Medium Train Tracks #3

8×8 · Clever · puzzle 3 of 40

Solving notes

This medium grid starts with 4 pieces in place (including A and B), and its route covers 25 of the 64 squares.

Column 8 is 0, so every square there is empty.
Row 8 holds a single track square and B's square is in it, so every other square in that line is empty.
Column 1 holds a single track square and A's square is in it, so every other square in that line is empty.
Counting and the two-connections rule are enough to solve the whole puzzle, all 25 track squares.

Rows are numbered from the top, columns from the left.

Our logic engine solves this puzzle with counting. No parity or “what if” steps are needed. The techniques are explained on the strategy page.

Show the solution (spoiler)

Orange lines are forced connections, dots are squares that must hold track, Xs are squares proven empty.

Stuck? Check shows mistakes for a few seconds, Hint fixes the next square along the route from A, and Solution shows the whole answer.