Official NHA Assessment

Race 8: NEXT TURFFONTEIN RACEMEETING THURSDAY 30 OCTOBER MR 74 HANDICAP (Open)

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Line Horse
Spy Story
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
3 / 8
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    Xenophon             3    62.0    1    0.00     8.5   78    78           78    +0
2    Spy Story            3    58.5    2    1.20     8.5   71    71           71    +0
3    His Lordship         3    58.5    3    2.20     8.5   74    71           71    -3
4    Prized Platinum      3    60.0    4    5.50     8.5   74    74           74    +0
5    Pacific              4    52.0    5    7.25     10.0  54    55           55    +1
6    Legendary            2    60.0    6    12.00    5.5   74    80           80    +6
7    Across The Bow       3    52.0    7    17.50    8.5   57    58           58    +1
99   Bumps Last Grind     2    61.5    99   0.00     5.5   -     83           83    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Xenophon 78 83 78 +5 8.5 -
2 Spy Story Line 71 66 71 -5 8.5
3 His Lordship 74 85 71 +14 8.5 -
4 Prized Platinum 74 72 74 -2 8.5 -
5 Pacific 54 50 55 -5 10.0 -
6 Legendary 74 69 80 -11 5.5 -
7 Across The Bow 57 57 58 -1 8.5 -
99 Bumps Last Grind - 75 83 -8 5.5 -
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