Magnets

from Simon Tatham's Portable Puzzle Collection


If you've been reading this message for more than a second or two, then this WebAssembly puzzle doesn't seem to be working in your web browser. Sorry!

More information

Most modern browsers should support WASM. I've had reports of success from:

If this puzzle isn't working in one of those browsers (or a later version), check to see whether you have any local configuration that might have turned off WebAssembly completely, or some kind of blocking software that might have prevented the WASM code from being downloaded in the first place.

(For example, in Firefox, it's possible to turn off WASM completely by setting javascript.options.wasm to false in the about:config interface. If you've done that, or something analogous in another browser, this puzzle won't run.)

In other browsers, the problem might be that WebAssembly isn't supported at all (for example, Internet Explorer 11), or that a browser update is needed.

If you think that your browser should support WebAssembly, but this puzzle still isn't running, then please report the problem, including as much diagnostic information as you can find.

In particular, try opening your browser's Javascript error console and then reloading this page, and tell me if it reports any error messages.

Also, if your browser has a network diagnostic tab, try the same experiment, to make sure it is successfully loading both of the auxiliary files magnets.js and magnets.wasm.


Fill each domino shape with either a magnet (consisting of a + and − pole) or a neutral domino (green).

The number of + poles that in each row and column must match the numbers along the top and left; the number of − poles must match the numbers along the bottom and right. Two + poles may not be orthogonally adjacent to each other, and similarly two − poles.

Left-click a domino to toggle it between being empty and being a magnet (the + is placed in the end you click). Right-click to toggle between empty, neutral, and a ?? mark indicating that you're sure it's a magnet but don't yet know which way round it goes.

Left-click a clue to mark it as done (grey it out). To unmark a clue as done, left-click it again.

Full instructions | Back to main puzzles page


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(thanks to chiark for hosting this page)
(last modified on Wed Apr 28 01:47:05 2021)