Official NHA Assessment

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

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Line Horse
Greenbackcurrency
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
8 / 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    Gregor Macgregor     4    60.0    1    0.00     4.5   58    86           64    +6
2    Greenbackcurrency    3    57.0    2    2.90     8.0   76    76           76    +0
3    Big Guy              3    60.0    3    6.00     8.0   63    79           79    +16
4    Nuclear Force        5    57.0    4    7.25     0.0   -     89           89    +89
5    Royal Raphael        3    57.0    5    9.75     8.0   73    73           73    +0
5    Street's Ahead       2    53.5    5    9.75     0.0   57    82           82    +25
7    Us Open              3    57.0    7    16.00    8.0   70    73           73    +3
8    All Black Captain    3    57.0    8    19.00    8.0   -     73           73    +73
9    Big Dreamer          2    57.0    9    19.70    0.0   57    89           89    +32
10   Harcourt             2    55.5    10   20.00    0.0   56    86           86    +30
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Gregor Macgregor 58 63 64 -1 4.5 -
2 Greenbackcurrency Line 76 71 76 -5 8.0
3 Big Guy 63 60 79 -19 8.0 -
4 Nuclear Force - 61 89 -28 0.0 -
5 Royal Raphael 73 54 73 -19 8.0 -
5 Street's Ahead 57 55 82 -27 0.0 -
7 Us Open 70 60 73 -13 8.0 -
8 All Black Captain - 55 73 -18 8.0 -
9 Big Dreamer 57 52 89 -37 0.0 -
10 Harcourt 56 52 86 -34 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