Official NHA Assessment

Race 6: OPEN A tabGOLD ACCOUNT - 031 314 1874 PINNACLE STAKES (For all horses)

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Line Horse
Pearl Of Asia
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
3 / 12
Within 2 points
Significant Diffs
7 / 12
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    Back To Black        4    49.5    1    0.00     7.0   89    74           74    -15
2    African Skyline      6    51.5    2    0.60     0.0   88    92           92    +4
3    Pearl Of Asia        5    60.5    3    3.70     0.0   110   110          110   +0
4    Ishnana              7    55.5    4    5.60     0.0   104   100          100   -4
5    Irfaans Boy          3    52.5    5    9.30     6.0   89    82           82    -7
6    Chantyman            7    62.0    6    10.60    0.0   116   113          113   -3
7    Spydas Corner        4    54.0    7    12.00    7.0   93    83           83    -10
8    Winter Flight        4    58.0    8    14.60    7.0   100   91           91    -9
9    Sikhulu              3    52.5    9    20.10    6.0   90    82           82    -8
99   Solid Gold           6    56.5    99   0.00     0.0   -     102          102   +0
99   Pray For Rain        4    58.0    99   0.00     7.0   -     91           91    +0
99   Aqua Bolt            5    58.0    99   0.00     0.0   -     105          105   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Back To Black 89 89 74 +15 7.0 -
2 African Skyline 88 98 92 +6 0.0 -
3 Pearl Of Asia Line 110 107 110 -3 0.0
4 Ishnana 104 83 100 -17 0.0 -
5 Irfaans Boy 89 90 82 +8 6.0 -
6 Chantyman 116 114 113 +1 0.0 -
7 Spydas Corner 93 82 83 -1 7.0 -
8 Winter Flight 100 94 91 +3 7.0 -
9 Sikhulu 90 94 82 +12 6.0 -
99 Solid Gold - 103 102 +1 0.0 -
99 Pray For Rain - 106 91 +15 7.0 -
99 Aqua Bolt - 84 105 -21 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