08 April 2017

Beautiful arrangements: The "Original" collection

I have selected 20 arrangements of the "Original" collection (Spectrum HoloByte, 1988).
 

You can download all puzzles here:






Author: Masato Hiramatsu (Hir)
Title: 閉め出されたラビくん (Mr. Rabbi was shut out)
Set: Arranged levels by Hir #3
Comment: based on Sokoban Revenge (1991) #1 by Seiichi Katsurada
Date: 1998.8.16 (create), 1998.8.21
Difficulty: 6
Best moves/pushes: 448/107

Original arrangement. Is the level of Sokoban Revenge #1 by Seiichi Katsurada, surrounded by an exterior wall, and the player out of the puzzle: it is not easy to enter inside.



Author: anian + Jordi Domènech
Title: Sokoban 30th anniversary 1980-2010
Set: The beautiful world of remodels 1 #27
Comment: integration of the
word "Sokoban" by anian in Original #1
Date: March 2010
URL: sokoban-jd.blogspot.com/2012/03/sokoban-30th-anniversary-1982-2012.html
Difficulty: 5
Best moves/pushes: 828/327 (Findus)

To commemorate the 30th anniversary of Sokoban.



Author: anian + Jordi Domènech + zhenying
Title: Sokoban 30th anniversary 1982-2012
Comment: based on The beautiful world of remodels 1 #27 Sokoban 30th anniversary 1980-2010
Date: March 2010. Remodel: 2012.3.28
URL: blog.163.com/changkai_8428/blog/static/7745191820123643317569/
Difficulty: 6
Best moves/pushes: 509/162 (Findus)

... And the original arrangement of zhenying.



Author: David W. Skinner + Jordi Domènech
Title: Sasquatch XII #22 Original level #1 revised
Set: The beautiful world of remodels 4 #60
Comment: added 3 boxes, stoned 2 floors
Date: February 2012. Remodel: 2012.3.2
Difficulty: 6
Best moves/pushes: 696/272

Just put a little attention in the storage.



Author: Thinking Rabbit + A1master
Title: 1,000,002 candlelights #9 FoRResT House (Thinking Rabbit tribute)
Date: 2014.11.12
Difficulty: 6.5
Best moves/pushes: 430/128 (Tiaoa)

Difficult storage!



Author: Jordi Domènech
Title: Magic Sokoban 6 #21 Original #1 reverse
Date: June 2015
Difficulty: 5.5
Best moves/pushes: 356/115

Well, a reverse version... It is not as easy as it seems :)



Author: Howard Abed
Title: Remodel of original level 15
Set: Fourth Set #34
Comment: based on Original #15, added 9 boxes
Date: c. March 2001
Difficulty: 6
Best moves/pushes: 580/173 (Findus)

GRIGoRusha and zhenying have arrangements of similar difficulty, but perhaps this one of Howard is tighter. See also the elegant arrangement of Sokoban Revenge (1991) #231 by Takahiro Suzushima, with 4 boxes more.



Author: Masato Hiramatsu (Hir)
Title: Sokoban Revenge Level 195 arranged
Set: Arranged levels by Hir #9
First release: Sokoban 2 (1984) #6, then Original (1988) #16, Sokoban Perfect (1989) #216 and Sokoban Revenge (1991) #195
arranged by Masaki Ishino
Comment:
MI: based on SP #216 (= Original #16), stoned 2 floors
Hir: based on SR #195, added 1 box, 1 wall
Date: 1984, 1991. Remodel: 1998.1.9
Difficulty: 6.5
Best moves/pushes: 645/235 

Excellent arrangement! Just add a box and a wall, but it is an entirely different puzzle.



Author: Howard Abed
Title: Remodel of original level 18
Set: Fourth Set #42
Comment: based on Original #18, added 6 boxes
Date: c. March 2001
Difficulty: 6
Best moves/pushes: 707/169 

Tight! As in Original #15 arrangement, Howard chooses to add the greatest number of boxes as possible, without changing the structure.



