Re: Minesweeper solver
Article: 7913 of alt.hackers From: email@example.com (Eric Postpischil) Newsgroups: alt.hackers Subject: Re: Minesweeper solver Date: 30 May 1995 15:26:13 GMT Organization: Digital Equipment Corporation Lines: 36 Approved: edp Distribution: world Message-ID: firstname.lastname@example.org Reply-To: email@example.com NNTP-Posting-Host: math.zk3.dec.com Status: RO
Sam Wood (firstname.lastname@example.org) wrote, in some article that expired: [Assertion that Minesweeper guarantees the first chosen square is safe.] >not true. It's tru that it would be simple to implement, but it just >isn't the case. I have on many occasions hit a mine on the first square. >try the corners. i have never seen a case where no corner had a mine. I tried the corners. Did you? I set Minesweeper (from Windows 3.1) to 24x30, with 667 mines (the maximum it will accept). In 20 successive games, I tried each of the corners five times as the first square. No bomb ever appeared in the first chosen square. If the bombs are placed by random choice from a uniform distribution, the chance of 20 squares independently not having bombs in them is ((24*30-667)/(24*30))^20, or about one in 46 sextillion. ObHack: Need to use Recorder to run two macros at different times in the same session without user intervention (both to work around bugs in other products). But Recorder won't activate a second instance (running it a second time just activates the first window), and Recorder doesn't provide any way to terminate itself -- It just hangs around after executing a macro. Solution: Copy Recorder to a different file name. The newly named file would run even with the original Recorder still active, although not vice-versa. (More of a kludge than a hack, but oh well.) -- edp (Eric Postpischil) "Always mount a scratch monkey." email@example.com Disclaimer: The opinions of Digital Equipment Corporation do not reflect mine. Public key fingerprint: 8e ad 63 61 ba 0c 26 86 32 0a 7d 28 db e7 6f 75. To get PGP, FTP /pub/pgp/pgp26uis.zip or pgp26uix.zip from ftp.demon.co.uk.