Final score: Scotland 18-19 Ireland
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LATEST UPDATES, ALL TIMES GMT
Full-time: "It was desperate. From an Irish point of view, it shows where we have got to that we can be upset despite winning the Triple Crown."
BBC rugby pundit Keith Wood
"There was no creativity from either team but Scotland will be happy enough with a one-point defeat."
BBC rugby pundit Andy Nicol
"My God! What a game! My heart is in overdrive..... which is more than most of the Irish players. A win, is a win, is a win. Well done Ronan from all the Celts in Moscow. We will be singing 'The Fields...' as well as 'The Flower...' tonight."
James, Moscow, via email
80 mins: Ireland get hold of the ball and carefully keep it until the referee calls time. Ireland wing Denis Hickie is named man-of-the-match but as the whistle is blown, Ronan O'Gara stays down and the teams frantically wave on the physios. He soon gets up and is ok.
78 mins: This has built up into a real cliffhanger. Scotland just need a drop-goal but waste their latest foray into the Irish half.
76 mins: Brian O'Driscoll makes a stunning break but as the action moves elsewhere, he stays down, grimacing and clutching his right shoulder. Slowly and gingerly, O'Driscoll gets to his feet and rotates his arm a few times before jogging back upfield to get on with the game.
73 mins: Ireland are getting a bit more of the ball and making more inroads than they have for the last 50 minutes. Another penalty comes their way for a Scottish offside but Ronan O'Gara, with Peter Stringer doing the old finger on the ball trick, leaves it short.
69 mins: PENALTY Scotland 18-19 Ireland
Scotland are in danger of shooting themselves in the foot with another penalty against them. Ronan O'Gara regains the Ireland lead.
67 mins: PENALTY Scotland 18-16 Ireland
Ronan O'Gara narrows Ireland's deficit to two points with another kick.
66 mins: PENALTY Scotland 18-13 Ireland
Scotland's Chris Paterson stretches the lead with his 20th straight successful penalty kick. Not all in this match, though, obviously.
64 mins: "I'm struggling to figure this out. Ireland are ultimately getting what they deserve. They're playing sloppily and with a lack of aggression."
BBC rugby pundit Keith Wood
62 mins: Scotland turn over an Ireland move in their own half and hack forward to turn defence into attack. But they squander the oppportunity by giving away a penalty. Ireland, though, make another mistake with a missed touch and Scotland come again.
59 mins: PENALTY Scotland 15-13 Ireland
Scotland win a penalty and Chris Paterson attempts an immediate drop-goal which drifts right of the posts. But he gets another attempt from the floor and Scotland go in front.
56 mins: Scotland pin Ireland back in their 22 and a sliced Shane Horgan kick gives the home side a promising attacking line-out on the left. But after a couple of phases Ireland win a scrum. Ireland, though, hand the advantage straight back as Paul O'Connell runs into team-mate Gordon D'Arcy and Scotland get a scrum on the Irish 22.
54 mins: Scottish lock Scot Murray is wearing orange gloves. "Good for nettles," according to my colleague Sophie.
52 mins: Naughty boy Nathan Hines is back on for Scotland, who far from conceeding points while they were a man down, actually gain three.
49 mins: PENALTY Scotland 12-13 Ireland
Scotland's pack nudge their way forward and eventually win a penalty midway between the 22 and halfway on the right. Chris Paterson is on target.
"There is a lack of fizz from Ireland. They're at 95% and at this level if you're not at 100% that can make a huge difference."
BBC rugby commentator Phillip Matthews
47 mins: Brian O'Driscoll again races clear down the left and this time finds wing Denis Hickie. The Irishman pins back his ears but Scotland's big, blonde left winger Sean Lamont hares over and hammers him into the corner flag. The video referee says "no try".
44 mins: Ireland skipper Brian O'Driscoll slips through the Scottish line in the middle of the pitch but Shane Horgan offloads a poor forward pass with Denis Hickie begging to be put clear ont the left wing.
41 mins: Ronan O'Gara kicks off the second half. Scotland gather deep in their 22 but Marcus Di Rollo is forced into a rushed kick as Brian O'Driscoll looms over him. But Scotland are holed early when Nathan Hines is sin-binned for not rolling away following repeated warnings in the first half from the referee.