Author: Thinking Rabbit + Jordi Domènech + anian + Tian Lang
Title: MF8 7th Sokoban Competition (October, 2009) a
Comment:
TL: added 2 boxes, moved 3 goals of the central area and shape the number "七"
Date: 2009.9.30 (MF8 7th Sokoban Competition). Remodel: 2009.10.25 (TL)
URL: bbs.mf8-china.com/viewthread.php?tid=41064&extra=page%3D3
Difficulty: 7.5
Best moves/pushes: 2806/971

The goals of the central area are the Chinese number 七 ("7"). This level is based on Original remixed #20, but rotated counterclockwise as in Sokoban 2 (1984) #10 (= Sokoban Perfect #226).

Puzzle very beautiful and interesting to solve. The biggest difficulty is the closure, with the ingenious change in the location of the goals introduced by Tian Lang.

The level of the MF8 7th Sokoban Competition, easier, is here.



Author: Jordi Domènech
Title: Original remixed #21
Comment: added 4 boxes, major changes
Date: September 2009
Difficulty: 5.5
Best moves/pushes: 464/153

Three different problems.



Author: GRIGoRusha
Title: grigr2001 #78 Original conversion (22)
Comment: added 9 boxes, major changes
Date: December 2001
Difficulty: 6.5
Best moves/pushes: 1764/651 (Sokobano)

Nice storage!



Author: Jordi Domènech
Title: Original remixed #23
Comment: added 9 boxes, rearranged goals
Date: September 2009
Difficulty: 6
Best moves/pushes: 583/229

Change the boxes to the opposite wall. Another classic.



Author: unknown (Thinking Rabbit) + York Shen
Title: Sokoban Perfect #284 a (arr.)
First release: Sokoban 2 (1984) #43; then Original (1988) #29, Sokoban Perfect (1989) #284
Comment: added 1 box
Date: 1984. Remodel: c. 2003
Difficulty: 6.5
Best moves/pushes: 561/203

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 more than 30 arrangements of this classic level (see versions here), but I choose this one 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 :)



Author: David W. Skinner + Jordi Domènech
Title: Microban IV variations #14
Comment: based on Microban IV #46, added 1 box, 3 walls
Date: August 2010. Remodel: 2010.8.31
Difficulty: 6
Best moves/pushes: 347/86

Mini version, but not easy.



Author: Jean-Pierre Kent
Title: Level 24
Comment: inspired in Sokoban Perfect #246 (Original #30 modified)
Date: November 1998
Difficulty: 5.5
Best moves/pushes: 1365/551 (Archanfel)

Simple and nice.



Author: Yoshiki Kondo + zhenying
Title: Sokoban Perfect #224 a
Comment: based on SP #224 (= Original #42), major changes
Date: 1989. Remodel: 2007.12.2
URL: blog.163.com/changkai_8428/blog/static/77451918200852822415514/
Difficulty: 5.5
Best moves/pushes: 731/323

Nice storage.



Author: unknown (Thinking Rabbit) + GRIGoRusha
Title: originalsokoban48c - Thinking Rabbit Original Sokoban level
Set: Remodel Club #31
First release: Sokoban 2 (1984) #2, then Original (1988) #48
Comment: added 1 box
Date: 1984. Remodel: 2003.6.24
Difficulty: 6.5
Best moves/pushes: 494/227 (Wolfgang Haas)

Problem: undo the knot of boxes below.



Author: Howard Abed
Title: Remodel of original level 55
Set: Fourth Set #36
Comment: based on XSokoban #55 (Original #50 arranged), added 4 boxes, some changes
Date: c. March 2001
Difficulty: 5
Best moves/pushes: 738/268

Simple but original.



Author: Lena Pankratova + zhenying
Title: SokoMan 2 #47 a (arr.)
Comment: inspired in Original #50
zhenying: added 1 box
Date: December 1999. Remodel: 2007.1.21
Difficulty: 6
Best moves/pushes: 948/357 

Creative version of Original #50 by Lena Pankratova. I have arranged the map of zhenying's version. SokoMan 2 #50 and 3 #50 are also inspired in Original #50, all of them arranged by zhenying.

