The Scottish quartet have been in command all through in opposition to the Germans, main 5-2 on the break earlier than accelerating clear, however the hitherto unbeaten Swiss proved extra stubborn opposition.
Mouat’s males led 3-2 on the break – a steal within the third proved the distinction – and it took till the seventh finish for both facet to register a rating better than one.
It was the Swiss who did it, to steer 4-3, nevertheless it all got here all the way down to the final finish.
Britain wanted one to tie, two to win. They needed to accept the previous, which means an additional finish. However Switzerland had the hammer and so they held their nerve to shut out a press release victory.
“On one other day we come away with the win,” Mouat advised BBC Sport.
“It’ll be powerful to beat them however we all know we’re taking part in fairly properly and it will be thrilling to play them once more.”
Earlier within the day, Britain’s girls have been unable to repeat their assertion win over Canada in opposition to the Swedish rink who denied them European gold in November.
The unbeaten Swedes raced out to a 7-3 lead on the break – after twice scoring three with the hammer – and stole one within the sixth to take a stranglehold on the sport.
Rebecca Morrison’s rink stored preventing however finally fell to a 10-7 defeat to go away their semi-final hopes within the steadiness.
At the least 4 wins shall be required from their remaining 5 round-robin matches to have any hope of reaching the knockouts.
“It is actually onerous at this degree – it is near-misses and we’re a few centimetres away from making nice pictures,” Morrison advised BBC Sport.
“It is irritating however that is what occurs on the Olympics. It’s essential to be at your finest and we simply weren’t fairly there.”
The ladies are again on the ice in opposition to Denmark (08:05 GMT) and Switzerland (18:05) on Monday, whereas the lads face Norway (13:05).


