Beginner's Guide
Galactic Cruisers is a pure logic puzzle — no guessing, no randomness. Once you understand the five core rules, every puzzle becomes a satisfying chain of deductions from start to finish.
The Rules
Row and column clues
A number beside each row and above each column tells you exactly how many ship cells appear in that line. A row clue of 3 means exactly 3 of its cells contain part of a ship — and the rest must be scanned sector.
Place the entire fleet
The fleet panel shows every ship you must place: for example, one 4-cell Command, two 3-cell Destroyers, three 2-cell Phalanxes, and four 1-cell Fighters. Every ship in the list must appear on the grid exactly once.
Ships are straight
Every ship occupies a straight, unbroken run of cells — either horizontal or vertical. There are no L-shaped, diagonal, or bent ships.
No ships may touch
Ships cannot be adjacent to each other orthogonally or diagonally. A full border of empty scanned sector must surround every ship on all sides, including the corners.
Use the clue cells
Some cells arrive pre-revealed as ship or scanned sector. These locked cells cannot be changed and serve as your first anchors. All deductions build from them.
Tips for Your First Puzzle
Start with confirmed clue cells
Pre-revealed ship cells immediately force neighboring diagonal cells to scanned sector (the no-touch rule). Pre-revealed scanned sector cells shrink the space available in their row and column. Work outward from every clue cell before placing anything else.
Apply count-forcing early
If a row clue equals the number of unknowns still in that row, every unknown must be a ship. If a row already contains the clue count of ships, every remaining unknown must be scanned sector. Scan all rows and columns for these forced cases first.
Track the fleet manifest
As you place ships, cross them off the manifest. The remaining ships constrain where further placements are possible — if only a 2-cell Phalanx is left, any unknown run shorter than 2 or longer than 2 cannot be that ship. Use what's left to eliminate impossible positions.
Mark scanned sectors confidently
Marking scanned sectors is as important as marking ships. Every scanned sector cell you confirm reduces unknowns and tightens the remaining constraints. Do not leave cells unresolved — use scanned sector marks aggressively when a cell is clearly forced.
Common Mistakes
Forgetting the diagonal no-touch rule
Most beginners remember that ships cannot be side-by-side, but forget the diagonal restriction. Two ships placed diagonally adjacent violate the rules just as much as two ships sharing a side. Check all eight neighbors of every ship cell.
Placing ships without checking both constraints
Before placing a ship segment, verify that both its row and column still have budget for it. A cell that satisfies the row count might already be maxed out by column constraints — and vice versa.
Ignoring near-complete rows
A row with only one unknown cell is almost always resolved immediately from the count constraint. Scan for these after every placement — they are often the quickest source of free deductions.
If You Enjoy Similar Games
If you have played Bimaru or Battleship Solitaire, the row-and-column counting logic in Galactic Cruisers will feel natural straight away. The fleet placement and no-touch rules follow the same grid-deduction structure those games use. Galactic Cruisers wraps the classic puzzle format in a deep-space setting, with a fleet of cruisers and fighters replacing the traditional naval ships.