Sokoban Level 4b

This is one of the last levels of sokoban. Behind the holes is a zoo with in one of the three doors a treasure, an amulet of reflection. There are 20 boulders and 18 holes.

0 boulder ^ pit @ starting position/downstairs < upstairs

|..^^^^^^^^^^^^^^^^^^..|  |..---.| .|    -        |.| |..|0--  --...|        |.| |.....|--|.0..|        |.| |.00..|..|..0.|        |.| --..00|...00.--        |.|  |0..0...|0..|   --|.|  |.00.|..|..0| --|.....|.|  |.0.0---|.0.| |.+.....|.|  |.......|..-- |-|.....|.|  .0..|.--  |.+.....+.|     ---.--.|   |-|.....|--      |.0...|   |.+.....|      |@.|..|   --|.....|      ---     ---

Strategy
The general strategy for this level is to enter through the right room into the middle of the left room. There the boulders should be organized precisely so that the left room can be cleared.

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. |..^^^^^^^^^^^^^^^^^^..|  |..---.| .|    -        |.| |..|A--  --...|        |.| |.....|--|.B..|       |.| |.CD..|..|..E.|       |.| --..FG|...HI.--       |.| |J..K...|L..|  --|.| |.MN.|..|..0| --|.....|.| |.P.Q---|.R.| |.+.....|.| |.......|..-- |-|.....|.| .S..|.--  |.+.....+.| ---.--.|  |-|.....|--      |.T...|   |.+.....| |@.|..|  --|.....|      ---     ---

The general strategy for this level is to enter through the right room into the middle of the left room. There the boulders should be organized precisely so that the left room can be cleared.

At first the T boulder should be pushed into the right room, because the entrance above the T should stay clear. Trrruuuu In the right room Ru Ouu Iu Hlll

|..^^^^^^^^^^^^^^^^^^..|  |..---.| .|    -        |.| |..|A--  --...|        |.| |.....|--|.B..|       |.| |.CD..|..|.IE.|       |.| --..FG|H@...O--       |.| |J..K...|L..|  --|.| |.MN.|..|.R.| --|.....|.| |.P.Q---|T..| |.+.....|.| |.......|..-- |-|.....|.| .S..|.--  |.+.....+.| ---.--.|  |-|.....|--      |.....|   |.+.....|      |>.|..|   --|.....|      ---     --- In the left room align the boulders to form a 2x3 area in which you are able to turn boulders around. These moves are the most crucial to successfully finishing this level. Kll Nd Fu Gu

|..^^^^^^^^^^^^^^^^^^..|  |..---.| .|    -        |.| |..|A--  --...|        |.| |.....|--|.B..|       |.| |.CDFG|..|.IE.|       |.| --....|H....O--       |.| |JK@....|L..|  --|.| |.M..|..|.R.| --|.....|.| |.PNQ---|T..| |.+.....|.| |.......|..-- |-|.....|.| .S..|.--  |.+.....+.| ---.--.|  |-|.....|--      |.....|   |.+.....|      |>.|..|   --|.....|      ---     ---

Finish boulder A by moving C around. Cud Auuur* Finish F through the 2x3 area and clear C and D. Fdduuuuuuurr* Cu Druuuuurrr* Crruuuurrrr*

|....@.^^^^^^^^^^^^^^..|  |..---.| .|    -        |.| |..|.--  --...|        |.| |.....|--|.B..|        |.| |....G|..|.IE.|       |.| --....|H....O--       |.| |JK.....|L..|  --|.| |.M..|..|.R.| --|.....|.| |.PNQ---|T..| |.+.....|.| |.......|..-- |-|.....|.| .S..|.--  |.+.....+.| ---.--.|  |-|.....|--      |.....|   |.+.....|      |>.|..|   --|.....|      ---     --- Clear the rest of the left room. Nuuuuuuuuurrrrr* Pruuuuuuuuurrrrrr* Mruuuuuuuurrrrrrr* Kuuuruuuurrrrrrrr* Juuurruuuurrrrrrrrr*

|.........@.^^^^^^^^^..|  |..---.| .|    -        |.| |..|.--  --...|        |.| |.....|--|.B..|        |.| |....G|..|.IE.|       |.| --....|H....O--       |.| |.......|L..|  --|.| |....|..|.R.| --|.....|.| |...Q---|T..| |.+.....|.| |.......|..-- |-|.....|.| .S..|.--  |.+.....+.| ---.--.|  |-|.....|--      |.....|   |.+.....|      |>.|..|   --|.....|      ---     --- Now it is possible to either clear the remaining boulders in the left room, or continue with the middle and right room. Hdllluuuuuuurrrrrrrrrr* Rd Lullldllluuuuuuurrrrrrrrrrr* Tuuullldllluuuuuuurrrrrrrrrrrr* Note that to move T we must pass to the north opening of the small room with the stairs. Rluuullldllluuuuuuurrrrrrrrrrrrr* Br Idddluullldllluuuuuuurrrrrrrrrrrrrr* Elldllldllluuuuuuurrrrrrrrrrrrrrr* Bdlldllldllluuuuuuurrrrrrrrrrrrrrrr* Gddluuuuuuurrrrrrrrrrrrrrrrr* Quuluuuuuuurrrrrrrrrrrrrrrrrr*

|......................|  |..---.| .|    -        |.| |..|.--  --...|        |.| |.....|--|....|        |.| |.....|..|....|        |.| --....|.....O--        |.| |.......|...|  --|.|  |....|..|...| --|.....|.|  |....---|...| |.+.....|.|  |.......|..-- |-|.....|.|  .S..|.--  |.+.....+@| ---.--.|  |-|.....|--      |.....|   |.+.....|      |>.|..|   --|.....|      ---     ---