Official NHA Assessment

Race 5: TAB 4RACING APP WORK RIDERS MAIDEN PLATE (For all Maidens)

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Line Horse
Big Five
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
0 / 11
Within 2 points
Significant Diffs
8 / 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    Future Pearl         2    58.0    1    0.00     0.0   75    68           68    -7
2    Rosy Lemon           5    55.5    2    1.75     0.0   72    66           66    -6
3    Broadway             4    60.0    3    2.25     4.5   50    66           66    +16
4    Black Lightning      2    58.0    4    3.25     0.0   63    70           70    +7
5    Big Five             3    60.0    5    3.50     8.0   57    57           57    +0
6    Spring Will Come     3    60.0    6    5.75     8.0   62    56           56    -6
7    Sky Jewel            2    58.0    7    8.00     0.0   40    68           68    +28
8    Sky Runner           3    60.0    8    14.00    8.0   44    56           56    +12
9    Arctic Time          3    58.0    9    14.75    8.0   -     52           52    +52
10   Seven Wonders        3    58.0    10   15.00    8.0   -     52           52    +52
99   Break Point          2    58.0    99   0.00     0.0   -     68           68    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Future Pearl 75 114 68 +46 0.0 -
2 Rosy Lemon 72 72 66 +6 0.0 -
3 Broadway 50 59 66 -7 4.5 -
4 Black Lightning 63 64 70 -6 0.0 -
5 Big Five Line 57 53 57 -4 8.0
6 Spring Will Come 62 72 56 +16 8.0 -
7 Sky Jewel 40 52 68 -16 0.0 -
8 Sky Runner 44 42 56 -14 8.0 -
9 Arctic Time - 49 52 -3 8.0 -
10 Seven Wonders - 48 52 -4 8.0 -
99 Break Point - 74 68 +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