Official NHA Assessment

Race 7: GREYVILLE CONVENTION CENTRE MR 93 HANDICAP (Open)

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Line Horse
Naval Secret
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
1 / 9
Within 2 points
Significant Diffs
7 / 9
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    Tread Swiftly        4    60.0    1    0.00     1.5   93    96           93    +0
2    Ralph The Rascal     8    55.5    2    0.10     0.0   84    90           90    +6
3    Naval Secret         4    49.5    3    2.30     1.5   77    77           77    +0
4    City By The Sea      4    57.5    4    2.55     1.5   88    93           93    +5
5    Mr Pigalle           4    52.0    5    2.60     1.5   76    82           82    +6
6    Via Salaria          6    57.5    6    3.20     0.0   88    96           96    +8
7    Spring High          4    55.0    7    3.70     1.5   83    87           87    +4
8    Sniper Shot          7    55.5    8    5.70     0.0   92    90           90    -2
99   Desolate Road        6    54.5    99   0.00     0.0   -     88           88    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Tread Swiftly 93 90 93 -3 1.5 -
2 Ralph The Rascal 84 73 90 -17 0.0 -
3 Naval Secret Line 77 91 77 +14 1.5
4 City By The Sea 88 74 93 -19 1.5 -
5 Mr Pigalle 76 68 82 -14 1.5 -
6 Via Salaria 88 82 96 -14 0.0 -
7 Spring High 83 79 87 -8 1.5 -
8 Sniper Shot 92 91 90 +1 0.0 -
99 Desolate Road - 82 88 -6 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