02 April 2017

Two good levels, seemingly simple


 ####      ####
 #  ########  ###
 #          *.  #
 # .##### ##    #
 # ##   ###  # ##
 # ##  $ . $ # #
 # ### #.$$ ## #
 # ## $# # ### #
 # ##  # #..## #
 # #        ## #
## #.  ###. ##$#
# *$.########  #
#   $   @    $ #
#############  #
            ####
 

Author: 李金玉 (Li Jinyu)

Title: 旋转餐厅 (Revolving restaurant) - MF8 85th Sokoban Competition, Extra
Date: 2016.5.13
URL: bbs.mf8-china.com/forum.php?mod=viewthread&tid=105483&extra=page%3D1

Best moves/pushes: 1338/358


#######################
#####   #######  ######
#####  *       * ######
###### ########  ######
####   #  ##### #######
#### $ .  ##### #######
#### #### ##### #   ###
#### #### #     $@$ ###
#### #### # ##  #$$ ###
#### ### .#. # ## $ ###
#### ###     # ##   ###
#### ###  #  # ########
###  #########*########
###            ########
#######$#####  ####  ##
#   ### #####        ##
# $$      ########## ##
# $  $   $  ####..## ##
#   ######  ####....  #
##$#######  ####.***$ #
#  #.. ### #######... #
#      ### #######.####
##### ####$$       ####
##### #### ############
#####      ############
#######################


Author: dzxmer + Jordi Domènech + Tui Leshan
Title: dzxmer #28 b arr.
Date: 2017.3.13
URL: bbs.mf8-china.com/forum.php?mod=viewthread&tid=37579&extra=page%3D1&page=129
Best moves/pushes: 3529/695


Note of Jordi Domènech: The original puzzle of dzxmer + Jordi Domènech has been so modified that is unrecognizable. We must therefore consider this excellent puzzle as completely new and original, and in my opinion the author should be exclusively Tui Leshan.


21 March 2017

Sokoban lessons - Beautiful arrangements: Sokoban Perfect

I publish here a small selection of the most beautiful arrangements of "Sokoban Perfect" (1989). 

I exclude the arrangements from the "Original" collection, which I will publish in another post.


You can download all puzzles here:







Author: unknown (Thinking Rabbit) + Jordi Domènech + David Holland
Title: Sokoban Perfect #29 a13
First release: Sokoban 2 (1984) #36; then in Sokoban Perfect (1989).
Comment:
JD: major changes: arranged the whole structure of the map
DH: added 7 boxes
Date: 1984. Remodel: 2010.7.6 (JD), 2010.7.14 (DH)
URL: groups.yahoo.com/neo/groups/sokoban/conversations/topics/3715
Difficulty: 7
Best moves/pushes: 2745/691 (Findus)

You will have to sweat to undo the knot of the central area and place the first box...




Author: Yasuhiro Morita + York Shen + stopheart
Title: Sokoban Perfect #33 (b)
Date: 1989. Remodel: c. 2003 (YS), c. November 2005 (stopheart)
Comment:
YS: added 3 boxes
stopheart: added 4 boxes and changed 2 walls for boxes, stoned 3 floors and added 2 walls
Difficulty: 7
Best moves/pushes: 705/219

Difficult! stopheart has extracted oil from a structure seemingly without possibilities.


See also MF8 29th Sokoban Competition, remodeled by stopheart, more difficult and with a structure very extended.




Author: unknown (Thinking Rabbit) + monry + hir
Title: Sokoban Perfect #64
First release: Namida no Sokoban Special (1986) #40; then in Sokoban Perfect (1989).
Date: 1986. Remodel: 1998.10.24 (monry), 1998.10.27 (hir)
Comment:
monry: added 1 box, two subtle changes at the top and right
hir: added 1 box
Difficulty: 6
Best moves/pushes: 2091/506 (Ficko)

The original level is very beautiful, but without difficulty. The arrangements of monry + hir have given the level an unexpected difficulty.




Author: Yoshiki Kondo + Jordi Domènech + David Holland + minglw + stopheart
Title: Sokoban Perfect #66 d
First release: Namida no Sokoban Special (1986) #42; then in Sokoban Perfect (1989).
Comment:
JD: added 2 boxes, stoned many floors at the top and moved goals to the right
DH: added 1 box, rearranged some goals
minglw: moved 2 goals
stopheart: added 1 box, moved 1 goal
Date: 1986. Remodel: 2010.7.24 (JD, DH), 2010.7.25 (minglw, stopheart)
URL: bbs.mf8-china.com/forum.php?mod=viewthread&tid=37579&extra=&page=26
Difficulty: 7
Best moves/pushes: 566/204

Excellent arrangement achieved between all four authors who participated.




