have blinders on
To be oblivious to something that exists or is happening right around one. ("Blinders" are pieces of leather that are used to limit a horse's peripheral vision.) I must have blinders on when I walk around town because I didn't notice any of those new businesses that are opening.
play a blinder
To do something exceptionally well and with a great amount of skill. Primarily heard in UK. The whole team played well, but that new scrum-half really played a blinder out on the pitch! I have to say, for a newcomer in the political arena, the newly elected MP for Middlesborough played an absolute blinder this election.
play a blinder
perform very well. informal Dating from the 1950s, blinder is a colloquial term for ‘a dazzlingly good piece of play’ in sport, especially in rugby or cricket.
2001 Sun Gilles will start and I would just love him to play a blinder and score a couple of goals to knock Southampton out of the cup.