had opened, some under the auspices of the Grammar Schools Act – in the immediate region, these included Brisbane Grammar School in 1868, Gregory Terrace in 1875, Toowoomba Grammar School in 1877 and Nudgee College in 1891. When competition with Brisbane Grammar commenced, Australian rules football was the chosen code. The first competitive match between the two schools was played in 1870 under these rules – the outcome was a draw. These early games were exceptionally long – the match between IGS and Brisbane Grammar in 1876 commenced at 10.30am and ended at 2.30pm, at which time IGS had scored 6 goals to Brisbane Grammar's nil. Incidentally, rugby union was adopted as the official code in 1887, only to be replaced by rugby league when the Queensland Great Public Schools (GPS) system commenced in 1918. In 1928, the code was again changed to rugby union, where it has since stayed, although due to popular demand, Aussie Rules was reintroduced in 1995 as part of the Independent Schools Australian Rules Football Competition. Competitions between the Grammar Schools in these years became more frequent. In 1878, the first Inter-Grammar School sports held for Athletics were held, with IGS prevailing over Brisbane Grammar School and Toowoomba Grammar School. IGS won two successive grammar school rowing regattas in 1891 and 1892, but floods in Ipswich destroyed the School's rowing shed and equipment and IGS has not competed in rowing competition since. The first tennis match between IGS and Brisbane Grammar was played in 1893, with IGS emerging victorious. IGS also claimed victory in the first cricket match between the two schools – but the actual scores have been lost. Middle years By the time of the silver jubilee of IGS in 1913, attended by Sir William MacGregor, Governor of Queensland, the School had erected an Honour Board, new boarding facilities and a Science Block, leading to the teaching of physics and chemistry in a laboratory. The Chelmsford Cup series (the precursor to the GPS system, named after then Governor of Queensland, The Lord Chelmsford) was established in 1907 for competition between the existing Grammar Schools, and the inauguration of the Old Boys Association followed the next year. The University of Queensland was opened in Brisbane in 1909, improving student attendance. The Chelmsford Cup series existed alongside the new Great Public Schools, or GPS, system from 1918 to 1938, at which time it was discontinued