This is a shaka/shawaka puzzle. Place black triangles in some white cells within the grid – shaped by dividing a cell diagonally and portray one aspect black – so that every remaining white space kinds the form of a tromino (a chunk made up of three squares in both an I or L form). The white space could be any dimension, so long as its proportions precisely match both an I or L tromino. Numbers in black cells point out what number of triangles in whole are within the cells orthogonally adjoining to that quantity cell.

TL;DR Shakashaka however the purpose is forming trominoes as a substitute of rectangles.

Penpa+ hyperlink. Select Composite → Paint → Shakashaka for the proper enter mode.