Official NHA Assessment

Race 5: WORLD SPORTS BETTING SPINAWINA OPEN MAIDEN (For all Maidens)

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Line Horse
Marshall Field
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
2 / 11
Within 2 points
Significant Diffs
6 / 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    Saint Silas          2    57.5    1    0.00     0.0   67    70           70    +3
2    Marshall Field       3    61.0    2    0.20     1.5   74    74           74    +0
3    Lord Fyfield         2    56.0    3    2.70     0.0   -     69           69    +69
4    Run Rudolph Run      3    57.5    4    3.00     1.5   64    69           69    +5
5    Lockheedlightning    2    56.0    5    4.75     0.0   64    67           67    +3
6    Destiny's Angel      3    53.0    6    5.15     1.5   50    58           58    +8
7    Naushon              3    57.0    7    7.15     1.5   63    66           66    +3
8    Hawk Circle          2    60.5    8    14.65    0.0   73    76           76    +3
9    Twice Told           3    53.5    9    21.65    1.5   58    59           59    +1
10   Marree Man           3    52.5    10   27.15    1.5   45    57           57    +12
11   Jacksway             5    53.0    11   41.15    0.0   33    61           61    +28
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Saint Silas 67 65 70 -5 0.0 -
2 Marshall Field Line 74 77 74 +3 1.5
3 Lord Fyfield - 65 69 -4 0.0 -
4 Run Rudolph Run 64 57 69 -12 1.5 -
5 Lockheedlightning 64 66 67 -1 0.0 -
6 Destiny's Angel 50 92 58 +34 1.5 -
7 Naushon 63 68 66 +2 1.5 -
8 Hawk Circle 73 68 76 -8 0.0 -
9 Twice Told 58 51 59 -8 1.5 -
10 Marree Man 45 38 57 -19 1.5 -
11 Jacksway 33 33 61 -28 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