Battleships by Thomas Snyder

Battleships by Thomas Snyder

PDF

or solve online (using our beta test of Penpa-Edit tools; use tab to alternate between ship placement and shading modes. In ship placement mode, right click gives sea, left click gives circle/square, left click and drag for rounded ships.)

Theme: Symmetry and Even Clues

Author/Opus: This is the 189th puzzle from Thomas Snyder, aka Dr. Sudoku.

Rules: Standard Battleships rules. Use the indicated fleet.

Answer String: For each row from top to bottom, enter the number of the first column from the left where a ship segment appears (enter both digits if a two-digit number). If the row is empty, enter 0. Enter these numbers as a single string with no separators.

Time Standards (highlight to view): Grandmaster = 1:30, Master = 3:00, Expert = 6:00

Solution: PDF

Note: Follow this link for other classic Battleships. If you are new to this puzzle type, here are our easiest Battleships to get started on.

  • skynet says:

    11:21

  • Moshe Rubin says:

    Believe it or not, one can place the two cruisers (three-segment ships) immediately. From there, the solution follows quickly.

    After filling in the obvious waters we have the following board (‘_’ is water, ‘.’ is empty):


                           1
         1 2 3 4 5 6 7 8 9 0
       +---------------------
    A  | . . . _ . . _ . . .   2
    B  | . . . _ . . _ _ . .   4
    C  | . _ . _ . _ _ . . .   2
    D  | . . _ _ . . _ . . .   2
    E  | _ _ _ _ _ _ _ _ _ _   0
    F  | . . . _ . . _ . . .   2
    G  | . . . _ . . _ _ . .   4
    H  | . . . _ _ . _ . _ .   2
    I  | . . _ _ . . _ . . .   2
    J  | _ _ _ _ _ _ _ _ _ _   0

         2 4 2 0 2 2 0 2 4 2

    The trick is to attempt to place the three (3) virtual cruisers> (i.e., the battleship and the two cruisers).

    There are 2 ways to place 3 virtual cruisers on the board at the same time:

    1> (A9-C9), (B1-B3), (G1-G3)
    2> (B1-B3), (B9-D9), (G1-G3)

    A virtual cruiser at:
       B1-B3
       G1-G3
    is common to all placements.

    The rest is relatively simple.

  • chaotic_iak says:

    02:05.

    Nice opening trick with the three large ships, with a nice finishing with many submarines already known.

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