The Straits Times, 6 November 1933, Page 13
Batak Chess Players
Article also available on microfilm reel NL1481 [Lee Kong Chian Reference Library - On shelf]
Batak Chess Players (From Our Own Correspondent). Medan, Nov. 1. The Deli Courant states that the Batak chess players, SI Toemboek, Si Ngoekoem and Si Narsar, intend to make a trip to Singapore and Java. Natives in the Batak territories (the districts near Brastagi and Prapat) are strong chess players, the custom being for the men to Play chess, while the women d j the hard work. On a former occasion, Si Toembroek and Si Ngoekoem met the famous Dr. Enwe and proved their skill.
source : National Library Singapore