Abstract: A golf ball includes a core and a cover positioned outside the core. An n-layer (n is a natural number) partial mid layer is provided between the core and the cover. An area of the core in a region where the cover is laminated thereon is not less than 5.0% and not greater than 95.0% of a surface area of a phantom sphere having a radius equal to an average value of a distance from a central point of the core to a surface of the core. In an outer surface of the golf ball, a color difference ?E1 based on a CIELAB color system between a region C where the cover is directly laminated on the core and a region M where the cover is laminated on the partial mid layer is not less than 20.0.

Abstract: A golf ball includes a core, a mid layer, and a cover. An amount of compressive deformation C3 of the golf ball can be not less than 2.80 mm. The golf ball can satisfy the following mathematical formulas (1) and (2): C1>(124.8?Hs)/11.5??(1) C2?C1?(?1/6*C1+(68?H2)/20+(5?Hd)/100)*T2??(2), where C1 is an amount of compressive deformation (mm) of the core, C2 is an amount of compressive deformation (mm) of a sphere including the core and the mid layer, Hd is Hs?Ho, Ho is a hardness (Shore C) of a center the core, Hs is a hardness (Shore C) of a surface of the core, H2 is a hardness (Shore D) of the mid layer, and T2 is a thickness (mm) of the mid layer.

Abstract: A golf ball can include a core, a mid layer, and a cover. The golf ball can satisfy the following mathematical formulas (1), (2), and (3): C1?(124.8?Hs)/11.5??(1) C2?C1?(?1/6*C1+(68?H2)/20+(5?Hd)/100)*T2?? (2) 10?H2*T2?H3*T3??(3), where C1 is an amount of compressive deformation (mm) of the core, C2 is an amount of compressive deformation (mm) of a sphere including the core and the mid layer, Hd is Hs?Ho, Ho is a hardness (Shore C) of a center the core, Hs is a hardness (Shore C) of a surface of the core, H2 is a hardness (Shore D) of the mid layer, H3 is a hardness (Shore D) of the cover, T2 is a thickness (mm) of the mid layer, and T3 is a thickness (mm) of the cover.

Abstract: A golf ball according to an aspect of the present invention is a golf ball having a large number of dimples, a surface of the golf ball is covered with a plurality of virtual flat surfaces each having a triangular shape, one or more dimples are arranged so as to correspond to each of the virtual flat surfaces, and an edge of each dimple is formed in a linear shape. Each dimple may have a triangular pyramid shape or a triangular frustum shape.

Abstract: A golf ball includes a core and a cover. An n-layer (n is a natural number) partial mid layer is provided between the core and the cover. An area of the core in a region where the cover is laminated thereon is not less than 5.0% and not greater than 95.0% of a surface area of a phantom sphere. A hitting feel index Cx calculated using a thickness T0 (mm) of the cover laminated on the partial mid layer, a Shore D hardness Ck of a kth layer (k is an integer from 1 to n) from the core side, a thickness Tk (mm) of the kth layer, a Shore D hardness C of the cover, and an average thickness T (mm) of the cover, is less than 66.0. An absolute value |Cx?C| is not less than 1.0 and not greater than 5.0.

Abstract: A golf ball can include a core, a mid layer, and a cover. The golf ball can satisfy the following mathematical formulas (1), (2), and (3): C1?(124.8?Hs)/11.5??(1) C2?C1?(??*C1+(68?H2)/20+(5?Hd)/100)*T2??(2) 10?H2*T2?H3*T3??(3), where C1 is an amount of compressive deformation (mm) of the core, C2 is an amount of compressive deformation (mm) of a sphere including the core and the mid layer, Hd is Hs?Ho, Ho is a hardness (Shore C) of a center the core, Hs is a hardness (Shore C) of a surface of the core, H2 is a hardness (Shore D) of the mid layer, H3 is a hardness (Shore D) of the cover, T2 is a thickness (mm) of the mid layer, and T3 is a thickness (mm) of the cover.

