SudoKanard

 Yajilin     Blacken some white cells and then draw a single closed loop (without intersections or crossings) through all remaining white cells. Blackened cells cannot share an edge with each other. Some cells are outlined and in gray and cannot be part of the loop. Numbered arrows in such cells indicate the total number of blackened cells that exist in that direction in the grid.   Penpa link:  https://tinyurl.com/2k2vnh4d

 Heyawake     Shade some cells in the grid according to the following rules: - regions with a number should contain as many shaded cells; - two black cells cannot be adjacent horizontally or vertically; - a straight (horizontal or vertical) run of consecutive unshaded cells cannot span across more than 2 regions (it cannot cross more than one bold frontier); - all unshaded cells should be connected in a single group.   Solve on Penpa:  https://tinyurl.com/2glvkenh