"We have many riches in this area," said defense coach Shaun Edwards on Tuesday at a press conference. "We have to make an important decision."
This will be the choice of coach Warren Gatland from Anscombe or Biggar, because Patchell will not be considered during this weekend test.
Patchell has not played since the shock of the brain at the beginning of last month, playing Scarlet against Osprey, but despite the fact that he has passed successfully, the match is considered incomplete.
However, biggar from England joined the team on Monday after he was unable to play on Saturday's 21-10 win over Scotland because the test went out of the international window and would try to resume his role as the first choice.
But Anscombe born in New Zealand had a good game and would hope to nod again with Gatland when the team was named on Thursday.
"It's great to have competition, I know it's a glamor item, as the axis you control in the game. We'll be considering it for the next few days," Edwards said.
Wales also confirmed that the prostitute Ken Owens and flanker Ellis Jenkins are fit, but the heavily backed Samson Lee T-shirt, which is struggling with the hamstring problem, is on a Saturday test at the Principality Stadium.
"Samson is a very strong scrummager, but we have Tomasz Franciszek and we are strong in this position with a narrow head," said Edwards.
Owens suffered a broken nose during a victory over Scotland, and Jenkins, who was not involved, recovered from a shoulder injury. (Reporting: Mark Gleeson, Edition: Hugh Lawson)