Stephen Donald shined for the Chiefs yet again as his team sealed the top spot on the Super 14 table with other matches to come in the final round of the Super14's scheduled matches after they beat the Brumbies 10-7.
Chiefs flyhalf Stephen Donald scored all of his team's points for the second straight week as they booked a semifinal for only the second time in their history and first since 2004 - when they were beaten by the Brumbies.
All Black Donald scored and converted a try in the 36th minute of the first half, replying to a try three minutes earlier by Brumbies winger Francis Fainifo, leaving the teams tied 7-7 at halftime.
Donald's 67th-minute penalty provided the only points of the rain-soaked second half and lifted the Chiefs into first place.
They will play their semifinal most likely next Saturday in Hamilton.
"We're absolutely delighted," Chiefs captain Mils Muliaina said.
"It was pretty tough. It wasn't a spectacle but we achieved what we wanted to achieve."
" We're excited. A win's a win. We're into the top four so what more can you ask for?"
The Brumbies took a consolation bonus point for losing by fewer than seven points, lifting them to fourth on the table and giving them a slight chance of reaching the semifinals.
Five teams remain in competition for the three remaining semifinal spots.
"This result leaves us in the four but we need a few unlikely results to go our way," Brumbies captain Stephen Hoiles said.
The Chiefs can finish no worse than second, but could yield first place to South Africa's Bulls if the Bulls beat compatriots the Sharks in the final match of the regular season on Saturday.
The Chiefs dominated the match territorially but struggled to make any inroads against a solid Brumbies defense.
Almost 34 minutes of the match had elapsed before Fainifo scored the first try, pursuing a kick by fullback Adam Ashley-Cooper which was inadequately defended by Chiefs winger Lelia Masaga.
Stirling Mortlock converted to lift his record tally of points in Super 14 matches to 996.
The Chiefs hit back almost immediately with a try to Donald.
Masaga atoned for his earlier defensive lapse with a strong break down the right-hand touch and the ball moved infield to Donald who pierced the defense, then tied the scores with the conversion of his own try.
The second half was similarly hard-fought and featured few scoring chances, though the Chiefs developed a 71 percent territorial advantage.
The Brumbies disrupted the Chiefs' scrum and lineout and turnovers limited both teams' continuity.
The teams were level on points for most of the match but in the 67th minute (Manny) Huia Edmonds was sent to the bin with yellow card which allowed Stephen Donald to kick a penalty and take the lead and the victory.
Pen - Stephen Donald
Con - Stephen Donald
Tries - Francis Fainifo
Con - Stirling Mortlock
Referee: Stuart Dickinson (Australia)
Touch judges: Chris Pollock (New Zealand), Ben Skeen (New Zealand)
Television match official: Shane McDermott (New Zealand)
Assessor: Glen Wahlstrom (New Zealand)
Chiefs : 1. Ben May,2. Aled de Malmanche,3. James McGougan ,4. Craig Clarke,5. Kevin O’Neill ,6. Liam Messam,7. Tanerau Latimer,8. Sione Lauaki,9. Brendon Leonard,10.Stephen Donald,11.Sitiveni Sivivatu,12.Callum Bruce,13.Dwayne Sweeney,14.Lelia Masaga,15.Mils Muliaina (captain)
Reserves:,16. Hika Elliot,17. Sona Taumalolo,18. Toby Lynn,19. Serge Lilo,20. Toby Morland,21.Mike Delany ,22. Sosene Anesi,
Brumbies : 1. Ben Alexander, 2. Stephen Moore/Huia Edmonds, 3. Guy Shepherdson, 4. Ben Hand , 5. Peter Kimlin , 6. Julian Salvi , 7. George Smith,8. Lauaki(c) , 9. Patrick Phibbs , 10. Matt Toomua , 11. Francis Fainifo , 12. Tyrone Smith , 13. Stirling Mortlock , 14. Clyde Rathbone ,15. Adam Ashley-Cooper
Reserves:16. Huia Edmonds/John Ulugia, 17. Salesi Ma'afu,25. Sitaleki Timani,16. Henry Vanderglas , 17. Joshua Holmes , 18. Afusipa Taumoepeau,19. Sanualio Afeaki