for (let j=startY; j>=0 && j<sizeY; j+=inc)
{
// NOTE: 'board' to distinguish from coords
- boardDiv += "<div class='board lichess " +
+ boardDiv += "<div class='board board" + sizeY + " " +
((i+j)%2==0 ? "light-square-diag" : "dark-square-diag") + "'>";
if (markArray.length>0 && markArray[i][j])
boardDiv += "<img src='/images/mark.svg' class='markSquare'/>";