The Aiq Beker, also known as the Kabbalah of Nine Chambers is a tic-tac-toe grid into which the twenty-two Hebrew letters, along with the five final forms of some of the letters, are inscribed. The letters are entered in sequence from right to left, after the manner of writing Hebrew, until the nine cells of the grid are filled. Then the next nine letters are entered, and finally the remaining four letters and the five final forms. This results in each cell of the grid containing three Hebrew letters.

Aiq Beker was used for a number of purposes by Kabbalists and Western Hermetic magicians. Foremostly, it is a way to occultly link sets of Hebrew letters. The letters in each cell are assumed to be connected on some esoteric level, and therefore in a measure equivalent to each other. During Kabbalistic manipulations of names and words of power, one letter in a cell can be substituted for another, allowing different interpretations and practical uses for the words involved.

The grid also functioned as a sort of cypher machine. Magicians represented the letters in the cells by means of the borders of the cells. For example, a letter in the central cell would be substituted for by a closed box; a letter in the upper-left cell would be substituted for with an angle that opened to the left; and so on. Which of the three letters in a cell was intended by these graphic symbols was indicated by means of dots place at the tops of the angles. One dot meant the letter on the right, two dots the letter in the middle, and three dots the letter on the left side of the cell in question.

When these angles of the grid were combined, it was possible to produce elegant sigils representing the names of gods, angels, spirits or demons. In the example provided in the illustration at the top of this page, which was given by Cornelius Agrippa in Book III, Chapter XXX of his Three Books of Occult Philosophy, the name of the archangel Michael has been converted into angles on the Aiq Beker grid, and these angles have been combined to yield the attractive sigil inside the circle.

In modern times, the Aiq Beker became a form of secret writing used by Freemasons and other esoteric societies. Through overuse, the method became so well known that it has now degenerated into a plaything for children, who insert the letters of English into the grid to make a form of secret writing. However, the method has immense power, and is still in serious use among Kabbalists and magicians.