Half-time: "Ireland started well - they were making breaks from everywhere on the field but since then Scotland have been the better side."
BBC rugby pundit Gregor Townsend
"I don't think Ireland have got to third gear yet. They're playing very flat. It's like a collective hangover from two weeks ago. They're playing at a very sub-par level and Scotland have eked their way back in and will be very pleased with this."
BBC rugby pundit Keith Wood
39 mins: PENALTY 9-13 Ireland
An Irish infringement at the breakdown gives Chris Paterson another crack at the posts and he accepts the points. The referee immediately blows for half-time.
36 mins: PENALTY Scotland 6-13 Ireland
Ireland cancel out the Scotland penalty with three more points from a long-range Ronan O'Gara shot.
35 mins: PENALTY Scotland 6-10 Ireland
Chris Paterson gets Scotland back to within four points after big John Hayes infringes at the scrum.
31 mins: Scotland race into Irish territory from the re-start and win a five-yard scrum. The ball comes out to the right wing but Ireland's defence stays firm and a Scottish knock-on alleviates the threat.
30 mins: TRY Scotland 3-10 Ireland
Scottish fly-half Dan Parks tries to clear but Ronan O'Gara charges it down. Gordon D'Arcy and Simon Easterby charge up in support and feed O'Gara, who dives over for the first try. O'Gara converts.
27 mins: Ireland plough forward by inches with more than a dozen phases of forward bludgeoning. The ball eventually comes out to the backs, but Ronan O'Gara is felled by a late tackle. Irish captain Brian O'Driscoll reacts and trades blows with Scottish counterpart Chris Paterson, sparking some more general argy-bargy.
24 mins: The Murrayfield faithful are on their feet as wing Sean Lamont sets off a snaking run from an Irish up-and-under. He feeds the supporting Chris Paterson and Scotland surge into the Irish 22. Paterson is penalised for hanging on but an Irish boot to his head sparks a brawl as everyone gets a bit over-excited.
22 mins: Ireland press again but a Paul O'Connell knock-on in the line-out gives Scotland breathing space. It's a dry but blustery day, by the way.
"We're enjoying this broadcast having watched a glorious sunset here in Kerala in India. Let's hope for a better result that the Italian game and 3-3 is an encouraging start."
John and Frances Kerr, via email
18 mins: Scotland are just beginning to ease their way into the game. A few scraps of possession have yielded a couple of moments of promise but the Irish backs are definitely giving their counterparts a thorough examination.
15 mins: PENALTY Scotland 3-3 Ireland
Scottish fans finally get a chance to scream as Chris Cusiter embarks on a sortie down the Irish right. The move peters out but Scotland win a penalty and Chris Paterson slots it over.
11 mins: A surging Irish break down the right involving Brian O'Driscoll gives the visitors another attacking platform. But a long pass out to the left is just too far in front of the outstretched Girvan Dempsey and Scotland are let off.
8 mins: From the re-start, Gordon D'Arcy slips a Scottish tackle and surges clear behind opposition lines. The home side's defence is looking flaky so far. Ireland win another penalty in Scotland's half and Ronan O'Gara points at the posts. This time, though, he drags it left.
7 mins: PENALTY Scotland 0-3 Ireland
Ireland have already made several half-breaks over the gain line and their early pressure yields a penalty which Ronan O'Gara strokes over from just inside the 22.
5 mins: Murrayfield is roaring to cries of "Ireland, Ireland, Ireland" and the men in green are definitely on the front foot early on.
4 mins: Ireland win a penalty in midfield and Peter Stringer takes a quick tap, feeding Paul O'Connell who chews up the field with his giant strides, sparking a very promising position. Stringer joins in again but a chip-on leads to a line-out from which Scotland clear.
2 mins: A slightly stodgy start but Scotland win an early penalty and Dan Parks buys some yardage for his forwards with a kick deep into the right corner.
1330: Dan Parks kicks off for Scotland and gives it the old schoolboy favourite - "the funny one" to the non-forwards side.
PRE-MATCH BUILD UP, ALL TIMES GMT
1325: Ok folks, five minutes to kick-off, Ireland are in a huddle on the pitch and the bagpipes are blaring out around a jam-packed Murrayfield. Scotland run out to loud cheers as the home crowd implore their side not to repeat the opening seven minutes against Italy when they went 21-0 down.
