The invading Ayutthayan forces supporting Prince Yi Kumkam’s bid for the throne of Chiang Mai, defeated at Phayao, besiege the capital city of Chiang Mai, whose defenders fiercely resist all efforts at conquest.

The other contender, Prince Sam Feng Ken, finally suggests that the succession dispute be resolved by a single contest between two champion warriors: one from Chiang Mai, the other Ayutthayan.

His brother agrees to renounce his claim to their late father’s throne if his Ayutthayan champion loses.

After several hours of combat, the Ayutthayan combatant is wounded in the big toe and thus declared the loser.

The Ayutthayans consequently withdraw from Chiang Mai, then march north to the town of Chiang Rai, where, as indemnifcation for the cost of the war, they carry off many captives to slavery in Ayutthaya.