If the game was scored on the technical merit of defense, there would be decimal points on the scoreboard and Boonsboro could well be advancing in the tournament.
But points mattered and the Warriors (16-7) didn't get enough of them.
"That has been our problem all year," Shaffer said. "Our offense has struggled."
It showed early and gave Poolesville an early edge it was able to ride most of the game.
The Falcons used their motion offense to get shots in the flow and build an early lead. Katelyn Keese hit a pair of 18-footers to stake Poolesville to a 10-4 advantage and the Falcons were up 15-7 after the first quarter.
On the other side, Poolesville was able to keep the Warriors disjointed, as many a trip downfloor ended in loose balls and changes in directions after one missed shot.
"Our goal was to hold them to eight points a quarter," Shaffer said. "We did that, except for the first quarter."
Boonsboro's defense -- mostly a combination of man-to-man and 1-2-2 zone alignments -- slowed the Falcons down enough to keep the Warriors in the game.
Scoring was as difficult as making a gain on Wall Street, as Poolesville put in extra effort to limit Warriors center Brynn Arnone.
Boonsboro's defense held Poolesville without a basket for nearly an eight-minute span over the second and third quarters, but the Warriors still trailed 18-12 at the half and 21-16 with 6:10 remaining in the third quarter.
A quick 5-0 burst on a bucket by Arnone and a three-point play by Ashley Smothers knotted the game at 21 with 5:18 left in the quarter. But the Warriors could never take the lead.
Lindsay Poss scored Poolesville's last eight points in the third quarter to give the Falcons a 30-28 lead.
Boonsboro forged one more tie at 32 on a 15-foot jumper by Katie Marshall with 5:43 remaining, but it signified the Warriors' last hurrah.
"We've done that all year," Shaffer said. "We'd play real well and get back in the game or get a big early lead and then we'd slack off offensively."
It happened again, one last time.
Poss scored three more of her game-high 15 points in a 7-1 run to give Poolesville a 39-33 lead with 41.7 seconds remaining. Boonsboro tried to foul to get back into the game, but all efforts came up empty.
Emma Dalton led Boonsboro with 12 points while Arnone and Smothers finished with 11 each to account for 34 of the Warriors' 38 points.
"We finished 16-7 ... that's not bad," Shaffer said. "We won back-to-back conference championships and we won by playing as a team. It was a good year."
Poolesville 43, Boonsboro 38
Winning 3, Keese 6, Lowe 3, H. Crittenden 8, Poss 15, Bateman 5. Totals 16 9-19 43.
Smothers 11, Dalton 12, Marshall 4, Arnone 11. Totals 15 7-15 38.
Poolesville 15 3 12 13 -- 43
Boonsboro 7 5 16 10 -- 38
3-point goals -- Poolesville 2 (Poss 2), Boonsboro (Dalton). Fouled out -- J. Crittenden, Marshall.