Turning Train II [solution]

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1. Train goes past the siding to the right (Step 1), backs the caboose into the siding (Step 2) and uncouples the caboose.

2. The engine (and attached railcar) comes out of the siding to the right (Step 3), backs past the siding towards Edmonton (Step 4), goes forward into the siding (Step 5) and pulls the caboose out (Step 6). The caboose is now facing the correct way but the engine and railcar are not.

3. The engine (and railcar) pushes the caboose past the siding to the right (Step 7), uncouples the caboose, and the engine backs the railcar into the siding (Step 8) and uncouples.

4. The engine comes out of the siding to the right (Step 9), backs past the siding towards Edmonton (Step 10), goes forward into the siding (Step 11) and pulls the railcar out (Step 12). The caboose and the railcar are now facing the correct way but the engine isnít.

5. The engine pushes the railcar past the siding to the right (Step 13), making it coupling with the caboose, then decouples, and backs into the siding (Step 14).

6. The engine leaves the siding towards Edmonton (Step 15) - it is now facing the correct way - and backs up and connects with the railcar (Step 16). Now the train is successfully heading towards Edmonton (Step 17).

Posted: December 11, 2007
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