More I think about it more I think it's broken (maybe because of painting technique?)  (that is why she posted new picture - and she says that nowhere she said it was a clue - maybe she gave up on this but it's bad PR to said that people have followed broken puzzle for 3 years).

I have few observations and questions, maybe it will help someone.

1) We have 17 leaves, 17x3=51 characters of WIF. WIF is encoded in Base58 (26 letters capital and small and numbers without O, 0, l, I, +, / - so it's smaller Base64).
Could anyone tell me what's the lowest bit number to encode it ? Is 6 bits enough or we need at least 7 ?

2) Notice that queen is not transparent (you can't see chessboard under) except base, where you can clearly see red chess tile (so that you don't mase mistake and assume other colour). Maybe it's important?

3) You say that orange flames are not important. I disagree. If they were not important, she could paint colorful flames more fat? For one thing, they determine the exact place of our 3-coloured friends.

4) What about 6 ribbons on key? Maybe they are some sort of checksum? Like you know, a in Base64 or Q in Base58, when you invented some sort of method to decode chessboard tiles and you stumble apon tile with ribbons on it you can verify?

5) also notice that keyhole along with roots of branches of vines (where they punch through chessboard) are never inside tile, always on borders. Interesting.

That is all for now, I'm going to bed. I have already trouble in work because of this %$#@#$ puzzle, so tomorrow only read some or post but no quality analysis. Fortunatelly I switched off computer during weekend and manage to have a great time with kids, it was worth it.