Back-Lay Arbitrage is a bet that you will have a guaranteed winning with any outcome of the event. A Back-Lay Arbitrage is a result of the difference between odds of different bookmakers (back) and exchanges lay odds in a way that, in the correct proportions, your stake is lower than your winnings for any outcome. The Back-Lay Arbitrage occurs when a back odd is higher then the equivalent lay odd, so you can back the odd and lay it using lower ratio.

Event	Date	Result	Lay	Odd	Back	Odd	Profit
FC Lokomotiv Moscow vs Amkar Perm Soccer> Russia> Russian Premier League	06-Jul 16:00	Home 1X2	Betfair	1.74 44.7%	Europlay	1.90 55.3%	5.1%
Internacional vs Coritiba Soccer> Brazil> Brazilian Cup	06-Jul 20:00	Home 1X2	Betfair	1.75 44.2%	Europlay	1.85 55.8%	3.2%
RoPS Rovaniemi vs Koo Tee Pee Soccer> Finland> Finnish 1st Division	06-Jul 16:30	Home 1X2	Betfair	1.53 35.7%	Europlay	1.60 64.3%	2.9%
FK Ekranas vs Rosenborg Trondheim Soccer> International> Intertoto Cup	06-Jul 15:00	Over 2.5	Betfair	1.99 51.1%	Racebook	2.10 48.9%	2.7%
Odd Grenland vs Sogndal Soccer> Norway> Norwegian 2nd Division	06-Jul 17:00	Over 2.5	Betfair	1.54 35.9%	Racebook	1.60 64.1%	2.5%
FK Ekranas vs Rosenborg Trondheim Soccer> International> Intertoto Cup	06-Jul 15:00	Away 1X2	Betfair	1.64 39.9%	Europlay	1.70 60.1%	2.2%
Lillestroem SK vs Lyn Oslo Soccer> Norway> Norwegian 1st Division	06-Jul 17:00	Home 1X2	Betdaq	2.15 54.6%	Astrabet	2.25 45.4%	2.1%
FC Zenit St Petersburg vs Tom Tomsk Soccer> Russia> Russian Premier League	06-Jul 15:00	Home 1X2	Betdaq	1.55 36.2%	Europlay	1.60 63.8%	2.1%
JJK JYVASKYLA vs TPV Soccer> Finland> Finnish 2nd Division	06-Jul 16:30	Home 1X2	Betfair	1.55 36.2%	Racebook	1.60 63.8%	2.1%
IFK Mariehamn vs Tampere Soccer> Finland> Finnish 1st Division	06-Jul 16:30	Away 1X2	Betfair	2.58 62.3%	Europlay	2.70 37.7%	1.8%
Tromso vs Stroemsgodset Soccer> Norway> Norwegian 1st Division	06-Jul 17:00	Home 1X2	Betfair	1.84 46.4%	Europlay	1.90 53.6%	1.7%
Jaro FF vs VPS Vaasa Soccer> Finland> Finnish Veikkausliiga	07-Jul 16:00	Home 1X2	Betfair	2.40 59.3%	Racebook	2.50 40.7%	1.7%
BotafogoRJ vs Gremio Soccer> Brazil> Brazilian Cup	06-Jul 22:15	Home 1X2	Betfair	2.30 57.4%	PartyBets	2.38 42.6%	1.5%
Viking vs Fredrikstad Soccer> Norway> Norwegian 1st Division	07-Jul 18:00	Home 1X2	Betfair	2.04 51.7%	Europlay	2.10 48.3%	1.4%
Valur Reykjakvik vs Fram Reykjavik Soccer> Iceland> Icelandic Premier League	06-Jul 20:15	Home 1X2	Betfair	1.95 49.4%	Europlay	2.00 50.6%	1.3%
Sao Paulo vs Ipatinga Soccer> Brazil> Brazilian Cup	06-Jul 22:15	Home 1X2	Betfair	1.33 25.1%	Racebook	1.35 74.9%	1.1%