Abstract: A golf ball includes a core, a mid layer, and a cover. An amount of compressive deformation C3 of the golf ball can be not less than 2.80 mm. The golf ball can satisfy the following mathematical formulas (1) and (2): C1>(124.8?Hs)/11.5 ??(1) C2?C1?(?1/6*C1+(68?H2)/20+(5?Hd)/ 100)*T2 ??(2), where C1 is an amount of compressive deformation (mm) of the core, C2 is an amount of compressive deformation (mm) of a sphere including the core and the mid layer, Hd is Hs?Ho, Ho is a hardness (Shore C) of a center the core, Hs is a hardness (Shore C) of a surface of the core, H2 is a hardness (Shore D) of the mid layer, and T2 is a thickness (mm) of the mid layer.

Abstract: A golf ball 2 includes a core 4, an inner cover 6 positioned outside the core 4, and an outer cover 8 positioned outside the inner cover 6. The core 4 has a capsule 14, a plurality of separators 16, an electronic unit 18, and a plurality of fillings 20. The capsule 14 has a melting point of not lower than 100° C. A ratio P1 of a volume Vr of the capsule 14 to a volume Vc of the core 4 is not less than 25% and not greater than 75%. The electronic unit 18 is housed in the capsule 14. The electronic unit 18 detects behavior of the golf ball 2.

Abstract: A golf ball has a plurality of dimples 12 and a land 14 on a surface thereof. The golf ball further has a large number of minute projections 18 formed on surfaces of the dimples 12 and the land 14. The surface of the golf ball has an arithmetic average height Sa of not less than 0.5 ?m and not greater than 30 ?m. An average value Hav of heights H of the minute projections 18 is not less than 0.5 ?m and not greater than 50 ?m. A ratio Pp of a sum of areas of all the minute projections 18 to a surface area of a phantom sphere of the golf ball is not less than 7%. An average value Dav of diameters D of the minute projections 18 is not less than 5 ?m and not greater than 50 ?m.

Abstract: A golf ball includes a core and a cover positioned outside the core. An n-layer (n is a natural number) partial mid layer is provided between the core and the cover. An area of the core in a region where the cover is laminated thereon is not less than 5.0% and not greater than 95.0% of a surface area of a phantom sphere having a radius equal to an average value of a distance from a central point of the core to a surface of the core. In an outer surface of the golf ball, a color difference ?E1 based on a CIELAB color system between a region C where the cover is directly laminated on the core and a region M where the cover is laminated on the partial mid layer is not less than 20.0.

Abstract: A golf ball includes a core and a cover. An n-layer (n is a natural number) partial mid layer is provided between the core and the cover. An area of the core in a region where the cover is laminated thereon is not less than 5.0% and not greater than 95.0% of a surface area of a phantom sphere. A hitting feel index Cx calculated using a thickness T0 (mm) of the cover laminated on the partial mid layer, a Shore D hardness Ck of a kth layer (k is an integer from 1 to n) from the core side, a thickness Tk (mm) of the kth layer, a Shore D hardness C of the cover, and an average thickness T (mm) of the cover, is less than 66.0. An absolute value |Cx?C| is not less than 1.0 and not greater than 5.0.

Abstract: A golf ball has a plurality of minute projections 20 on a surface thereof. An average value Hav of heights H of these minute projections 20 is not less than 0.5 ?m and not greater than 50 ?m. The surface of the golf ball has one or more first zones and one or more second zones. An average value Hav1 of the heights H of the minute projections 20 on these first zones is higher than an average value Hav2 of the heights H of the minute projections 20 on these second zones. Preferably, the average value Hav1 and the average value Hav2 satisfy the following mathematical formula.

