<Tr> <Td> 1946 </Td> <Td> Cary Middlecoff </Td> <Td> United States </Td> <Td> + 5 </Td> <Td> T12 </Td> </Tr> <Tr> <Td> 1947 </Td> <Td> Frank Stranahan </Td> <Td> United States </Td> <Td> − 5 </Td> <Td> T2 </Td> </Tr> <Tr> <Td> 1948 </Td> <Td> Skee Riegel </Td> <Td> United States </Td> <Td> + 5 </Td> <Td> T13 </Td> </Tr> <Tr> <Td> 1949 </Td> <Td> Charles Coe Johnny Dawson (2) </Td> <Td> United States United States </Td> <Td> + 7 </Td> <Td> T16 </Td> </Tr>

What is the 10 shot rule at the masters