Chapter 240: Hidden waybills and open slots
Twenty yards of hidden waybills and open slots
In the dark a car’s waybill is hidden until it has been pulled. Goals still use the true destination, so par allows a look or two.
Outbound patterns can leave slots open to any car, or to a set of destinations. Choosing which car fills a slot cheaply is the puzzle, because the handy one is rarely the right one.
20 yards, pars from 3 to 13 moves. Beside its theme, chapter 240 draws on auto racks, timetables and the hump, with two breathers of plain sorting and extra cars. Difficulty runs as a sawtooth: runs of easy yards, a spike, a breather.
The yards
| # | Yard | Par | The job |
|---|---|---|---|
| 1 | Yard 240.1 | 7 | The outbound any car, Albany, Dover, Dover or Erie, Albany on Track 1, Concord on 2, Boston on 3. Watch for waybills unread until pulled. |
| 2 | Yard 240.2 | 5 | Concord on 1, Dover on 2, Erie on 3, Albany on 4. |
| 3 | Yard 240.3 | 9 | The outbound Concord, Boston, Concord, any car on Track 1, Erie on 2, Albany on 3, Dover on 4. Watch for waybills unread until pulled. |
| 4 | Yard 240.4 | 5 | Concord on 1, Dover on 2, Albany on 3, Erie on 4. Watch for a timetable. |
| 5 | Yard 240.5 | 8 | The outbound Concord, Concord, Albany, Concord or Erie, Albany on Track 1, Dover on 2, Erie on 3, Boston on 4. Watch for waybills unread until pulled. |
| 6 | Yard 240.6 | 9 | The outbound Boston, Boston, Erie, Erie, Boston on Track 1, Dover on 2, Concord on 3, Albany on 4. Watch for a hump yard. |
| 7 | Yard 240.7 | 11 | The outbound Dover, any car, any car, Erie on Track 1, Concord on 2, Albany on 3, Boston on 4. Watch for waybills unread until pulled. |
| 8 | Yard 240.8 | 6 | Concord on 1, Erie on 2, Dover on 3, Boston on 4. |
| 9 | Yard 240.9 | 10 | The outbound Boston, any car, Boston, Boston on Track 1, Dover on 2, Erie on 3, Albany on 4. Watch for waybills unread until pulled. |
| 10 | Yard 240.10 | 6 | Boston on 1, Albany on 2, Dover on 3, Erie on 4. |
| 11 | Yard 240.11 | 10 | The outbound Erie, Erie, Dover, Dover, Boston or Dover on Track 1, Concord on 2, Boston on 3, Albany on 4. Watch for waybills unread until pulled. |
| 12 | Yard 240.12 | 5 | The outbound Dover, Concord, Concord on Track 1, Erie on 2, Boston on 3, Albany on 4. Watch for a hump yard. |
| 13 | Yard 240.13 | 11 | The outbound any car, Albany, Albany or Erie, Dover, Albany on Track 1, Boston on 2, Concord on 3, Erie on 4. Watch for waybills unread until pulled. |
| 14 | Yard 240.14 | 3 | Boston on 1, Erie on 2, Dover on 3, Concord on 4. |
| 15 | Yard 240.15 | 13 | The outbound Dover, Albany or Concord, Dover, Albany on Track 1, Boston on 2, Concord on 3, Erie on 4. Watch for waybills unread until pulled. |
| 16 | Yard 240.16 | 9 | The outbound Albany, Dover, Dover on Track 1, Concord on 2, Boston on 3, Erie on 4. Watch for a timetable. |
| 17 | Yard 240.17 | 13* | The outbound any car, Albany, Albany or Concord on Track 1, Dover on 2, Erie on 3, Concord on 4. Watch for a hump yard, waybills unread until pulled. |
| 18 | Yard 240.18 | 8 | The outbound Boston, Boston, Boston, Albany, Boston on Track 1, Erie on 2, Dover on 3, Concord on 4. Watch for a hump yard. |
| 19 | Yard 240.19 | 12 | The outbound Concord, Dover, Dover, Dover or Erie, Dover on Track 1, Boston on 2, Erie on 3, Albany on 4. Watch for waybills unread until pulled. |
| 20 | Yard 240.20 | 13* | The outbound Albany or Dover, Albany, any car on Track 1, Dover on 2, Boston on 3, Concord on 4. Watch for waybills unread until pulled. |
* A par marked with a star is the best known line for a yard too large to solve outright.
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