Kimi Raikkonen has a good start from pole position and team-mate Pedro de la Rosa moves up to second past Felipe Massa
Title rivals Michael Schumacher and Fernando Alonso move up the field with ease after starting 11th and 15th on the grid
Raikkonen walks back to the pits after driving his McLaren into the back of Vitantonio Liuzzi's Toro Rosso on lap 26
As the rain stops in Budapest the track begins to dry out and Britain's Jenson Button puts pressure on race leader Alonso
Alonso retires on lap 52 and Button must now keep his cool to guide his Honda home to win his first ever Grand Prix
Schumacher's hopes of podium finish are ended with only three laps to go as he is forced to retire
Button raises his fist in the air after crossing the line first at the Hungaroring to take the chequered flag
Britain's David Coulthard also profits from all the retirements in Budapest as he finishes fifth behind Rubens Barrichello
You can see the relief and the joy in Button's eyes after the 26-year-old finally wins a race in his 113th start
Button stands atop the podium with McLaren's De la Rosa and BMW Sauber's Nick Heidfeld who finished second and third
Button celebrates after starting from 14th and mastering the changeable conditions to win the Hungarian Grand Prix
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