Ronnie O'Sullivan hit a maximum break as he beat Joe Swail 5-4 to reach the Kilkenny Irish Masters semi-finals.
Ronnie O'Sullivan plays John Higgins in the semi-finals
'The Rocket' believed the feat had won him a car, but he subsequently learned that this was not the case.
But he made up for his disappointment later on by beating John Higgins 6-5 in a close-fought semi-final encounter.
He now faces fellow Englishman Barry Hawkins, who ended Irish hopes by beating Fergal O'Brien 6-5 in another close match in the second semi-final.
Hawkins had upset Stephen Hendry 5-2 to set up his meeting with O'Brien, who shocked compatriot Ken Doherty 5-0. Higgins beat Graeme Dott 5-4.
O'Sullivan's memorable feat was only the second 147 break in a professional tournament in Ireland.
Tournament organisers had initially promised a car to any player who pocketed a 147 break but later withdrew their offer claiming they had not been able to gain adequate insurance for the new vehicle.
"I only went for the maximum because I thought I was going to win a car, but now I've found out I'm not going to win one, I'm gutted!" said this year's SAGA Insurance Masters champion.
"It was a good atmosphere out there. The crowd went mad for the 147 - and it's nice to make a boost to the new tournament."
Following his victory over Higgins, O'Sullivan added: "To be honest, John played better than me, he deserved to win.
"I played well, but the table helped me. It was a great atmosphere in the
arena. The Irish love their snooker, so it was good fun."
Higgins said: "It's hard to gauge how well I'm playing, but I've had a couple of good wins this week, which has been good for my confidence.
"I want to start playing better and find a bit of form because the World Championship is not far away."