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Board Solutions and Analyses |
Here you'll find annotated solutions and analyses of Fathom It! boards found in both the evaluation and registered version. Reading through a solution can give you insight into solving Fathom It! boards or pitting your solution against the ones recorded here.
If you have a solution for a board not found here, please send it to us for inclusion on this page! Check out example of submitting a solution by e-mail.
Index
of Fathom It! Board Analyses
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7x7 Intermediate Board Analyses
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| Shmuel demonstrates a powerful technique of cross-checking row and column tallies within a sub-portion of the board. |
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| Solves the board "four under par" (i.e., betters the automatic solver by four moves). A neat observation leads to the solution -- a triumph of mind over solver! |
7x7 Hard Board Analyses
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| Elegant use of the "board uniqueness" assumption (over two columns, rather than one) to solve the board. To keep the record straight, here's Wei-Hwa's comment:
Found in both unregistered and registered versions. |
10x10 Intermediate Board Analyses
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| Good step-by-step tutorial. Demonstrates placing the battleship by showing the other possible position leads to a contradiction. Found in both unregistered and registered versions. Here's a Turkish translation of this analysis. |
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| Nice use of the "board uniqueness" technique. Found in both unregistered and registered versions. Here's a German translation of this analysis. |
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| Found in registered version. |
10x10 Hard Board Analyses
Board Number |
Submitted by |
Comments |
| 7 | Shmuel Siegel | Uses an original solving rule ( the "6x2 or 7x2
rectangle" rule) to break down the board.
Found in both unregistered and registered versions. |
Shmuel Siegel | Clever use of logic to place the battleship. Once that's done, you should be able to solve the board relatively easily. Found in both unregistered and registered versions. | |
| 190 | Shmuel Siegel | After proving the battleship must reside in row C,
there's only one valid position to place it at. Everything else
falls together from that point onwards.
Found in registered version of Fathom It!. |
Incomplete Tallies: Board Analyses
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| From GAMES Magazine's "Brain Twisters from the World Puzzle Championships, Vol 2", pg.38. A fascinating insight unlocks this seemingly very difficult board. |
| From GAMES Magazine's "Brain Twisters from the World Puzzle Championships, Vol 2", pg.39. |
| Moshe Rubin | From Thomas Snyder's "The Art of Puzzles" blog, Friday Puzzle #177, "24hour Battleships". A delightful incomplete tally Battleship puzzle, constructed to use the digits 2 and 4 as both row and column tallies. |