As far as I know, each game provider uses a different number of lines with symbols in their slots. I have tried both large grids, like the one in Big Sweet Bonanza, and more standard grids, like the one in 21 Thor Lightning Ways, which is 5x5. At first, I thought that the larger the grid, the more often symbols with multipliers and other bonuses would fall. However, these factors are independent of each other, and I was luckier more often than usual on smaller grids. My virtual deposit increased with each game session. What size grids do you prefer in slots? Is there perhaps an ideal winning algorithm related to this?