The Edinburgh winger was successful with seven penalties from seven attempts as Frank Hadden's side registered their first win of this season's championship.

Opposing skipper Stephen Jones converted three penalties for Wales but Gareth Jenkins' outfit slumped to their second successive defeat of the campaign.

The home side started in terrific fashion, running at Wales with power and purpose and forcing the visitors into conceding two penalties, which Paterson converted.

Captain Stephen Jones put Wales' first points on the board in the 22nd minute with a straightforward penalty after Hugo Southwell had failed to release the ball in a ruck.

Hadden's men put together their most fluent move of the match just before the interval as backs and forwards combined to stretch Wales from one side of the pitch to the other and, when the visitors' discipline cracked, Paterson made 9-3 three minutes before the interval.

But Wales responded immediately and Jones slotted a beautiful penalty from the left-hand touchline to keep his side well in touch after the opening 40 minutes.

Wales started the second period poorly though and, when Ryan Jones dangerously tried to offload inside his own 22, Scotland number eight David Callam had the line at his mercy but knocked on clumsily.

Ceri Sweeney filled in for Kevin Morgan while he was in the blood bin and the Dragons utility back's first action was to block Paterson off the ball, the Scotland captain making no mistake with the penalty to put his charges 12-6 ahead in the 50th minute.

The kickers then traded penalties but it was Scotland who continued to pile forward, forcing another penalty - which Paterson kicked to make it 18-9 - and seeing Wales hooker Rhys Thomas yellow carded.

Paterson almost scored the first try on the hour mark when he chipped ahead and gathered with a clear run to the line but opposite number Stephen Jones tackled him just inches short.

A minute later, Jacobsen thought he had burrowed over but referee Alan Lewis was not certain the prop had grounded the ball and television match official Rob Debney agreed Shanklin had indeed held up the Edinburgh forward.

Paterson put the seal on the win with his seventh penalty a minute from time and Scotland will now face Italy in a fortnight in Edinburgh with some confidence under their belts, while Wales will travel to France with some trepidation.