01 March 2014

Sokoban lessons - Storage: Two rows

The golden age of storage puzzles is that of Thinking Rabbit. In the collections of Thinking Rabbit, virtually we found all the possible problems of storage. Thus, it is not surprising that of the 21 puzzles chosen here, 7 are of Thinking Rabbit. And, in my opinion, between the creators who collaborated with Thinking Rabbit, two stand out: Hidemitsu Kobayashi and Yoshio Sakae.

"Two rows" (or columns) is a special case of storage, which has a particular interest. In this post I publish some of the puzzles "two rows" that I like most. With these characteristics:

- At least 10 goals (5+5 goals). I reserve the "eights" (4+4) for a specific post.
- The storage area must be surrounded by walls. Maximum number of entrances that connect the storage area with the rest of the puzzle = 30 %. The
entrances must be non adjacent (I have done some exception to the latter condition).
- There may be other areas of storage in the puzzle, but the theme "two rows" has to be the main.

You can download all puzzles (except commercial) here:
 




Author: unknown (Thinking Rabbit) + York Shen
Title: Sokoban Perfect #284 a (arr.)
Comment: added 1 box
First release of the original level: 倉庫番2 (Sokoban 2; Thinking Rabbit, 1984) #43, and then Soko-Ban (Spectrum HoloByte, 1988) #29
Date: February 1984. Remodel: c. 2003
Difficulty: 6.5
Best moves/pushes: 681/213


This is the first level "two rows" of Sokoban and also the first in which they are used unequivocally rooms with sliding boxes. There are 29 remodels of this puzzle (see all versions here), but I choose this version of York Shen, with a box more, which greatly increases the difficulty. I've slightly arranged the map (upper-left corner). The arrangement is also valid for the original level :)

About the rooms with sliding boxes
The difficulty of this level is that it is possible to circulate from North to South, but not from the South to the North: the sliding boxes in the rooms at the four corners (marked in red, see image below), obstruct the passage of S-N. To move from South to North there is no other way to go through the storage area... :(   Thus, to solve this level, we must first remove the 2 sliding boxes (marked in red) on one side of the level (in this case, we will remove the 2 boxes on the left side). Conclusion: in the levels with rooms and sliding boxes, first need to study very well the circulation pathways. 





 



Author: unknown (Thinking Rabbit) + York Shen
Title: Sokoban Perfect #234 a
Comment: added 2 boxes
First release of the original level: 倉庫番2 (Sokoban 2; Thinking Rabbit, 1984) #44
Date:
February 1984. Remodel: c. 2003
Difficulty: 6.5
Best moves/pushes: 4049/1082


"Two rows" in right angle. The unknown author of this excellent level, might be the same as Sokoban Perfect #284 (= Original #29, see above the previous puzzle), because both were published consecutively in Sokoban 2 (1984), levels #43 and #44 respectively. The version of York Shen (+2 boxes) is of similar difficulty to the original. 




Author: Hidemitsu Kobayashi + York Shen
Title: Sokoban Perfect #192 a
Comment: added 1 box
Date: 1989. Remodel: c. 2003
Difficulty: 6.5
Best moves/pushes: 2073/620

York Shen added a box, which significantly increases the difficulty. See also of Hidemitsu Kobayashi: Sokoban Perfect #253 (below), and Sokoban Revenge #264.




Author: Akira Yoshima + Jordi Doménech + stopheart
Title: Sokoban Perfect #217 b
Comment:
stoned many floors - J.D.
added 4 boxes, some changes - stopheart
Date: 1989. Remodel: 2011.8.25, and 2011.9.1
Difficulty: 7
Best moves/pushes: 1459/363

The version of stopheart, with 4 more boxes, is rather more difficult than the original. Stopheart has made some changes in the structure, especially at the top, where he has built a double room with a captive box. This funny "mechanism" allows the passage in both directions, N-S and S-N, conveniently changing the position of the box (up/down in the double room). See also this mechanism in the level of Vipul Patel, below (Sokodeal #55).




Author: Hidemitsu Kobayashi
Title: Sokoban Perfect #253
Date: 1989
Difficulty: 6.5
Best moves/pushes: 1648/673


This level has two major difficulties: 1) take out the first box of the right area... 2) but the biggest difficulty is how to place the boxes in the cargo area (left). Warning: small trap in the storage area (I bet you have to repeat this level...). There is no remodels of this level, and the reason is simple: is not possible to add a single box or wall. 




Author: Masaki Ishino + York Shen
Title: Sokoban Perfect #306 b-2
Date: 1989. Remodel: c. 2003
Difficulty: 7.5
Best moves/pushes: 8266/1900


It is the last level of Sokoban Perfect and one of the most difficult and arduous to solve in this collection. The version of York Shen change of place 9 goals, which obliges to use storage area for storing some boxes on an interim basis, and forced to move the boxes by two rows of the storage area (exits out a box at the bottom, comes inside another box above).




Author: Yoshio Sakae
Title: Sokoban Revenge #145
Date: 1991
Difficulty: 6.5
Best moves/pushes: 577/160

Masterly! It's my favorite level. See other puzzles "two rows" of Yoshio Sakae:
Sokoban Perfect #88 (simple and nice), Sokoban Revenge #140, #147, and #152 (remodel of Sokoban Perfect #196).





