Brian Hinkle's Prize Problem has remained unsolved and now Brian has increased the prize to $100 as of 00:01 HST, August 1, 2021. The final deadline for the receipt of a correct solution is 00:01 HST, August 27, 2021. There will be no further prize increases and the solution and name of the winner (if any) will be published in The Checker Maven on August 28.
The problem has resisted the efforts of top players and strong computer programs. Brian has even asked to have a computer search done to an unprecedented level of a trillion positions.
But it can be solved. Will you be the one to do it?
Terms and conditions apply; see the Prize Problem article, linked above, for full details. Void where prohibited by law.