They'll then use their judgement to predict the outcome or have their powers of observation tested. Either way, the contestants must strike their buzzer and pick either red or black. The first game takes place in the "Red or Black?" arena and subsequent games are held in the studio. After the first three rounds, the four players with the highest scores will move on to Part 2. If a tie occurs, the two or more players will play a tiebreaker round, "Power Bar", to decide who will move onto the second show. The four remaining contestants participate in the next round, which involves celebrities (often singers). Then, the final two players will move on to the "Duel", played as it was during the first series, with the exception that the randomisation of each segment's colours is now shown briefly before being covered; and the game board now consists of 10 segments instead of 8. The competing pair will have to memorise the position of the jumbled up segments, then take it in turns to find their colour. The first to have all five of their colour revealed is the winner and advances to the new final round, "The Vortex". The Vortex is "a true test of skill, nerve and judgment". It consists of a "mini velodrome" which flashes between red and black at a constant rate. The aim is to watch the sequence and adjust the power of the launcher, which will fire a ball into The Vortex. If the balls lands in the End Zone in the contestant's chosen colour, they win the jackpot (starting at £500,000), or else it will increase by £500,000 for the next show. Notes  The coloured backgrounds denote the result of each of the shows:  * Chris's loss on the Vortex was reversed after a review of a smaller camera underneath the Vortex that showed the ball dropping and landing milliseconds before the change in colour to red, thus the money was awarded to him – also note that the rollover still stood. In the week prior to the launch of "Red or Black?", ITV had slipped behind Channel 5 in the ratings on the Sunday night while BBC One had nearly three times the audience share of the ITV channel. While the lead was not as large on the remainder of the evenings, BBC One still beat ITV every night on the overall primetime audience share, except for Thursday night. "Red or Black?" launched on Saturday 3 September 2011, with 6.41 million viewers, giving the show a 29.8% share of the market between 7 pm and 8:15 pm, beating the "Doctor Who" episode "Night Terrors" into second place with 5.54m.