Golf ball

A golf ball comprising a single-layer core, a cover and at least one intermediate layer interposed between the core and the cover, wherein the sphere obtained by encasing the core with the intermediate layer (intermediate layer-encased sphere) and the ball have a surface hardness relationship therebetween which satisfies the condition:

• (surface hardness of intermediate layer-encased sphere)>(surface hardness of ball);
• the core has a diameter of from 35.5 to 39.5 mm and a corresponding radius;
• and the core has a hardness profile which satisfies the following conditions:
• (H75−H50)>(H25−H0)>(H100−H87.5)>(H50−H25)
• 23.0≥(H87.5−H0)≥17.0
• absolute value of (H87.5−H0)/(H50−H0)≥3.0,
• where H100 is the Shore C hardness at a surface of the core, H87.5 is the Shore C hardness at a position 87.5% of the core radius outward from a center of the core, H75 is the Shore C hardness at a position 75% of the core radius outward from the core center, H62.5 is the Shore C hardness at a position 62.5% of the core radius outward from the core center, H50 is the Shore C hardness at a position 50% of the core radius outward from the core center, H37.5 is the Shore C hardness at a position 37.5% of the core radius outward from the core center, H25 is the Shore C hardness at a position 25% of the core radius outward from the core center, H12.5 is the Shore C hardness at a position 12.5% of the core radius outward from the core center and H0 is the Shore C hardness at the core center.