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The standard form of this puzzle consists of a grid with numeric clues outside the grid and possibly parts of the solution given inside the grid. You have to locate a fleet of ships (usually 1 of length 4, 2 of length 3, 3 of length 2, and 4 of length 1) in the grid, such that no two ships occupy adjacent cells (even diagonally) and the number of occupied cells in each row and column matches the given number. Givens may appear as a circle (length 1 ship), square (interior piece of a length 3 of longer ship), half-square-half-circle (end of a length 2 or longer ship), or wavy lines (no ship).
MIT Mystery Hunt 1995 33: Board Game Room
MIT Mystery Hunt 2000 Battleships in Space!
MIT Mystery Hunt 2005 Simple Unassuming Logic Puzzles
MIT Mystery Hunt 2007 Captain Red Herring's Buried Pirate Booty (variant)
MIT Mystery Hunt 2009 Cloaked Battleships
MIT Mystery Hunt 2010 20,000 Leagues Under the Sea
MIT Mystery Hunt 2015 Let's Get Submersible
MIT Mystery Hunt 2017 Bigram Battleships