Setup and opening position
Two endpoint cells are fixed as track, and eight side totals describe four row counts and four column counts. Other cells begin undecided as track or empty.
Tracks Puzzle
Create one connected path between the two marked endpoints with no branches or separate loops while satisfying all row and column track totals.
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How to play
Create one connected path between the two marked endpoints with no branches or separate loops while satisfying all row and column track totals.
- Two endpoint cells are fixed as track, and eight side totals describe four row counts and four column counts. Other cells begin undecided as track or empty.
- Mark an editable cell as track or empty, or clear it. In the completion, track cells connect only orthogonally, internal cells have degree two, and endpoints degree one.
- Create one connected path between the two marked endpoints with no branches or separate loops while satisfying all row and column track totals.
Strategy tips
- Fill any row or column whose remaining quota equals its undecided cells, mark excess cells empty when a quota is met, and protect degree-two path continuity.
- Matching every side total can still leave a detached loop or a branch; totals, connectivity, and the degree of every track cell are independent requirements.
- Before joining the last segments, verify that the connection produces one endpoint-to-endpoint path rather than closing a loop that strands another required track cell.
Complete guide
Rules, scoring, and strategy
Tracks Puzzle is a complete browser implementation with its own versioned rules profile. Draw one nonbranching railway through a four-by-four grid between fixed endpoints while matching the exact number of track cells in every row and column.
Legal moves and game flow
Mark an editable cell as track or empty, or clear it. In the completion, track cells connect only orthogonally, internal cells have degree two, and endpoints degree one.
Winning and terminal positions
Create one connected path between the two marked endpoints with no branches or separate loops while satisfying all row and column track totals. Before joining the last segments, verify that the connection produces one endpoint-to-endpoint path rather than closing a loop that strands another required track cell.
Practical strategy
Fill any row or column whose remaining quota equals its undecided cells, mark excess cells empty when a quota is met, and protect degree-two path continuity. Matching every side total can still leave a detached loop or a branch; totals, connectivity, and the degree of every track cell are independent requirements.
Questions players ask
What is the objective in Tracks Puzzle?
Create one connected path between the two marked endpoints with no branches or separate loops while satisfying all row and column track totals.
Which moves are legal in Tracks Puzzle?
Mark an editable cell as track or empty, or clear it. In the completion, track cells connect only orthogonally, internal cells have degree two, and endpoints degree one.
What should I plan first in Tracks Puzzle?
Fill any row or column whose remaining quota equals its undecided cells, mark excess cells empty when a quota is met, and protect degree-two path continuity.