Official NHA Assessment

Race 7: GORDON STERLEY, HENNIE VAN WYK, HAROLD WHITEHEAD MR 78 HANDICAP (Open)

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Line Horse
Let There Be Light
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
4 / 10
Within 2 points
Significant Diffs
5 / 10
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    Indus Knight         3    51.5    1    0.00     2.5   69    58           69    +0
2    Calibre Crest        3    57.5    2    3.25     2.5   78    72           72    -6
3    Let There Be Light   4    60.0    3    5.45     1.0   78    78           78    +0
4    Dawn Of A New Era    4    58.5    4    6.75     1.0   75    75           75    +0
5    Sergei               4    53.5    5    8.50     1.0   65    65           65    +0
6    Leshawes             3    55.5    6    9.20     2.5   74    66           66    -8
7    In Cahoots           6    56.0    7    9.60     0.0   70    72           72    +2
8    Romeo's Magic        7    57.5    8    10.60    0.0   73    75           75    +2
9    King Arthur          3    55.0    9    13.10    2.5   76    65           66    -10
10   Castle Corner        4    60.0    10   14.00    1.0   78    78           78    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Indus Knight 69 70 69 +1 2.5 -
2 Calibre Crest 78 74 72 +2 2.5 -
3 Let There Be Light Line 78 59 78 -19 1.0
4 Dawn Of A New Era 75 78 75 +3 1.0 -
5 Sergei 65 55 65 -10 1.0 -
6 Leshawes 74 73 66 +7 2.5 -
7 In Cahoots 70 54 72 -18 0.0 -
8 Romeo's Magic 73 73 75 -2 0.0 -
9 King Arthur 76 68 66 +2 2.5 -
10 Castle Corner 78 72 78 -6 1.0 -
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