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Dawson Station Railroad Shunting Puzzle

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This is an "Ingelnook" type railroad shunting puzzle simulating the operation of my n-scale layout, which is in turn based on the real-life steam powered Hull-Oakes sawmill in Dawson, Oregon. See www.dawson-station.blogspot.com for more info. Operating hint: Drop the red caboose off on the middle spur first! "d" toggles debug button which lets you see variable values. "h" toggles stats display (clock, steps, etc.)
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