Author: unknown (Thinking Rabbit) + stopheart + Jordi Domènech + zhenying
Title: Sokoban Perfect #68 c1 re
First release: Sokoban (1985, Sega) #70; then in Sokoban Perfect (1989).
Comment:
The versions a and b were made on the same date and independently.
JD (version a): added 1 box, small change in the bottom left, stoned 3 floors in the storage area
stopheart (version b, based on a level posted by anian with 2 more floors): added 6 boxes, stoned 3 floors in the storage area
JD (version c1, based on versions a, b): added 3 boxes, deleted 1 wall
zhenying: stoned 6 floors, moved a box to the storage area
Date: 1985. Remodel: 2010.4.16 (JD, stopheart), 2010.4.24 (zhenying)
URL:
bbs.mf8-china.com/forum.php?mod=viewthread&tid=37579&extra=page%3D1&page=6
blog.163.com/changkai_8428/blog/static/7745191820104112219472/
Difficulty: 6.5
Best moves/pushes: 1668/476 





Author: unknown (Thinking Rabbit) + monry
Title: Sokoban Perfect #79
First release: Namida no Sokoban Special (1986) #68; then in Sokoban Perfect (1989).
Date: 1986. Remodel: 1998.10.24
Comment: added 2 boxes, 1 wall
Difficulty: 5.5
Best moves/pushes: 822/268

Great arrangement. It is not so easy as it seems.




Author: unknown (Thinking Rabbit) + Jordi Domènech + David Holland
Title: Sokoban Perfect #84 c1
First release: Sokoban (1985, Sega) #74; then in Sokoban Perfect (1989).
Comment:
JD: added 1 box, moved 3 walls of the right half to the left half, some changes at the top
DH: added 2 boxes
Date: 1985. Remodel: 2010.8.3
URL: groups.yahoo.com/neo/groups/sokoban/conversations/topics/3870
Difficulty: 8.5
Best moves/pushes: 510/127

Hard! The difficulty of this arrangement is that it forces to keep open the way in the entire circuit, to place the box in the top right. 





Author: Yasuhiro Morita + Přemysl Zíka
Title: Primus gradus ad Olympo 108
Comment:
Sokoban Perfect #103
added 4 boxes, 1 wall, and moved a wall
Date: 1989. Remodel: December 2012
Difficulty: 7 (PZ)
Best moves/pushes: 518/105

A mess...





Author: Hidemitsu Kobayashi + gyjgw
Title: Sokoban Perfect #113
Original title: Classic II 105-b
Comment: added 2 boxes, 1 wall
Date: 1989. Remodel: 2007.9.4
Difficulty: 6.5
Best moves/pushes: 186/57

Great arrangement! With a box of hindrance at the top :)




Author: unknown (Thinking Rabbit) + Jordi Domènech + stopheart
Title: Sokoban Perfect #114 c
First release: Sokoban (1985, Sega) #80; then in Sokoban Perfect (1989).
Comment:
JD: reduced the map
stopheart: added 1 box
Date: 1985. Remodel: 2010.8.20 (JD), 2010.8.21 (stopheart)
URL: groups.yahoo.com/neo/groups/sokoban/conversations/topics/3945
Difficulty: 6.5
Best moves/pushes: 609/144 (ejsantos123)





Author: Yasuhiro Morita + Jordi Domènech + stopheart
Title: Sokoban Perfect #121 b
Comment:
JD: added 2 boxes, 1 wall, deleted many floors in the bottom left
stopheart: added 1 box, moved 2 goals
Date: 1989. Remodel: 2010.8.21 (JD), 2010.8.22 (stopheart)
URL: bbs.mf8-china.com/forum.php?mod=viewthread&tid=37579&extra=page%3D1&page=33
Difficulty: 6.5
Best moves/pushes: 514/166

Excellent arrangement of stopheart, much harder than my version.





