Enjoy Sokoban? Enjoy solving Sokoban puzzles?
This might be a place for you. You will occasionally, hopefully often, find a new level or two here.
And you will find other stuff about Sokoban added if the author finds it worthwhile and finds the time.
Title: It’s All Greek – Big Sigma
Comment: Usually big levels are hard to make without flaws. I didn’t find any in this level but that doesn’t necessarily mean there are none. Give it a try.
Skin: Circle by Ariel Rodrigues
Do you feel lucky?
Hope so since there are two acknowledged versions of sigma and you get them both.
Title: It’s All Greek – Sigma 1 and Sigma 2
Date: Sigma 1 2018-03-09, Sigma 2 2018-02-08
Skin: Circle by Ariel Rodrigues. Native skin for Sokoban++
Happy Easter! Time for the Easter Bunny to roam your screen.
Comment: I was in an easter mood a little beforehand.
Skin: Easter by Brian Damgaard
This one is better with one flaw less.Title: It’s All Greek – Chi Remade
Skin: Ancient Greek by Alberto Pettarin
Well. Yesterdays news is yesterdays news and I am probably pretty close to be the only one caring.
Let the past be forgotten and get on with the good stuff.Title: It’s All Greek – Chi
Comment: Took me a long time, but I am sure you can’t solve this level without moving every box. Just got that nagging feeling…and wrong I was. Don’t bother about moving J14.
Skin: Ancient Greek by Alberto Pettarin
Don’t play this level. It got censored!
Once in a while I upload a level to SokobanOnline.com. Presents your level nice up front. Uploaded “Blockhead” with this text: “Study for the center of “It’s All Greek – Chi”. Not published yet. Find it at Sokoban.dk in a not far future. 8 Unnecessary floors just for the look”.
When the level was published the reference to sokoban.dk had disappeared.
I wrote a rather nice “complaint/objection” at the site. Gone after less than an hour. And received a mail I was violating SokobanOnlines terms announcing my website at SokobanOnline. Doing it again I will be expelled.
That’s perfectly okay. Terms stated. I will not violate SokobanOnlines terms anymore.
What is not okay is deleting the “adverticement” and publishing my level anyway without any notice.
So I asked to be expelled right away not needing to do the work to violate the terms once more. Deleting my account AND my levels. Wonder if that will happen.
I think the money and the competition in Sokoban on the net are so negligible that you really shouldn’t worry to support each other.
At least Sokoban.dk is just expenses…
Searching for “Sokoban” at Google you have to read trough 100 or more links to find eg. LetsLogic, Sokoban.dk, Sokoban.ws, YASC…
Better provide a link collection than censorship.
Will give more hits and better ratings to everybody. And better business if you are in Sokoban for the money.
Comment: Study for the center of “It’s All Greek – Chi”. 8 Unnecessary floors just for the look.
Skin: Boxworld Red
2018-03-17 Finding the flaw(s).
Flaw = Box not needed to move to solve a level.
Anian often manages to find flaws in my levels I didn’t find myself constructing them.
In the last version of Big Phi he found 5.
I don’t think it is possible to make this level without flaws with the chosen layout of the goals but I think I can manage better than 5.
Back to the drawing board.
Title: It Is All Greek – Big Phi Probably Final Version
Skin: Aymeric du Peloux
How to find the flaws?
Solve the level and run an optimizer. Anything that doesn’t move?
That’s a method and surely you will find something once in a while depending very much of the solution you found.
Doing a little analyzing you will get closer to a final result.
Doing a lot of analyzing you might get to a final and exhaustive result.
What is absolutely needed to move to solve the level?
A not very advanced analysis reveals it is absolutely necessary to move the black numbered boxes and it might not be necessary to move the blue numbered boxes.
How is that?
You should realise box7 is a keybox. Without moving it you can’t get acces to the middle lower part of the level. Getting acces to box7 you need to move box17 or box22. Box7 need to be moved 2 steps to the left or right (Doesn’t matter which way).
Later in the solving you need to get box7 back to a goal somewhere. To do that you will eventually realise you need acces to both sides of the level.
Forget about the symmetry for the rest of this text. Just decide you will solve the level by moving box17 to get access to box7. Doing this it is obvious you need to move all the boxes box13-box17.
How about the left side? Same thing? Some careful thinking reveals it doesn’t seem to be mandatory to move box26 but then you have to move box21.
Vice versa – You might choose not to move box21 but then it is mandatory to move box26.
Lets have a look at the central column of boxes. A little thinking reveals you need to move all the boxes box1-box6 to get a box at the bottom position and to rebuild the column.
I will leave you to do your own logical thinking at top of the level and eventually you will end up with the above layout.
I found a solution with no need to move box9 and box26 but I think other combinations are possible and maybe with more than 2 flaws.
Any thoughts about the different versions of Big Phi?
I find it interesting constructing levels it is often the simplest looking version that is the hardest to solve.
Never issue a challenge…
Both Anian and Jordi Domenech made totally crap of my level Big Phi and individually showed the level can be solved without moving 13 boxes 😳
The level can be reduced like this:
Title: Big Phi Crippled
Author: DrFogh, Anian and Jordi Domenech
Didn’t feel comfortable by the level anyway. I like this one better:
Title: It Is All Greek – Big Phi New
Two things I am sure about:
At least one box need not to be moved.
