Sneak Preview

This is one of the new possible maps for Sokoban Level 2 in Hack'EM. It has 12 boulders of which 11 boulders are accessible and 10 holes, leaving 1 spare boulder.

           ---- 0 boulder
 -----------..| ^ hole
 |..0.^^^^^^..| > starting position/downstairs
 |.--.-------^| < upstairs
--......|...|^| + door
|.......+.0.|^| # sink
|.......|...|^| ≠ iron bars
|-+--.--|≠≠≠-+|
|...|...|.....|
|.0.|.|.|#.<..|
|...|0|.|.....|
----|.0.-----≠|
    |..0...--.|
    |.--0...|.|
    |....0-.|.|
    |.-.-.0.|.|
    |...0..0--|
    -----...0.|
        --.>..|
         ------

Strategy

           ---- A ll
 -----------..| I uuuu uuu
 |..K.^^^^^^..| K rr
 |.--.-------^| I urr
--......|...|^| J uuuu rrru uurr r
|.......+.L.|^| H luuu uuuu uurr rr
|.......|...|^|
|-+--.--|≠≠≠-+|
|...|...|.....|
|.J.|.|.|#.<..|
|...|I|.|.....|
----|.H.-----≠|
    |..G...--.|
    |.--F...|.|
    |....E-.|.|
    |.-.-.D.|.|
    |...A..C--|
    -----...B.|
        --.>..|
         ------

           ---- G rr
 -----------..| F d
 |........^^..| C d
 |.--.-------^| G llll uuuu uuuu uurr rrr
--......|...|^| E uull lluu uuuu uuuu rrrr rr
|.......+.L.|^| F ruul lllu uuuu uuuu urrr rrrr rd
|.......|...|^|
|-+--.--|≠≠≠-+|
|...|...|.....|
|...|.|.|#.<..|
|...|.|.|.....|
----|...-----≠|
    |..G...--.|
    |.--F...|.|
    |....E-.|.|
    |.-.-.D.|.|
    |.A....C--|
    -----...B.|
        --.>..|
         ------

           ---- D luuu llll uuuu uuuu uurr rrrr rrdd
 -----------..| C u
 |............| B llul uuul lllu uuuu uuuu urrr rrrr rddd
 |.--.-------.| A rrru uuul lllu uuuu uuuu urrr rrrr rddd d
--......|...|^|
|.......+.L.|^|
|.......|...|^|
|-+--.--|≠≠≠-+|
|...|...|.....|
|...|.|.|#.<..|
|...|.|.|.....|
----|...-----≠|
    |......--.|
    |.--....|.|
    |.....-.|.|
    |.-.-.D.|.|
    |.A.....--|
    -----..CB.|
        --.>..|
         ------