. If you switch colors on an odd turn, then the square she lands on will become an even square; if you switch colors on an even turn, the square will become an odd square.

×In your demo, the queen is on (10,26) on Turn 12, an even turn. You want this to be an odd turn.

Your current process produces these states on earlier turns:

-Turn 10 (even), queen is on White squares

-Turn 11 (odd), queen is on Black squares, queen can only reach (10,26) in an odd number of turns

In other words, the state after the color switch is:

-Odd turn

-Current square has different parity from the target square

You want a different turn parity when you reach (10,26), so you want the state immediately after switching colors to either be "

same parity tile on an odd turn"

or "

different parity tile on an even turn"

. If that's not enough to get it, I'll tell you where I switched colors in the next secret text.

Click here to view the secret text

×(9,24) to (10,24)