Bring 'em On Down

This is one of the new possible maps for Sokoban Level 3 in Nethack Fourk and Level 2 in Hack'EM. It has 19 boulders and 18 holes, leaving 1 spare boulder.

---------------   ----------- 0 boulder
|.............|   |.........| ^ hole
|....0..|0..0.|   |.........| > starting position/downstairs
|.0..----.0.0.|   |.........| < upstairs
|---..........|   |....<....| + door
|..0..0.|0.00.|   |.........|
|.0.....|.....|   |.........|
|...0.---------   |.........|
|.0..0.0.|        |.........|
|.0.0.0..------------------+|
----..>..^^^^^^^^^^^^^^^^^^.|
   --------------------------

Strategy

---------------   ----------- A u
|.............|   |.........| B drrr
|....L..|P..R.|   |.........| D rdrr rrr
|.K..----.Q.S.|   |.........| E rrrd rrrr rr
|---..........|   |....<....| F drrr drrr rrrr
|..I..J.|M.NO.|   |.........| A dddr rrdr rrrr rrr
|.H.....|.....|   |.........| G rddd rrrd rrrr rrrr r
|...G.---------   |.........|
|.F..A.C.|        |.........|
|.E.D.B..------------------+|
----..>..^^^^^^^^^^^^^^^^^^.|
   --------------------------

---------------   ----------- C lldd rrrr rrrr rr
|.............|   |.........| H dddr rrdr rrrr rrrr rr
|....L..|P..R.|   |.........| I rrdd dddr rrrr rrrr rrr
|.K..----.Q.S.|   |.........| J lddd ddrr rrrr rrrr rrr
|---..........|   |....<....| K rrdd dddd rdrr rrrr rrrr rrrr
|..I..J.|M.NO.|   |.........| L lddd dddd rdrr rrrr rrrr rrrr r
|.H.....|.....|   |.........|
|.....---------   |.........|
|......C.|        |.........|
|........------------------+|
----..>........^^^^^^^^^^^^.|
   --------------------------

---------------   ----------- M ulll lldd dddr drrr rrrr rrrr rrrr r
|.............|   |.........| N ulll llll dddd drdr rrrr rrrr rrrr rrrr
|.......|P..R.|   |.........| O ulll llll lddd ddrd rrrr rrrr rrrr rrrr rr
|....----.Q.S.|   |.........| Q dlll llld dddd rdrr rrrr rrrr rrrr rrrr r
|---..........|   |....<....| P ddll llld dddd rdrr rrrr rrrr rrrr rrrr rr
|.......|M.NO.|   |.........| S llld llll lddd ddrd rrrr rrrr rrrr rrrr rrrr r
|.......|.....|   |.........|
|.....---------   |.........|
|........|        |.........|
|........------------------+|
----..>..............^^^^^^.|
   --------------------------