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Fingertips: Something Grabbed Ahold of My Handby Melvin RangasamyEpisode 30 of Apollo 18 Tribute Album 2012 Prison Drama Inform 7

(based on 5 ratings)
2 reviews — 8 members have played this game. It's on 1 wishlist.
You have been imprisoned but your crime can't have been that bad, as they're giving you a chance to escape if you're smart enough!
A one move parole board for Apollo 18+20: The IF Tribute Album.
 Average Rating: based on 5 ratings Number of Reviews Written by IFDB Members: 2 Write a review 
As a mathematician, I was excited by a one move game set in jail (a frequent location for logic puzzles) with a strong number theory puzzle.
I immediately pulled out my number theory techniques, trying to remember the difference in the tau function between powers of primes and other numbers.
Then I found the solution, and I was embarassed.
It was a fun ten minutes.
Although Fingertips: Something Grabbed Ahold of My Hand takes its title and a minor detail of its plot from a song by They Might Be Giants, it's really an adaptation of a problem in recreational mathematics. (I hadn't seen the problem before, but a Web search implies it may be quite well known.)
As the game opens, the protagonist is confined "in a prison that has 32767 cells" and told that some prisoners will be selected for release by a procedure that depends on the cells' numbering. (Reducing this procedure to a mathematical criterion is half the puzzle, so I won't summarise further.) The character is lucky enough to have a free choice of cells, and the player's single move is to select one.
Given that this plot is transparently a pretext for the puzzle, it would be unreasonable to expect much characterisation. It's therefore to this game's credit that it incorporates the comic figure of "The 'Guv" where the puzzle requires only a faceless guard or official. The writing is amusing and entertaingly selfaware about the absurdity of the situation it describes.
I found the puzzle interesting, but unfortunately I don't think it's wellserved by the onemove format that was required for Fingertips games in the Apollo 18 series. Once the player understands the question, finding one cell that will result in the protagonist's release is little challenge. Successful endings differ only in a small randomised detail, so there's little ingame incentive for the player to seek out multiple solutions, still less to find or justify a general rule for which cells are safe.
The game also isn't helped by some technical issues that may have been beyond the author's control. Claiming the nonexistent cell zero receives an appropriate response, but other outofrange answers aren't understood correctly, presumably due to limits on ZMachine variables. The parser rarely understands numbers entered as words, and although numerals are always understood they lead to an odd reference to "picking a number at random".
Despite being unambitious and a little buggy, Something Grabbed Ahold of My Hand is suited to the Fingertips role of providing a brief diversion between longer games, and it's worth playing in its own right if you're interested in mathematical puzzles.
Apollo 18+20 by Teaspoon
Interactive fiction games, with one game per track on the album Apollo 18 by They Might Be Giants. The regular tracks are generally short games. The Fingertips tracks are onemove games (however the authors interpreted that). The games...