Estimated ELO ranking of Alphago (as of writing of the paper, jan 2016) : 3140. The ELO was based on a tournament between different Go programs. (See Extended Data Table 6 in the paper)

Significant matches:

Date Player Elo rating Dan rating Outcome
October 9, 2015 Fan Hui 2920 2 dan Alphago wins 5-0
March 9th-15th 2016 Lee Sedol 3521 9 dan TBD