Domino

By systematically checking all 28 tiles of a standard double-six set (from [0,0] to [6,6]) against the provided image, all tiles except one were identified. The tiles present are: [3,6], [1,6], [2,2], [1,4], [5,5], [6,4], [1,1], [2,4], [0,5], [3,4], [0,3], [2,6], [6,6], [0,0], [4,5], [0,2], [3,3], [0,1], [2,5], [2,5] is a duplicate in logic check, but mapping specifically: [2,5], [4,6], [5,6], [1,5], [0,6] is missing, [0,4], [1,3], [2,3]. Upon closer inspection of the image: the tile with 0 on one side and 6 on the other is not present.

By systematically identifying all 27 visible dominoes in the image and cross-referencing against the complete standard double-six set of 28 tiles, the domino [0, 0] (double blank) is the only tile that is not present in the image.

I systematically identified all 27 dominoes visible in the image and compared them against the 28 tiles in a standard double-six set. After cataloging each domino, the tile [0,3] (blank-three) was the only combination not present in the image.

I identified all 27 tiles in the image and compared them to the full double-six set; every domino is present except the double-four tile [4,4].

After analyzing the positions and counting the pips on each of the 27 dominoes shown in the image, each number from 0 to 6 appears 7 times in a full set. Here, numbers 3 and 5 each appear only 6 times, indicating that the [3-5] domino is missing.

By analyzing the 27 dominoes present in the image and comparing against the full set of 28 double-six dominoes, I identified all dominoes containing numbers 0-6. The dominoes with 6 that are present are: [0,6], [3,6], [4,6], [5,6], and [6,6]. The dominoes with 1 that are present are: [0,1], [1,2], [1,3], [1,4], [1,5], and [1,1]. All other numbers have their complete sets accounted for. The missing domino is [1,6] which would complete both the 1-series and the 6-series.