OK, Peach, just for all you do. Here is the number of countries for each season as best I can determine it (Corsica/France counts as 1, Sicily/Italy counts as 1, Hong Kong/China counts as 1 and Macau/China counts as 1, U.S. does not count at all, even in AR8):
AR1 - 7
AR2 - 7
AR3 - 10
AR4 - 8
AR5 - 10
AR6 - 10
AR7 - 10
AR8 - 3
AR9 - 9
AR10 - 10
AR12 - 9
AR13 - 7
AR14 - 8
AR15 - 8
AR16 - 8
AR17 - 9
AR18 - 8
My numbers differ quite a bit from yours. Does yours only include Pit Stops?
TAR1: Should we count South Africa as visited? Teams made their way by land from one airport to another in Johannesburg. This would make the total 8 countries.
TAR3: Teams travelled from Portugal through Spain to get to the ferry to Morocco. I make it 11 countries.
TAR7: Puerto Rico is a territory of the USA, so I make this season only 9 countries.
TAR10: flamant is right, there were indeed 12 countries.
TAR11: Zanzibar is a Tanzanian territory, Hong Kong & Macau are both Chinese and Guam is a territory of the USA. Therefore I make this season 8 countries.
TAR1 - 8
TAR2 - 7
TAR3 - 11
TAR4 - 8
TAR5 - 10
TAR6 - 10
TAR7 - 9
TAR8 - 3
TAR9 - 9
TAR10 - 12
TAR11 - 8
TAR12 - 9
TAR13 - 7
TAR14 - 8
TAR15 - 8
TAR16 - 8
TAR17 - 9
TAR18 - 8
It is obvious that I made different assumptions and you have done a good job of highlighting them. Transit points where no tasks take place do NOT count in my scheme of things. Therefore,
1. AR1 - South Africa is ignored
2. AR3 - Spain is ignored
3. Puerto Rico is indeed a territory of the U.S. and so is Guam, but I consider both of them as distinct countries for the purpose of counting.
However, Zanzibar Island is definitely part of Tanzania, but I assumed that in my count. According to my rules of counting 9 is still correct for AR11.
The show's general rule seems to be that a country must be mentioned in a clue for it to count. (The only exceptions to this are the times identifying the country is part of the puzzle, ie. the Tunisia and Malaysia flags and the "what country is this major African capital city in?" tasks with Ouagadougou and Accra, and the starting countries themselves.)
The official tally, with notes where needed:TAR1 - 9.
Includes South Africa, excludes Botswana and the Vatican (from unused tasks), and the quick zipline across to the Zimbabwe side of Batoka Gorge for the canyon swing.TAR2 - 8.
Excludes Argentina, where the island used for Leg 2's Road Block technically is.TAR3 - 13.
Includes Spain, Austria, and Malaysia (despite the winners skipping Austria entirely), and counts England and Scotland separately.TAR4 - 9.TAR5 - 12.
Includes Kenya, despite only being used as a connecting airport.TAR6 - 11.
Treats Corsica and France as one country.TAR7 - 10.
Treats Puerto Rico as part of the United States (despite casting not doing so).TAR8 - 4.TAR9 - 10.
Treats Sicily and Italy as one country.TAR10 - 13.TAR11 - 10.
Counts Zanzibar as part of Tanzania, the SARs as part of China, and Guam as part of the US.TAR12 - 10.
TAR13 - 8.
TAR14 - 9.
Includes Germany but excludes Italy, which seven out of eleven teams (but not the winners) travel through during Leg 1.TAR15 - 9.
TAR16 - 9.
Excludes Belgium and possibly Luxembourg, which the Portable Pit Stop bus apparently travelled through on its way from Hamburg to Champagne.TAR17 - 10.TAR18 - 9.TAR19 - 8
, assuming no non-spoiled countries turn up between now and the end of the season.TARA1 - 8
. Includes Singapore.TARA2 - 10
. Includes Hong Kong and Germany.TARA3 - 6.
Counts the SARs together as part of China, counts Taiwan separately.TARA4 - 8.TAR Australia 1 - 12.
Includes the Netherlands and Singapore, and counts the SARs together as "China".TAR China Rush 1 - 1.TAR China Rush 2 - 1.TAR Brazil - 2TAR Latin America 1 - 9.
TAR Latin America 2 - 8
TAR Latin America 3 - 5?TAR Israel 1 - 7.
SARs counted as one, once again.TAR Israel 2 - 9.
Media released as nine, but only seven are currently known.