Kuzure-kesa-gatame (崩袈裟固), the modified scarf hold.

Osaekomi-waza (hold-downs).
Required for: 4th Kai (white belt with a green stripe, JudoScotland); 5th Kai (white belt with a blue stripe, JudoScotland); 6th Kai (white belt with a purple stripe, JudoScotland); 3rd Mon (red belt, British Judo Association); 13th Mon (blue belt, British Judo Association); 6th Kyu (red belt, JudoScotland); 2nd Kyu (blue belt, JudoScotland); 2nd Dan (black belt, British Judo Association); 3rd Dan (black belt, British Judo Association); 4th Dan (black belt, British Judo Association); 5th Dan (black belt, British Judo Association).

About
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Kesa-gatame with the arm under uke's shoulder instead of around the neck: harder to escape from and the version most used in contest.

Step by step (standard right-handed form)
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1. Your partner lies on their back; take the scarf-hold position at their right side, hip to their ribs, facing their head.
2. Instead of wrapping their neck, drive your right arm underneath their left armpit and grip cloth at the shoulder, or reach the mat beyond, so your arm threads under their far shoulder.
3. With your left hand, trap their right arm under your left armpit and pin it to your side.
4. Spread your legs wide, one forward and one back, and keep your chest heavy on theirs.
5. This version frees their head but controls the shoulder line; as they turn towards you or away, shift your hips around the compass while the chest pressure never lifts.

Key points
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1. Drive your arm under uke's far shoulder, not around the neck
2. Stay chest-to-chest with your weight through uke
3. Adjust your base constantly as uke bridges and turns

Receiving it
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The weight is the same as the scarf hold but your head is free and their arm is threaded under your far shoulder, which makes the shoulder line feel nailed down. Escapes go through your hips: bridge, turn towards them, work an elbow inside. Keep breathing low and steady; the hold defeats panic before it defeats strength. Tap clearly if you are stuck and need to stop.

VI judo notes
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Threading your arm under the far shoulder gives you a contact that reports which way they are turning, which is why this version holds better than the neck wrap. Their arm pinned at your side is the second reading: when it starts to slide, the bridge is coming. Travel your hips around the compass to meet it and never let the chest lift.

Reference pages elsewhere
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Kuzure-kesa-gatame on the IJF technique reference (International Judo Federation): https://judo.ijf.org/techniques/Kuzure-kesa-gatame

From Waza Book: https://wazabook.com/techniques/kuzure-kesa-gatame/