Official NHA Assessment

Race 7: TAB GAUTENG GUINEAS (Grade 2) (For 3 year-olds (1st Leg SA Triple Crown))

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Line Horse
Purple Pitcher
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
0 / 11
Within 2 points
Significant Diffs
11 / 11
More than 5 points
Detailed Assessment
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Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
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1    Sandringham Summit   2    60.0    1    0.00     0.0   121   117          117   -4
2    Hotarubi             4    60.0    2    3.00     2.0   98    115          115   +17
3    William Iron Arm     2    60.0    3    3.20     0.0   94    119          119   +25
4    Purple Pitcher       4    60.0    4    4.20     2.0   114   114          114   +0
5    Gimmeanotherchance   4    60.0    5    5.45     2.0   112   113          113   +1
6    Storm Brasco         4    60.0    6    5.50     2.0   91    113          113   +22
7    Navajo Nation        4    60.0    7    6.00     2.0   93    113          113   +20
8    The Africa House     4    60.0    8    8.00     2.0   103   113          113   +10
9    Mondial              3    60.0    9    8.25     4.0   100   109          109   +9
10   House Of Romanov     2    60.0    10   10.50    0.0   93    117          117   +24
99   Red Bomber           2    60.0    99   0.00     0.0   -     117          117   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Sandringham Summit 121 123 117 +6 0.0 -
2 Hotarubi 98 98 115 -17 2.0 -
3 William Iron Arm 94 111 119 -8 0.0 -
4 Purple Pitcher Line 114 121 114 +7 2.0
5 Gimmeanotherchance 112 96 113 -17 2.0 -
6 Storm Brasco 91 93 113 -20 2.0 -
7 Navajo Nation 93 104 113 -9 2.0 -
8 The Africa House 103 93 113 -20 2.0 -
9 Mondial 100 115 109 +6 4.0 -
10 House Of Romanov 93 81 117 -36 0.0 -
99 Red Bomber - 86 117 -31 0.0 -
Assessment Methodology
Calculation Steps:
  1. Identify Line Horse - consistent performer used as reference
  2. Calculate WFA Allowance based on age, distance, and month
  3. Apply Drag Adjustment for beaten margin
  4. Calculate Actual Weight Performance:
    Weight - Drag - WFA
  5. Compare to Line Horse to determine race rating
  6. Apply special rules (maiden caps, layoff allowance)
Key Formulas:
  • Drag Effect: Varies by distance (see Benchmarks page)
  • 1 length ≈ 1kg at 1 mile (1600m)
  • WFA Scale: Based on Admiral Rous's 1855 table
  • Rating Points: 1kg = 2 rating points