Shader Transparent

Hello I want to do a shader to see the player when he is behind a object.For this objective I use a extra shader pass:

Code (CSharp):

1.     Pass {
2.  
3.             Tags
4.             {
5.                 "RenderType" = "Transparent"  "Queue" = "Transparent"
6.             }
7.              Blend One OneMinusSrcAlpha
8.             ZWrite On
9.             ZTest GEqual
10.             CGPROGRAM
11.             #pragma vertex vert
12.             #pragma fragment frag
13.  
14.             #include "UnityCG.cginc"
15.  
16.             struct appdata
17.             {
18.                 float4 vertex : POSITION;
19.                 float2 uv : TEXCOORD0;
20.             };
21.  
22.             struct v2f
23.             {
24.                 float2 uv : TEXCOORD0;
25.  
26.                 float4 vertex : SV_POSITION;
27.             };
28.  
29.             sampler2D _MainTex;
30.             float4 _MainTex_ST;
31.             float4 _PlayerColor;
32.             v2f vert(appdata v)
33.             {
34.                 v2f o;
35.                 o.vertex = UnityObjectToClipPos(v.vertex);
36.                 o.uv = TRANSFORM_TEX(v.uv, _MainTex);
37.  
38.                 return o;
39.             }
40.  
41.             fixed4 frag(v2f i) : SV_Target
42.             {
43.                 return _PlayerColor;
44.             }
45.             ENDCG
46.             }

Thats works great but I have a problem when I use alpha, I can see faces of another objects in my own player overlapping themselves(typical alfa ordering problem).How I can draw this pass like opaque figur and after apply alfa to this figur? or how I solve this problem?

Thanks!