SPOILER ALERT
I have discovered a very major flaw in the number of deaths. I did not find any one or article describing this flaw but please correct me if I am wrong.
There were 80 people before tug of war and after tug of war game 40 players are left.
And the doctor is killed so that leaves to 39 players. For the marble game, the lady is left out because of odd number, hence 38 players are played as a team out of which each player in a team is killed. So that leaves to 19 players. They even show 19 guards in the beginning of the game, where each guard is alloted to one team.
So if we add 19 and 1(the lady who was left out), after the Marble game, the total number of players must be 20.
But in the series, they showed 17 as winners after the marble game. And one hangs himself and the number of players in the bridge game is showed to be 16. This is a very big mistake.