Sum Links
All gamesTotal 0 / 18Cells 0 / 4Tries 0 / 3Routes 7 · open
Link 4 cells totalling 18. 0 chosen, totalling 0, 18 to find in 4 cells. 3 tries left. Cursor at column 2, row 2, value 3, free.
Trace 4 touching cells that total 18. Each one must share an edge with the one before it.
← → ↑ ↓ move · Enter take the cell, or press it again on the last cell to take it back · F check the line · Esc clear it. The small → number is what you would still need. Click the board first, or press Tab to focus it.