Is Landmarks free to play?

Yes, Landmarks is completely free to play in your browser on lern-digital.de – no sign-up, no install, no tracking.

Can I play Landmarks on mobile?

Yes. Landmarks is optimised for phone, tablet and desktop and runs directly in the browser.

Is Landmarks also available as a book?

Yes, there is a matching large-print paperback on Amazon – great for travel and as a gift.

Landmarks

A brand-new position-sum logic puzzle — free online or as a large-print book

Place 1..N once per row and column. An edge number is the SUM OF THE POSITIONS of the visible towers (position 1 = closest to the edge). Tap a cell, then tap a number.

Prefer paper?

Landmarks — 110 puzzles (Easy, Medium, Hard) as a large-print paperback.

How Landmarks works

Each row and each column must contain every tower height from 1 to N exactly once (a Latin square). Looking in from an edge, a tower is visible if it is taller than all towers before it. The edge number is the SUM OF THE POSITIONS of the visible towers, counting 1, 2, 3 ... inward from that edge. Example row [2,1,4,3] from the left: position 1 (height 2) is visible; position 2 (height 1) is hidden; position 3 (height 4) is visible; position 4 (height 3) is hidden. Left clue = 1 + 3 = 4. Note: adding the heights would give 2+4=6 — that is the Sumtowers puzzle. Landmarks adds the POSITIONS. Every puzzle has exactly one solution.