Official NHA Assessment

Race 9: NEXT TURFFONTEIN RACEMEETING SATURDAY 28 MARCH PINNACLE STAKES (Open)

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Line Horse
Karate Kid
Reference for assessment
Exact Matches
2 / 11
Calculated = Official
Close Matches
6 / 11
Within 2 points
Significant Diffs
3 / 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    Ziyasha              2    58.0    1    0.00     2.5   117   117          117   +0
2    Karate Kid           3    52.0    2    1.40     3.5   103   103          103   +0
3    Gimmethegoodlife     3    48.5    3    1.60     3.5   97    96           96    -1
4    William Robertson    6    62.0    4    2.10     0.0   124   130          130   +6
5    Anfields Rocket      5    52.5    5    2.15     0.0   106   111          111   +5
6    Rodeo Drive          2    54.0    6    3.05     2.5   113   109          109   -4
7    Rafa Bay             2    50.5    7    3.75     2.5   97    102          102   +5
8    Minogue              4    54.0    8    6.50     4.0   112   106          106   -6
9    The Africa House     4    48.0    9    12.00    4.0   94    94           94    +0
10   Busstopinhounslow    3    56.0    10   14.00    3.5   110   111          111   +1
11   Chasing Happiness    3    54.5    11   16.50    3.5   110   108          108   -2
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Ziyasha 117 118 117 +1 2.5 -
2 Karate Kid Line 103 103 103 ✓ Match 3.5
3 Gimmethegoodlife 97 96 96 ✓ Match 3.5 -
4 William Robertson 124 124 130 -6 0.0 -
5 Anfields Rocket 106 106 111 -5 0.0 -
6 Rodeo Drive 113 113 109 +4 2.5 -
7 Rafa Bay 97 96 102 -6 2.5 -
8 Minogue 112 112 106 +6 4.0 -
9 The Africa House 94 93 94 -1 4.0 -
10 Busstopinhounslow 110 110 111 -1 3.5 -
11 Chasing Happiness 110 110 108 +2 3.5 -
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