Solving time 6:28 I’m pretty sure this grid uses the smallest possible number of added black squares in an “odd rows and columns” lattice. There are just 8 of them. This puzzle used fairly original … Read more “23,512 – a classic grid”
Solving time 6:28 I’m pretty sure this grid uses the smallest possible number of added black squares in an “odd rows and columns” lattice. There are just 8 of them. This puzzle used fairly original … Read more “23,512 – a classic grid”