The method you mention here is called retrograde analysis and is e.g. applied to chess endgames. There have been quite some advancements in recent years proving for example a forced mate in 223 (!) moves from any starting position for a six pieces endgame with king, rook and bishop defeating king and two knights.

-- Hofmator

In reply to Re: Looking backwards to GO forwards by Hofmator
in thread Looking backwards to GO forwards by gregor42

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