Chess e4 Opening Tutorial Board

A clear, flat number overlooks the chessboard, centered on the canvas. The board is an 8x8 grid, with algebraic coordinates displayed around the edges: letters from a to h at the top and bottom, and numbers from 8 to 1 on the left and right. Using dark charcoal gray as the external background and border, the checkerboard alternates between light beige and soft taupe. Rendered with a clean, high-contrast 2D chess icon, black pieces at the top and white pieces below, presenting a clear vector style, with no wood grain texture, no real light or shadow, and no unnecessary interface elements. Showcase 1. Exact positions after opening e4 and e5: Black large pieces are located on rook a8, knight on b8, bishop on c8, behind d8, king on e8, bishop on f8, knight on g8, rook on h8; Black pawns are located at a7, b7, c7, d7, f7, g7, h7, and e5; White pawns are located at a2, b2, c2, d2, f2, g2, h2, and e4; The white big piece is located at rook a1, horse b1, bishop c1, queen on d1, joker on e1, bishop on f1, knight on horse at g1, and rook on h1. The rest of the squares are left blank. Maintain absolute symmetry in composition, have educational significance, and be easy to recognize, just like a digital chess chart used to illustrate the opening move.