Official NHA Assessment

Race 6: WORLD SPORTS BETTING SPINAWINA MAIDEN PLATE (For all Maidens)

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Line Horse
Naushon
Reference for assessment
Exact Matches
1 / 11
Calculated = Official
Close Matches
3 / 11
Within 2 points
Significant Diffs
7 / 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    Spirit's Unite       2    56.0    1    0.00     0.0   -     53           6     +6
2    Naushon              3    60.0    2    0.30     1.5   63    63           63    +0
3    Approach Shot        2    56.0    3    8.80     0.0   -     53           53    +53
4    State Of Shock       3    60.0    4    11.05    1.5   61    58           58    -3
5    Big Fella            2    56.5    5    14.55    0.0   -     54           54    +54
6    Marree Man           3    60.0    6    16.80    1.5   48    58           58    +10
7    Red William          5    60.0    7    29.05    0.0   75    61           65    -10
8    Otis The Brave       3    60.0    8    31.30    1.5   67    58           58    -9
9    Longpath             2    60.0    9    99.99    0.0   -     61           61    +61
10   Rainbow Colours      3    60.0    10   99.99    1.5   74    58           64    -10
11   Logistical           3    60.0    11   99.99    1.5   68    58           58    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Spirit's Unite - 70 6 +64 0.0 -
2 Naushon Line 63 68 63 +5 1.5
3 Approach Shot - 70 53 +17 0.0 -
4 State Of Shock 61 58 58 ✓ Match 1.5 -
5 Big Fella - 70 54 +16 0.0 -
6 Marree Man 48 38 58 -20 1.5 -
7 Red William 75 83 65 +18 0.0 -
8 Otis The Brave 67 59 58 +1 1.5 -
9 Longpath - 44 61 -17 0.0 -
10 Rainbow Colours 74 63 64 -1 1.5 -
11 Logistical 68 68 58 +10 1.5 -
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