Official NHA Assessment

Race 1: SF LOGISTICS PINE SHAVINGS 072 4474 198 MAIDEN PLATE (F & M) (For Maiden Fillies & Mares)

Back to Race
Line Horse
Head Girl
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
6 / 10
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Avernian Goddess     3    57.0    1    0.00     1.5   -     51           6     +6
2    Head Girl            5    60.0    2    2.10     0.0   60    60           60    +0
3    Like A Butterfly     3    60.0    3    2.15     1.5   68    57           58    -10
4    Tothestarsandback    2    60.0    4    6.25     0.5   57    59           59    +2
5    Feather Dancer       2    60.0    5    7.30     0.5   65    59           59    -6
6    Fantastic World      2    57.0    6    14.40    0.5   -     53           53    +53
7    Guard My Fate        3    57.0    7    22.10    1.5   -     51           51    +51
8    Rea's Palace         2    57.0    8    23.50    0.5   -     53           53    +53
9    Princess Rhaenyra    2    57.0    9    24.20    0.5   -     53           53    +53
99   Sheezarocket         2    55.5    99   0.00     0.5   -     50           50    +0
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Avernian Goddess - 91 6 +85 1.5 -
2 Head Girl Line 60 62 60 +2 0.0
3 Like A Butterfly 68 54 58 -4 1.5 -
4 Tothestarsandback 57 52 59 -7 0.5 -
5 Feather Dancer 65 50 59 -9 0.5 -
6 Fantastic World - 48 53 -5 0.5 -
7 Guard My Fate - 48 51 -3 1.5 -
8 Rea's Palace - 36 53 -17 0.5 -
9 Princess Rhaenyra - 22 53 -31 0.5 -
99 Sheezarocket - 62 50 +12 0.5 -
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