Abstract: A golf ball has a plurality of dimples 12 and a land 14 on a surface thereof. The golf ball further has a large number of minute projections 18 formed on surfaces of the dimples 12 and the land 14. The surface of the golf ball has an arithmetic average height Sa of not less than 0.5 ?m and not greater than 30 ?m. An average value Hav of heights H of the minute projections 18 is not less than 0.5 ?m and not greater than 50 ?m. A ratio Pp of a sum of areas of all the minute projections 18 to a surface area of a phantom sphere of the golf ball is not less than 7%. An average value Dav of diameters D of the minute projections 18 is not less than 5 ?m and not greater than 50 ?m.

Abstract: A golf ball has a large number of exposed portions 22 on a surface thereof. An average value Hav of heights H of these exposed portions 22 is not less than 0.5 ?m and not greater than 50 ?m. The surface of the golf ball has one or more first zones and one or more second zones. An average value Hav1 of the heights H of the exposed portions 22 on these first zones is higher than an average value Hav2 of the heights H of the exposed portions 22 on these second zones. Preferably, the average value Hav1 and the average value Hav2 satisfy the following mathematical formula.

Abstract: A golf ball has a plurality of dimples 12 and a land 14 on a surface thereof. The golf ball further has a large number of minute projections 18 formed on surfaces of the dimples 12 and the land 14. The minute projections 18 are exposed on the surface of the golf ball. The surface of the golf ball has an arithmetic average height Sa of not less than 0.5 ?m and not greater than 30 ?m. The surface of the golf ball has a maximum height Sz of not less than 5 ?m and not greater than 200 ?m.

Abstract: A golf ball has a plurality of dimples 12 and a land 14 on a surface thereof. The golf ball further has a large number of minute projections 18 formed on surfaces of the dimples 12 and the land 14. The surface of the golf ball has an arithmetic average height Sa of not less than 0.5 ?m and not greater than 30 ?m. An average value Hav of heights H of the minute projections 18 is not less than 0.5 ?m and not greater than 50 ?m. A ratio Pp of a sum of areas of all the minute projections 18 to a surface area of a phantom sphere of the golf ball is not less than 7%. An average value Dav of diameters D of the minute projections 18 is not less than 5 ?m and not greater than 50 ?m.

Abstract: A golf ball 2 includes a core 4 and a cover 6 positioned outside the core 4. The cover 6 is molded in a mold having support pins by injection molding. A ratio (K/S) of a surface hardness K of the core 4 to an amount of compressive deformation S of the core 4 satisfies the following mathematical formula. 13.0?K/S?24.0 The cover 6 has a hardness H of not greater than 62. A product (?*V) of a latitude ? of each support pin and a volume V of the cover 6 is not less than 300.

Abstract: A golf ball has a large number of exposed portions 22 on a surface thereof. An average value Hav of heights H of these exposed portions 22 is not less than 0.5 ?m and not greater than 50 ?m. The surface of the golf ball has one or more first zones and one or more second zones. An average value Hav1 of the heights H of the exposed portions 22 on these first zones is higher than an average value Hav2 of the heights H of the exposed portions 22 on these second zones. Preferably, the average value Hav1 and the average value Hav2 satisfy the following mathematical formula.

Abstract: A golf ball has a plurality of minute projections 20 on a surface thereof. An average value Hav of heights H of these minute projections 20 is not less than 0.5 ?m and not greater than 50 ?m. The surface of the golf ball has one or more first zones and one or more second zones. An average value Hav1 of the heights H of the minute projections 20 on these first zones is higher than an average value Hav2 of the heights H of the minute projections 20 on these second zones. Preferably, the average value Hav1 and the average value Hav2 satisfy the following mathematical formula.

Abstract: A golf ball according to an aspect of the present invention is a golf ball having a large number of dimples, a surface of the golf ball is covered with a plurality of virtual flat surfaces each having a triangular shape, one or more dimples are arranged so as to correspond to each of the virtual flat surfaces, and an edge of each dimple is formed in a linear shape. Each dimple may have a triangular pyramid shape or a triangular frustum shape.