In which Khiem learns to write

I went to Sheer Hell the other day. But it's not what you might expect.

On a map from around 1850, to the southwest of the then village of Tempelhof (now deeply embedded in Berlin), one sees a pond labelled „die blanke Hölle“, or sheer Hell.

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Wondering what could lie behind that name, I asked ChatGPT (though as it turned out, I could have just gone to Wikipedia).

Turns out the pond was originally called Hel-Pfuhl or Hels-Pfuhl, referring to the Germanic goddess of the underworld.

According to legend, the pond formed an entrance to the underworld, the realm of the dead. On its wooded shores stood an altar of Hel, which a priest tended to. Twice a year Hel sent a black bull to the priest to plough the fields. The priest's successor, though, a Christian monk, ceased the offerings to Hel. The following spring, when the bull appeared, it did not plough the fields but devoured the monk.

Until the twentieth century the rumour remained in the unsettled and rugged area that the lake would claim victims every year. These rumours had a grain of truth to them, as several people did indeed drown in the apparently harmless waters.

To my surprise, given that the majority of fishponds on the map (frequently labelled Karpfen Pf[uhl] as you can see here) no longer exist, it turns out that „die blanke Hölle“ not only does still exist, but I've even been there! It's now called „Blanke Helle“ on Google Maps, reverting to the older vowel in the name, and is in the middle of Alboinplatz.^* (There's no reference to its name at the actual site, though.)

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The reason it still exists is probably due to its geology. It is, I learned, a kettle hole (Toteisloch). Apparently, when bits of glacier break off, they are called dead ice. As the glacier flows past, dead ice can get surrounded with and eventually covered in sediment. This happened here during the Ice Ages, but when the ice subsequently melted, the ground over it subsided, leaving a pit which got filled with rainwater to form the pond.

Commemorating the legend concerning the site, sculptor Paul Mersmann the Elder was commissioned in 1931 to create a monument depicting the bull. By the time it was finished in 1934, the Nazis were in power; they didn't like it and threatened to tear it down. The dislike, however, was mutual: according to the sculptor's son there is, inside the bull, a capsule denouncing Hitler signed by various artists and sculptors.

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* Hardcore Tolkien fans may recognise the name of the king of the Lombards who brought them to (i.e. conquered) Lombardy, and a cognate of Old English Ælfwine (the English sailor who learned the stories that later became The Silmarillion on sailing to Tol Eressëa in The Book of Lost Tales), or in modern English, Alvin,^† meaning "elf-friend", and therefore a reincarnation (?) of Elendil in the sadly abortive work The Lost Road.

† Has anyone reading this ever come across that name other than in the name of Alvin Stardust?

When I was an undergraduate someone introduced me to the game of four-dimensional noughts and crosses. Of course, it's impossible to construct a four-dimensional board, but in the same way that you could represent the layout of a Rubik's cube on paper as three 3×3 grids stacked on top of each other, you could represent a 4×4×4×4 tesseract as four cubes stacked onto each other in the fourth dimension, each of which can then be taken apart in the same way, such that you end up with a 4×4 grid of 4×4 grids.

This turns out to be, unsurprisingly, several steps up in complexity from the conventional game, and lots of fun. It was a pain to have to draw the board each time, but eventually I printed it out, and used washers with Tipp-Ex on one side as the game pieces, a solution which lasted until my bag ripped open in the hold of a flight, and the games set my washers and board were in was lost.

For years I've been vaguely considering writing a computerised version, but was put off by how much of my limited free time it would take. (That's limited, as in parent-of-a-small-child.) Recently, though, it occurred to me I could delegate the donkey work to an LLM, and here's the result.

There's two player and single player versions. The two-player version is for two players at a single computer, tablet, etc; it's not enabled for communication via the Internet.

Since it can not always be obvious when a winning line is formed across multiple dimensions that it is actually a straight line, the game will rearrange the projection when the winning line is not within a single grid to show it within such a grid. You can always switch back to the original view with a "Toggle presentation" button.

Have fun playing!