Thanks for all your emails from around the world - as well as those featured on this page, we've had messages from place such as Toledo, Louisville, Abu Dhabi, Liberia, Kosovo, Turkey, Boston, Canada, Hong Kong, Melbourne.
Ireland have just sung Ireland's call and now Murrayfield joins the Princess Royal to belt out Flower of Scotland.
1317: "The last fortnight has felt like forever and we just can't wait for the opportunity to play in front of our crowd and make amends. If you're too conservative you can't beat the second best side in world - and possibly the best Irish side of all time - so we need to be bold, but excellent in defence."
Scotland coach Frank Hadden
1315: "Waikiki beach Hawaii... pubs are closed so we are on line to cheer on Ireland by 25 + pts as we continue our warm up for the World Cup."
Brian, Honolulu, via email
"Come on Scotland. Pull some of that magic out the bag for us. Good luck."
Fiona, Sahara Desert, Algeria, via text message
1310: "Hopefully, Scotland will respond in a very positive manner. They must play a bit smarter. This Irish team don't need any help."
BBC rugby pundit Andy Nicol
"I don't think Ireland will play as well as a few weeks ago but they'll play well enough to win comfortably here."
BBC rugby pundit Keith Wood
"Joe in Nepal. If you're the Joe from Renmore, Evelyn says hello."
Michael Morley, via email
1307: "Sitting in front of my monitor at work realising I will only get back to my accommodation after the match. Arrived seven minutes into Scotland's last game v Italy to find score was Scot 0-21 Italy. Today will be a different story. Scotland by 3, I hope."
JFK2, Eket, Nigeria, via email
1300: "Just seen the betting on who will score most points - Ronan O'Gara or Scotland..."
Chris, via email
"Good luck Ireland from all in Fiddlers Irish bar in New York city. Can't wait for the match to start, good luck Wales and England in the other two games. Ireland for the Triple Crown and maybe the Six Nations."
Eugene Molloy, via email
1250: "Hi all. We are in a wet and windy Moscow, getting ready to watch the Irish win their fourth Triple Crown, in five years. Oh, how I wish I was in Murrayfield, my favourite Six Nations venue."
James, Moscow, via email
1244: Have just heard John Inverdale, on an in-house feed of the production team setting up, read out the introduction to Frank Hadden's programme notes.
The Scotland coach writes: "I would like to offer an apology to all of you for the last match."
"It's 4:35am in Seattle, WA, USA and we are heading for the Fado Irish Pub, the only place to watch the match in the city. Madness prevails! Go Ireland."
Paul Murray, via email
1242: "Here I am in Nepal trying to find a way to look at the match. Unfortunately, I am not able to, however I will be able to enjoy all the banter on the web. Come on Ireland, let's hammer the Scots (sorry fellow Celts ). Another triple crown for us, by at least 24 points."
Joseph, Kathmandu, via email
"To Philippe, Esnault. It's on ESPN in Asia. I'm sure it's on the same channel in Seoul."
China, via email
1240: "Me and my mates are at work in Chongqing, China. We can't wait for Scotland to give the Irish a good hammering. The game's on live here so we'll be off down the pub soon. Cheers and all the best."
Chongqing, via email
1235: "Ireland are 14 point favourites. Surely there's easy money to made on the Scots on the spread. Or am I oblivious to how bad the Scots are?"
Campbell Hughes, via email
1225: "We're sitting here in front of the computer in Perth, Western Australia eagerly awaiting commentary. Two Super 14 matches have been on which was a great build up to the big one tonight. Hopefully Ireland by about 15."
John, Perth, via email
"Hi, I am desesperate to find a way to watch Scotland-Ireland and Wales-Italy matches today from Seoul. Any tips?"
Esnault, South Korea, via email
1200: Just 90 minutes to go to the first of the day's two Six Nations matches between Scotland and Ireland at Murrayfield.
The visitors will clinch their third Triple Crown in four years with victory.
Are you on your way to Murrayfield, in the ground, having a pre-match drink in a pub near the ground, logging into the website from around the world, or following the build-up on your phone while you do the weekly shopping?
Why not let us know how you are building up to the whistle, what you have spotted on your way to the match or wherever you are going to watch it and how you think the game will go.