Question: What is similar of Shatranj and 18XX? 
Sentence (from "Shatranj"): Shatranj (Hindi शतरंज , Urdu شطرنج , from Middle Persian "chatrang چترنگ"), is an old form of chess, which came to the Western world by the Persians and later Greeks, and ultimately from India ("chaturaṅga)" via the Persian Empire.
Relevant evidence: Yes