Toi Gye
Toi Gye returns to the Pinan/Heian series, using sequences from 3, 4, and 5, as well parts from Passai/Bassai-Dai and Jitte, both listed in Choi's 1965 book.
The following videos were used as reference:
ITF Legacy performance of Toi Gye.
Hirokazu Kanazawa performing Heian Sandan, Heian Yondan, Heian Godan, Bassai-Dai, Jitte (Shotokan).
The opening movement of Toi Gye is the same as the opening movement of both Heian Sandan and Godan. It is a single movement, which wouldn't normally be noteworthy, but Toi Gye contains partial sequences from both of these patterns, so I find it relevant. The rhythm of Toi Gye's opening 3 movements also matches the rhythm of Godan's opening 3.
Movements 2 and 3 of Toi Gye resemble many sequences from older kata: a low spear hand with the other hand by the shoulder, then pulling the low hand up and the high hand down. Some bring the spear hand to the waist, some above the head, with all variety of stances. This is commonly done pulling the hand to the waist, but Bassai-Dai contains a sequence that matches the specifics of Toi Gye's opening.
After repeating this on both sides, Toi Gye turns North into a front stance, executing a low X block then a twin high punch. This resembles a section that appears in the same spot in Heian Godan, done with a high X block.
Toi Gye follows with a front kick and two punches. Godan follows with a sequence much closer to Yoo Sin, though Toi Gye will later use an unmistakable sequence from Godan. It's possible that Toi Gye was created after Yoo Sin and Ul Ji, both of which use this piece of Godan, and it was altered to a twin punch here in order to differentiate it.
Toi Gye's next sequence is interesting in that it combines two sections from two completely different patterns:
Heian Sandan and Jitte. Toi Gye delivers two punches, turning while bringing the hands on the hips, elbows out, then proceeds into a series of stomping sitting stances paired with W shape blocks.
The elbows-out-hands-on-hip position comes from Heian Sandan: a punch, followed by a turn bringing the feet together and hands on the hips, and a series of stomping sitting stances, but with the arms remaining on the hips.
I originally believed that Toi Gye simply moved the arm position, until seeing a video of Jitte that contained an identical series of stomping sitting stances with W shape blocks, though not preceded by hands on the hips.
Toi Gye (shown here from the rear) continues with a low double forearm block, then the grab, knee, turn, knife hand sequence from Heian Yondan. Yondan does two consecutive knife hand blocks, while Toi Gye inserts a front kick and spear hand after each (not pictured).
Toi Gye then performs, nearly identically, another piece of Heian Godan: the high backfist, jump into X stance low X block, step forward into a double forearm block.
Toi Gye's final sequence resembles a small piece of Bassai-Dai: two circular blocks executed while shifting the angle of the stance. Kanazawa has a much larger wind-up than the ITF performer, but both blocks come across low, then back. This is also used in Ul Ji, where it follows the original more closely.