Create a highly realistic image of an elderly man and his 7-year-old grandson playing chess while seated in front of a beach in autumn. The elderly man is slightly hunched over, wearing a checkered blazer over a polo shirt, brown pants, and sandals. His face is wrinkled with a joyful expression. The grandson, dressed in similar clothing and wearing an Italian-style hat, has a serious expression and freckles on his face. They are sitting at a cement chess table set on the sandy beach. The beach is surrounded by autumn foliage, with colorful leaves scattered on the ground and drifting across the sand. The scene should reflect the autumn season with a slightly overcast sky and cool tones in the sand and water. The sunlight is coming from the left side of the image, casting shadows of the chess pieces on the table. The textures of the clothing, the chess pieces, the sand, and the autumn leaves should be depicted with high realism. The ocean should be visible in the background, with gentle waves and a muted color palette characteristic of autumn. The atmosphere should convey a sense of serene fall weather and the unique experience of playing chess by the beach during this season. Highlight the contrast between the man's happy demeanor and the boy's serious focus on the game.