Captain Joseph Yobo and Obinna Nsofor scored second-half goals to give Nigeria a vital 2-0 win over Madagascar in African Cup of Nations qualifying Sunday. Yobo, playing his 82nd international match, converted John Obi Mikel's corner in the 68th minute before Nsofor sealed the win with a spectacular long-range shot in the 75th. Nigeria is second on 10 points in the Group B standings. Guinea leads by three points after a 1-0 win over Ethiopia Sunday. The group winner will be decided when Nigeria hosts Guinea next month. Ethiopia, with four points, and Madagascar, with one, cannot qualify. Qualifying for the 2012 Africa Cup of Nations is set for a thrilling climax, with 21 teams chasing 10 places in Equatorial Guinea and Gabon when the final fixtures are played in October. Burkina Faso and Senegal clinched places at the weekend to join already qualified Botswana and Ivory Coast, while the co-hosts are automatic participants in the three-week African football showcase.