First half tries from Martin Moore and Craig Gilroy helped Mike Ruddock’s men to an 18-17 half-time advantage but three second half penalties from home fly-half Matthew Morgan looked to have secured Wales a narrow victory.
But Doyle pounced in the 83rd minute to clinch a share of the spoils. Ireland could have gone a step further and sealed the win but Paddy Jackson struck the left-hand post with the conversion.
Ireland got off to the perfect start with a Jackson penalty but Wales almost instantly struck back with a try against the run of play. Blane McIlroy threw a wayward pass that missed his entire backline. The surging defence hacked through and Adam Warren snatched the ball to score after Michael Sherlock coughed up possession on his own try-line. Morgan added the extras to put the hosts into a 7-3 lead.
Ireland soon responded thanks to Jackson’s second penalty on nine minutes, just moments after he failed with a long-range attempt. Ireland grabbed a strangle-hold on the game when Moore drove over from close range after 15 minutes.
Jackson sliced the ensuing conversion but it did not take Ireland long to get back on the scoreboard. Craig Gilroy has received plenty of plaudits for his impressive displays on the wing for Ulster, with five tries in seven league matches, and he demonstrated his attacking capability with a fine try.
Gilroy sliced through the Welsh defence and stepped passed Steve Shingler before crashing through three defenders to score. Jackson dissected the posts to stretch Ireland’s lead to 18-7.
But Wales re-grouped and capitalised on another Ireland mistake with their second try. Williams put in a thundering hit on McIlroy who spilt the ball. Welsh wing Harry Robinson pounced on the ball and broke free before throwing a superb pass to Williams raced clear to score.
Morgan was again on target with the boot and cut the deficit to four boots and he added a penalty on 39 minutes to bring the scores to 18-17 at the interval.
Ireland hit the ground running in the second half and Jackson added a third penalty on 43 minutes.
Wales got back on the scoreboard thanks to the boot of Morgan on 72 minutes to set up a tense finale with the scores at 21-20. And the home fly-half edged Wales into a 26-21 lead with two more penalties.
The game looked dead and buried for Ruddock’s men but after a succession of penalties Doyle crashed over to level the score. That put the limelight on the impressive Jackson but he failed with the conversion as Irish elation turned to devastation.