Sokoban Level 3a

This version of the third level of sokoban has 16 boulders and 11 pits.

0 boulder
^ pit
@ starting position/downstairs
< upstairs

-------- 
---.|....| 
|...0....|---------- 
|.-.00-00|.|.......| 
|.00-......|.......| 
|.-..0.|...|.......| 
|....-0--0-|...<...| 
|..00..0...|.......| 
|.--...|...|.......| 
|....-0|---|.......| 
---..0.-----------+| 
  |..0@^^^^^^^^^^^.| 
  ------------------

Strategy

The following solution solves the level without putting any blocks in an immobile position. Faster solutions which do not necessarily leave every boulder free might exist. You can watch a video of this solution.

All boulders are replaced by letters so they can be referred to. Moving the boulders is shortened to r for right, l for left, u for up, d for down. An asterisk is used to denote the last move filled a pit (and thus removed the boulder from the game). So Nddrr* means move boulder N two times down and two times to the right into a pit.

First clear up the lower part of the room. The opening move is the only one possible. Make sure you move the O boulder out of the way when finishing the L boulder:

--------
---.|....|
|...A....|---------- O ll
|.-.BC-DE|.|.......| P rr*
|.FG-......|.......| N ddrr*
|.-..H.|...|.......| L ddd
|....-I--J-|...<...| O u
|..KL..M...|.......| L rrdr rr*
|.--...|...|.......| O rddr rrrr r*
|....-N|---|.......| K rddd drrr rrrr*
---..O.-----------+|
  |..P@^^^^^^^^^^^.|
  ------------------

Clear the upper left corner, boulders G and F. Now enter the small room in the middle and finish boulder M. Then enter the room just above J and finish I and H:

--------
---.|....|
|...A....|---------- G dddr dddd rrrr rrrr*
|.-.BC-DE|.|.......| F rddd rddd drrr rrrr rr*
|.FG-......|.......| M rrll llld dddr rrrr rrrr r*
|.-..H.|...|.......| J uu
|....-I--J-|...<...| I dddd drrr rrrr rr*
|......M...|.......| H rddd dddr rrrr rrrr r*
|.--...|...|.......| 
|....-.|---|.......| 
---....-----------+|
  |...@.....^^^^^^.|
  ------------------

Enter the top room through A and push C out:

-------- 
---.|....| 
|...A....|---------- A rr 
|.-.BC-DE|.|.......| C ddrd dddd drrr rrrr rrrr* 
|...-....J.|.......|  
|.-....|...|.......|  
|....-.--.-|...<...|  
|..........|.......|  
|.--...|...|.......| 
|....-.|---|.......| 
---....-----------+| 
  |...@..........^.| 
  ------------------

The level is now finished. All boulders can still be moved around freely and should be checked for wands or rings.

--------
---.|....|
|.....A..|----------
|.-.B.-DE|.|.......|
|...-....J.|.......|
|.-....|...|.......|
|....-.--.-|...<...|
|..........|.......|
|.--...|...|.......|
|....-.|---|.......|
---....-----------+|
  |...@............|
  ------------------

Next level

After this level, you will face either of the following levels:

Sokoban Level 4a (with a bag of holding) -------------------------- |@......^^^^^^^^^^^^^^^^.| |.......----------------.| -------.------ |.| |...........| |.| |.0.0.0.0.0.| |.| --------.----| |.| |...0.0..0.0.| |.| |...0........| |.| -----.-------- ------|.| |..0.0.0...| --|.....|.| |.....0....| |.+.....|.| |.0.0...0.-- |-|.....|.| -------.---- |.+.....+.| |..0.....| |-|.....|-- |........| |.+.....| |...------ --|.....| ----- -------

Sokoban Level 4b (with an amulet of reflection) ------------------------ |..^^^^^^^^^^^^^^^^^^..| |..-------------------.| ----.| ----- |.| |..|0-- --...| |.| |.....|--|.0..| |.| |.00..|..|..0.| |.| --..00|...00.-- |.| |0..0...|0..| ------|.| |.00.|..|..0| --|.....|.| |.0.0---|.0.| |.+.....|.| |.......|..-- |-|.....|.| ----.0..|.-- |.+.....+.| ---.--.| |-|.....|-- |.0...| |.+.....| |@.|..| --|.....| ------- -------