Advancements in Mathmatics: 150 CE – 1000CE

190 CE

The first mention of the suanpan in print, (Chinese abacus) which was widely used until the invention of the modern calculator. 1

639 CE

Indian mathematician Brahmagupta was the first to describe the modern place-value numeral system.

820 CE

Persian mathematician, Muḥammad ibn Mūsā al-Khwārizmī, described the rudiments of modern algebra.

850 CE

Arab mathematician Al-Kindi (Alkindus), was a pioneer of cryptography. He gave the first known recorded explanation of cryptanalysis in A Manuscript on Deciphering Cryptographic Messages. 2

1000 CE

Abū Rayhān al-Bīrūnī invented the Planisphere a early analog computer.

In 2002, a Gate of Battlecrypt appeared in the Kingdom of Ehb. Can you name the Game?


  1. Math will be featured in this blog
  2. Cryptography and or puzzels will be featured in this blog.