Кызылырмак
Scholars are divided on the location of Samuha. Some maintain it was on the banks of the Euphrates river. Others believe it was located on the Halys river, presently called the Kızılırmak River. The Kızılırmak River is closer to Hattusa. Its headwaters are near the city of Sivas, 130 miles (209 km) away. The river flows to the east, south of Hattusa, then heads northward on the east of Hattusa, discharging into the Black Sea. The Euphrates location is reflected in the GPS coordinates above. Hittite records indicate that Samuha was located on a navigable river, which tends to support the Euphrates location. Oliver Gurney notes in the above-cited work that the Halys river is also navigable in sections. He favors the Euphrates location, noting that the Murad Su, the present day Murat River had river traffic in 1866. The Murat river is a tributary of the Euphrates river. Both proposed locations are south of the Kaskian incursion that overtook Hattusa and required the Hittite leadership to move to Samuha.