Author: Hidemitsu Kobayashi + stopheart + zhenying + York Shen
Title: Sokoban Perfect #127
Comment:
YS: added 1 box
stopheart: added 1 box, moved 4 goals
zhenying: moved 2 goals, deleted 1 wall
YS: changed 1 box for wall
Date: c. 2003 (YS), 2009.11.1 (stopheart), 2009.11.13 (zhenying, YS)
URL:
bbs.mf8-china.com/forum.php?mod=viewthread&tid=37006&extra=page%3D3&page=6
bbs.mf8-china.com/forum.php?mod=viewthread&tid=41993&extra=page%3D2&page=2
Difficulty: 7
Best moves/pushes: 902/261

This is one of the more beautiful levels of Sokoban Perfect. If you prefer a version easier but elegant, I recommend also the mine (The beautiful world of remodels 3 #13), here.





Author: Yasuhiro Morita + Jordi Domènech
Title: Sokoban Perfect #183 b
Set: The beautiful world of remodels 5 #51
Comment: added 2 boxes, stoned 5 floors
Date: 2014.2.12
Difficulty: 6.5
Best moves/pushes: 898/284 (Paul)

Nice level "two rows".





Author: Yasuhiro Morita + York Shen + stopheart
Title: Sokoban Perfect #186
Comment:
YS: added 2 boxes
stopheart: added 4 boxes, changed a box for wall
Date: c. 2003 (YS), c. 2007 (stopheart)
Difficulty: 7
Best moves/pushes: 523/150

Difficult storage!





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

This is another beautiful level of Sokoban Perfect. The version of York Shen only adds a box, but greatly complicates their solution.





Author: Yoshio Sakae + Jordi Domènech + Přemysl Zíka
Title: Sokoban Perfect #202 c
Comment:
JD: added 1 box (goal in L10)
PZ: added 2 boxes
Date: 1989. Remodel: 2011.8.24 (JD), 2014.4.10 (PZ)
URL: www.zusbreznice.cz/rozvrhy-zika-premysl-sokoban-remodeled.cz
Difficulty: 6.5 (PZ)
Best moves/pushes: 3795/1115

Difficult arrangement. Přemysl has found free spaces where there seem to be no. My rating difficulty: 7.





Author: unknown (Thinking Rabbit) + 李金玉 (Li Jinyu) + York Shen
Title: Sokoban Perfect #215 i
First release: Sokoban (1985, Sega) #88; then in Sokoban Perfect (1989).
Comment:
Li Jinyu: moved a goal (file Ljy_369)
YS: enlarge map, added 2 boxes, changed 8 boxes for walls
Date: 1985. Remodel: 2003.12.9 (Li Jinyu), 2003.12.17 (YS)
Difficulty: 7.5
Best moves/pushes: 908/287

Fantastic "diamond"! If you like the chessboards in a diamond shape, this is your level.





Author: Akira Yoshima + Jordi Domènech + stopheart
Title: Sokoban Perfect #217 b arr.
First release: Sokoban 2 (1984) #34; then in Sokoban Perfect (1989).
Comment:
JD: stoned some floors
stopheart: added 4 boxes, some changes
Date: 1984. Remodel: 2011.8.25 (JD), 2011.9.1 (stopheart)
URL: bbs.mf8-china.com/forum.php?mod=viewthread&tid=54431&extra=page%3D1&page=13
Difficulty: 6
Best moves/pushes: 1461/365

Nice arrangement, with a fun captive box.





Author: Yoshio Sakae + Přemysl Zíka
Title: Primus gradus ad Olympo 109
Comment:
Sokoban Perfect #250 a
added 2 boxes, slight changes
Date: 1989. Remodel: December 2012
Difficulty: 7 (PZ)
Best moves/pushes: 397/97





Author: Yoshio Sakae + York Shen
Title: Sokoban Perfect #251 g
Comment: added 9 boxes
Date: 1989. Remodel: c. 2003
Difficulty: 7.5
Best moves/pushes: 440/148

Very tight! Take it calmy...





