Adsgoplay / reasoning

Work Backward From the Exit

Ask which neighbor can legally enter the goal.

The idea Trace the last move backward. If only one adjacent square reaches the exit, the previous position is fixed before the first move is made.

Try it on Switchpath Open the board and pause before one move. Ask which neighbor can legally enter the goal. Say what you expect the next state to be, then make the move and compare it with the board.

A useful check For work backward from the exit, track your position, the two switch states, and remaining moves separately. A blocked move does not consume a turn; entering a switch does. Reset whenever you want to test another route.

Source boundary The game rules are original to Adsgoplay. The W3C source supports keyboard interface practice, not the puzzle solution or a claim about learning outcomes.