Lurgan's Annabel Wilson and Lisburn's Paula Grant are in contention heading into Friday's final 36 holes of the Ladies' British Open Amateur Strokeplay at North Berwick.
England's Gemma Clews added a four-under 69 to her opening 73 to lead by a stroke on four-under par from compatriot Hannah Screen.
But Wilson is just three strokes behind on one-under after rounds of 75 and 70, tied for third with Sweden's Lin Grant while Irish Close champion Grant is just a shot further back after a brace of 73s.
Seven of the 10-strong Irish contingent made the 10-over par cut with Douglas' Sara Byrne the next best of the Irish on six-over 152.
Jessica Ross, Julie McCarthy and Valerie Clancy are tied 28th on nine over while Maynooth's Ciara Casey made it on the mark thanks to a birdie at the 18th.
Ladies' British Open Amateur Strokeplay, North Berwick (Par 73)
T3 WILSON, Annabel Lurgan 75 70 145
5 GRANT, Paula Lisburn 73 73 146
T16 BYRNE, Sara Douglas 77 75 152
T28 ROSS, Jessica Clandeboye 79 76 155
T28 MCCARTHY, Julie Forrest Little 78 77 155
T28 CLANCY, Valerie Killarney 77 78 155
T36 CASEY, Ciara Hermitage 80 76 156
MC THOMPSON, Rachel Cork 86 73 159
MC SEXTON, Sinead Lahinch 80 80 160
MC FORBES, Emma Royal Portrush 86 79 165