Multi-piece solid golf ball

A multi-piece solid golf ball comprising a core of one or more layer, one or more envelope layer, a single intermediate layer and a single-layer cover, wherein the core is formed of a rubber composition, the envelope layer, the intermediate layer and the cover are each formed of a resin composition, and the core has an initial velocity, the envelope layer-encased sphere obtained by encasing the core with the envelope layer has an initial velocity, the intermediate layer-encased sphere obtained by encasing the envelope layer encased sphere with the intermediate layer has an initial velocity and the ball obtained by encasing the intermediate layer-encased sphere with the cover has an initial velocity which together satisfy the following three conditions:

• (initial velocity of ball)<(initial velocity of intermediate layer-encased sphere),
• (initial velocity of intermediate layer-encased sphere)−(initial velocity of envelope layer-encased sphere)≤0.60 m/s, and
• 0.50≤(initial velocity of envelope layer-encased sphere)−(initial velocity of core)≤1.08 m/s, and
• wherein the core has a hardness profile in which, letting Cc be the Shore C hardness at a center of the core, Cs be the Shore C hardness at a surface of the core, Cm be the Shore C hardness at a midpoint M between the core center and the core surface, Cm−2, Cm−4 and Cm−6 be the respective Shore C hardnesses at positions 2 mm, 4 mm and 6 mm inward from the midpoint M and Cm+2, Cm+4 and Cm+6 be the respective Shore C hardnesses at positions 2 mm, 4 mm and 6 mm outward from the midpoint M, and defining surface areas A to F as follows
• surface area A:
• ½×2× (Cm−4−Cm−6)
• surface area B:
• ½×2× (Cm−2−Cm−4)
• surface area C:
• ½×2× (Cm−Cm−2)
• surface area D:
• ½×2× (Cm+2−Cm)
• surface area E:
• ½×2× (Cm+4−Cm+2)
• surface area F:
• ½×2× (Cm+6−Cm+4),
• the core satisfies the condition:
• (surface area E+surface area F)−(surface area A+surface area B)≥1.0.