What's the rating estimate of these players?
https://www.youtube.com/watch?v=v7_Rbz_EG1U (player A and player B)
https://www.youtube.com/watch?v=ONDrelWPF28 (player A and player C)
https://www.youtube.com/watch?v=t1u2ECUcSHQ (player C and player B)...