like solving them, but constructionwise I still have some problems. Usually this is because the end of my design creates a new opening. I think I minimalised it with this puzzle though.
I haven't really gotten the hang of this genre yet. I like solving them, but constructionwise I still have some problems. Usually this is because the end of my design creates a new opening. I think I minimalised it with this puzzle though.
Rules: Double Back
This genre is devoloped by Palmer Mebane.
Draw a single closed loop through all cells in the grid. The loop must pass through each boldly marked region exactly twice.
Draw a single closed loop through all cells in the grid. The loop must pass through each boldly marked region exactly twice.
Subscribe to:
Posts (Atom)