What is Winter Variation?
Winter Variation is a last slot method where you orient all your top layer corners while inserting the last pair.
How is this useful?
Well, if all your edges are already oriented, you will get an OLL skip!
What about recognition?
Recognition really isn't that bad to be honest. The 0 corner oriented cases are the only ones that can be tricky to recognize quickly in solves.
PDF of the page
https://docs.google.com/document/d/1q2fJ1SKIU7ZtL7lq8yxC-tjmJrgi_9UWdd3vSjIuUz0/edit?usp=sharing
3 Corners oriented
(U') l' U2 R U2 r' U2 L
R U' R D R' U R D' R' U' R'
(U2) L' U2 R U' R' U2 L
2 Corners oriented
R U' R'
U' R' F R U R U' R' F'
R2 D R' U' R D' R2
R U' R' U R' U' R U' R' U2 R
U' R U' R' U2 R U' R' U2 R U R'
(U2) R' D' R U2 R' D R2 U' R'
R U R' U' R U' R'
1 Corner oriented
(U) R U' R' U R U2 R'
L' U2 R U L U' L' U R' U2 L
R U R2 U' R2 U' R2 U2 R
(U) R' U' R2 U' R2 U2 R
R U' x' U R' D R U' R' D'
(U) R U2 R2 U' R U' R' U2 R
(U) R2 D R' U2 R D' R2
(U) L' U R U' L U2 R'
(U') L' U R U' R' L
(U) R U' R' U' R' F R U R U' R' F'
(U) R U2 R'
(U') R' F' R U2 R U2 R' F
(U) L' U R U' R' L U' R U' R'
0 Corners oriented
R U' R' U' R U R' U R U2 R'
R U' R2 U2 R U R' U R
R2 D R' U R D' R' U2 R'
(U) R' U L U' R2 U L' U R'
(U) R U' R' U R U' R' U R U2 R'
(U) R U2 R2 U2 R U R' U R
R U' R2 U' R U' R' U2 R
R U R' U' R U R' U' R U' R'