hello.For private key 2 the x and y values of pubkey are

c6047f9441ed7d6d3045406e95c07cd85c778e4b8cef3ca7abac09b95c709ee5
1ae168fea63dc339a3c58419466ceaeef7f632653266d0e1236431a950cfe52a

i change generator points of elliptic curve to the values above.
let us assume we want to bruteforce scan the puzzles 1 to 20.
end range of puzzle20 is 0x100000 and normaly we would scan 1:100000 but as i changed G I divide the range by 2
therefore new reduced scan range is 0x1 to 0x80000

they keys found are:
4
26
70
101
A30
1498
649B

now we multiply by 2 and get correct prvkeys for seven puzzles 4 7 8 10 13 14 16

we miss thirteen keys and i understand that it didnt find them because they are and our scan used even.

someone please show what are the exact steps to find also rest keys within that range?

please show example with private key 4 for understanding