You can’t solve the level without moving 13 boxes!
Title: It Is All Greek – BigPhi
Comment: Not my best concerning numbers of boxes not needed to move. At least four. Think you will enjoy the level anyway and tell me if you can solve the level without moving 5 boxes or more.
Skin: Aymeric du Peloux
Comment: I didn’t check if this one is made before but I guarantee it is not. Not difficult. Readers at Sokoban.dk will solve the level without too much effort.
Lots and lots of remade levels.
But seldom reinvented levels.
A reinvented level is a level with a layout so simple that it is possible to believe the author invented it himself/herself and published it even if it was already published by some other author.
It isn’t hard to believe this levels has been reinvented several times:
When the levels are not very symmetrical and when there are about 4 boxes or more, you will most of the time create a brand new level never done before.
I thought so when I published Merry-go-round. I checked the level against my level collection (Bigger than Letslogic or Sokobanonline) and found no match.
Well not an exact match:
But very close. Only the layout of the boxes differs a bit. The solution is basically the same.
Thanks to Jordi Domenech for pointing that out.
And not thanks to myself for only looking for “Exact match” but not “Similar level” with YASCs copyfinder.
(I prefer my layout of the boxes 😎 )
Comment: Sokoban has been around since 1982 and yet nobody created this simple level before.
My work bored me so I made a new level for you instead.
Title: It Is All Greek – Tau
Skin: Pacman by DrFogh
Xi didn’t come out as I wanted. Can be solved with way fewer moves than I thought. And Anian proved the level can be solved without moving at least 7 of the boxes at all.
I really had to remake the level…
Title: Xi Hard – Take That!
Comment: With no boxes unmoved my best solutions are 305/92 and 360/84.
If you manage to solve this level without moving every box I will treat you to a swedish lättöl on any bar of your choice in Copenhagen.
07:30: I owe Anian a lättöl. But at least only one stationary box is possible.
Isn’t it wonderful. Playing around with some walls and boxes and eventually out of nothing you carve a beautiful level.
I had this feeling tinkering around with something not very useful and suddenly the right stuff emerged. Just had to be honed a lot and presto. I got Xi (Big).
The box at [7,4] is just scenery but I think everything else need to be moved. Prove me wrong if I am. (21:46: Another illusion broken. Jordi Domènech just mailed a solution with 2 more boxes not needed to be moved.)
But I am still pleased to announce you have to do all the solving yourself. No solver succeded.
Bricks aren’t blue. Are they? We already got Boxworld Indigo. Now we got Boxworld Red.
Once in a while a new author pops up. Usually making af few levels and then disappearing again.
A few continue to make new levels.
Right now you can enjoy levels by the author Nebula at Game-Sokoban.com
Above Nebula Level 02 published 2018-12-22.
Sokolution managed to solve 14 levels out of 17. But that doesn’t reveal much about the difficulty. Solvers might easily solve levels troublesome for humans and vice versa.
I hope Nebula (She or he? Not many women constructing Sokoban levels) will continue publishing new levels.
First Matthias Meger send me a solution for Omicron where 2 boxes don’t need to be moved.
Then Anian claimed he had a solution where 3 boxes don’t need to be moved. He didn’t send me the solution. Thought it would spoil the fun for me not finding the solution my self…
Didn’t find it yet but redesigned the level.
Try to find any boxes not needed to be moved in the level below!
And no [5,10] doesn’t count. Just a trap to lead you into a cul de sac.
Title: It Is All Greek – Omicron Hard
Skin: Sokofun 1.a. by Laurent Brassard
Title: Nice Cross
Comment: You can use any autosolver but where is the fun then? My best optimized solution 160.
Skin: A classic. Nintendo Boxxle
Did you find another box with no need to move in Omicron? Matthias Meger send me a solution with no need to move two boxes at all. 😕 I will try to be more careful with my levels in the future. 😎
Title: It Is All Greek – Omicron
Comment: You thought it is an O ? Or a 0 ? No ! It is the greek letter Omicron. I think you should challenge yourself but it is easy to cheat since you can just let Takaken do the job. All other noteworthy solvers failed.
One box need not to be moved and if you do you will be in real trouble 😉
Tell me if you can solve the level without moving two boxes.
Skin: Sokofun 1.a. Laurent Brassard made this nice skin with graphics found in the Sokofun program folder. He wrote to me he made 12 skins. Looking forward to see the rest.
If you like Thinking Rabbit (I think you do) you should go to Jordi Domenechs Blog. Jordi remade Thinking Rabbit levels of which many have previously been published in the collections “The Beautiful World of Remodels” and at the Sokoban.org website. Now you get it all in a special collection.
Be ready for a challenge.
New levels? No big issues at the moment except for Archanfel adding lots of remade classics to the collection ABHT 02 at LetsLogic.com. And dont forget Level of The Month at Sokofun.de and The MF8 competition at Sokoban.ws
Title: It Is All Greek – Xi
Comment: You need to move everything. I think
Skin: Matrix by Gerry Wiseman