Official NHA Assessment

Race 1: #THISISRACING WELCOMES YOU MAIDEN PLATE (For all Maidens)

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Line Horse
Covert Operator
Reference for assessment
Exact Matches
1 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
7 / 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    Tanganga             2    57.5    1    0.00     5.5   74    48           48    -26
2    Tre Amici            2    59.0    2    0.90     5.5   79    51           69    -10
3    Covert Operator      6    60.0    3    1.15     0.0   64    64           64    +0
4    Siberian Steel       3    59.0    4    2.50     8.5   -     45           45    +45
5    Fiddleronthecliffs   3    59.0    5    4.45     8.5   -     45           45    +45
6    Mayor Of Merrivale   2    59.0    6    4.65     5.5   -     51           51    +51
7    Joyous Jubilee (AUS  2    59.0    7    7.40     5.5   -     51           51    +51
8    Above The World      2    56.5    8    10.40    5.5   73    46           63    -10
9    Stalker              3    55.0    9    12.30    8.5   -     37           37    +37
99   One Step At A Time   3    59.0    99   0.00     8.5   -     45           45    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Tanganga 74 66 48 +18 5.5 -
2 Tre Amici 79 64 69 -5 5.5 -
3 Covert Operator Line 64 77 64 +13 0.0
4 Siberian Steel - 80 45 +35 8.5 -
5 Fiddleronthecliffs - 76 45 +31 8.5 -
6 Mayor Of Merrivale - 59 51 +8 5.5 -
7 Joyous Jubilee (AUS) - 61 51 +10 5.5 -
8 Above The World 73 63 63 ✓ Match 5.5 -
9 Stalker - 41 37 +4 8.5 -
99 One Step At A Time - - 45 -45 8.5 -
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