Author: monry
Title: monry-light #41 2列のくせに易しい
Date: 1998.10.29
Difficulty: 6
Best moves/pushes: 260/59

Genial! Another of my favorite puzzles from always.





Author: monry
Title: monry-light #96 ありきたりの2列(超)
Date: 1998.12.17
Difficulty: 6.5
Best moves/pushes: 856/198

Puzzle simple looking, but you have to put elbows on the table to find the solution.




Author: Jean-Pierre Kent
Title: JPK Levels #45
Date: November 1988
Website: sokoban-jd.blogspot.com/2012/10/my-favorite-authors-jean-pierre-kent.html
Difficulty: 6
Best moves/pushes: 1747/750 (
yutaka yamada)

Nice level, with storage area occupying the entire central area, and loading areas at the top and bottom.





Author: Jean-Pierre Kent
Title: JPK Levels #47
Date: November 1988
Website: sokoban-jd.blogspot.com/2012/10/my-favorite-authors-jean-pierre-kent.html
Difficulty: 6
Best moves/pushes: 1181/386 (Sokobano)

"Two rows" angled and circulation around. Reminds Sokoban Perfect #234
(see above).



Author: Jean-Pierre Kent + York Shen
Title: JPK Levels #68 b
Comment: moved 2 goals
Date: November 1998. Remodel: c. 2003
Website: sokoban-jd.blogspot.com/2012/10/my-favorite-authors-jean-pierre-kent.html
Difficulty: 7
Best moves/pushes: 2389/850

Spectacular "two rows" in "S". I publish the version of York Shen, more difficult.





Author: Jean-Pierre Kent
Title: JPK Levels #74
Date: November 1988
Website: sokoban-jd.blogspot.com/2012/10/my-favorite-authors-jean-pierre-kent.html
Difficulty: 6.5
Best moves/pushes: 801/276

It's not easy...
The entire puzzle is a veritable maze of rooms chained. You'll have to think a little to find a way to solve it ;)   See also of Jean-Pierre Kent, level 59, remodel of Sokoban Revenge #152.




Author: ZiKo (Zbigniew Kornaś)
Title: Stage #014
Date: 2.5.2000
Difficulty: 7.5
Best moves/pushes: 994/286

Hard! A classic and beatiful storage problem in two rows.





Author: David Holland
Title: dh1 #8 Salamandar v3
Date: October 2000
Difficulty: 6.5
Best moves/pushes: 796/226

Excellent! The solution is not obvious.





Author: Shaggath
Title: Mulholland D #23 arr.
Date: September 2007
Difficulty: 6
Best moves/pushes: 363/99

Fantastic! This is the puzzle that all storage specialists would like build.





Author: Vipul Patel
Title: Sokodeal #55 arr.
Date: September 2008
Difficulty: 6.5
Best moves/pushes: 3102/696

Spectacular and fun. I've taken the liberty to arrange the map, eliminating the ugly double inner walls. Another interesting levels: Sokodeal #1 (with remodels of zhenying, difficult, and minglw), #18 (funny), #25, #43 and #44.





Author: Vipul Patel
Title: Sokophobia #9
Date: December 2008
Difficulty: 7
Best moves/pushes: 2672/579

Fantastic level! Before moving any box, you should think very carefully how to load the
storage area.




Author: Aleksey Krupenko
Title: Sonic - Room 6
Date: March 2012
Difficulty: 5.5
Best moves/pushes: 437/93

Tricky!





Author: Aleksey Krupenko
Title: Sonic - Room 23
Date: 2012.5.16
Difficulty: 6
Best moves/pushes: 1119/470

The biggest difficulty is how to place the boxes in the cargo area (left). Other interesting levels "two rows" of Aleksey Krupenko: #11, #14 (nice storage problem), #36 (excellent, although the difficulty is just place the first box...), #38 (easy but nice), #47, #53.





Author: Sven Egevad
Title: SE 1907
Comment: assemble hard
Date: November 2013
Website: www.egevad.nu/sven/
Difficulty: 5.5
Best moves/pushes: 956/281

Witty and funny.




In addition to the levels above-mentioned, see also:

- Péter Asztalos
    AKK Informatika #16

- Jordi Doménech
    Miniatures - Part Two #13 
    SokoStation variations #10 
    The beautiful world of remodels 3 #7

- Hir (Masato Hiramatsu) 
    #9 Ten to sen, #14 Nagai fumikiri
    Arranged levels #5

- Marcus Hof
    Revenge 22 #2

- David Holland 
    dh1 #4, #5 Pattern-oster

- Kenyam #3

- monry #25

- monry + hir
    monry-light #14 (d)

- Kevin B. Reilly 237, 372, 420, 481, 642

- Thomas Reinke + gyjgw
    TBox5 #1 a

- Keijo Sopuli
    KEAS Collection #11 Keas

- Eric F. Tchong 
    Atlas 1 #11, 2 #70, 7 #63-65, 8 #15
    Chuchubi 5 #14 

- Thinking Rabbit 
    Sokoban Perfect #88 (Yoshio Sakae), #183 (Yasuhiro Morita), #245, #295 (unknown + Masaki Ishino), #302
    Sokoban Revenge #153 (unknown + Seiichi Katsurada)  

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