Author: Masaki Ishino + Jordi Domènech + Přemysl Zíka
Title: Sokoban Perfect #270 c
Comment:
JD: added 3 walls, 3 floors, rearranged goals
PZ: stoned many floors, deleted 1 box, moved 3 goals
Date: 1989. Remodel: 2014.3.16 (JD), 2014.9.28, 2014.10.1 (PZ)
URL: www.zusbreznice.cz/rozvrhy-zika-premysl-sokoban-remodeled.cz
Difficulty: 7.5 (PZ)
Best moves/pushes: 479/132





Author: Yasuhiro Morita + York Shen + zhenying
Title: Sokoban Perfect #278 c
Comment:
YS: added 1 box
zhenying: added 1 wall, moved 2 boxes
Date: 1989. Remodel: c. 2003 (YS), 2006.9.15 (zhenying)
URL: http://blog.163.com/changkai_8428/blog/static/7745191820121121712528/
Difficulty: 7.5
Best moves/pushes: 1616/408

This is one of my favorite arrangements. Difficult storage. This arrangement is almost identical to the previous arrangement of GRIGoRusha (version c, 2004.1.7; see Remodel Club #58): the only difference is that in this version of zhenying has moved a box to I4. Is likely that zhenying did not know the earlier arrangement of GRIGoRusha.





Author: unknown (Thinking Rabbit) + GRIGoRusha
Title: Sokoban Perfect #280 b
First release: Sokoban 2 (1984) #49; then in Sokoban Perfect (1989).
Comment: added 2 boxes, 4 walls
Date: 1984. Remodel: 2004.1.7 (Remodel Club #59)
Difficulty: 7
Best moves/pushes: 3219/1210 (sokobano)

Another classic level of Sokoban Perfect. This arrangement of GRIGoRusha is very tight.





Author: unknown (Thinking Rabbit) + York Shen + zhenying
Title: Sokoban Perfect #302 a-6
First release: Sokoban 2 (1984) #50; then in Sokoban Perfect (1989).
Comment:
YS: added 1 box
zhenying: deleted 1 wall, major changes on top, rearranged 8 goals
Date: 1984. Remodel: 2007.1.27 (YS), 2007.2.3 (zhenying)
URL: blog.163.com/changkai_8428/blog/static/7745191820111194750560/
Difficulty: 7
Best moves/pushes: 3065/984

Original level divided into two parts, and in which we must move the boxes from one part to another. It can be speculated that the author of this excellent level of old look is the same as that of the previous level (SP #302), since they were published consecutively in Sokoban 2 (1984).





Author: Masaki Ishino + York Shen
Title: Sokoban Perfect #306 b-2
Comment: rearranged 9 goals
Date: 1989. Remodel: c. February 2007
Difficulty: 7.5
Best moves/pushes: 8168/1904 (Findus)

It is the last level of Sokoban Perfect and one of the most difficult and arduous to solve in this collection. This version of York Shen change of place 9 goals, which obliges to use the 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).



08 March 2017

First steps

"First steps" is a selection of my puzzles and arrangements for beginners who want to start in Sokoban. I have divided "First steps" in three sets: Beginner, Advanced and Expert.

You can download all puzzles here:
 
First steps (210 puzzles)



First steps - Beginner (100 puzzles)
Since I started building Sokoban puzzles, I have always been enthusiastic about small simple-looking puzzles, but whose solution is not obvious. In this respect, 
I have admired the effort by the simplicity of some Japanese masters: Monry, Nakamiya, Hir... Subsequently, in some collections for beginners of David W. Skinner, Aymeric du Peloux, François Marques, Evgeny Grigoriev and František Pokorný, we also find many little jewels. And more recently, the latest collections of Thomas Reinke are incredibly amazing.

Concerning me, along the years, in them series "Miniatures" and especially "Magic Sokoban" I have gathered several hundreds of small puzzles and arrangements. My aim has been to build simple puzzles and at the same time tricky. If I've managed to build half a dozen puzzles with these two features, I would consider myself very satisfied.

"First steps - Beginner" is a selection of small puzzles of "Magic Sokoban" and other collections for those who start to play Sokoban. Despite their simple appearance, they are not easy: you almost never find the solution on the first try, and you always have to think to solve them.

A tip to learn Sokoban: the most important thing is not to find the solution, but "to understand it". When you solve a puzzle, do not leave it: try to solve it another two more times.

Enjoy!




First steps - Advanced
(80 puzzles)
Is the continuation of the set above. The puzzles are a bit more difficult.



Bonus!




First Steps - Expert (30 puzzles)
Selection of difficult puzzles and remodels. Recommended for experienced players.