Official NHA Assessment

Race 2: OFF THE RAILS MAIDEN PLATE (F & M) (For Maiden Fillies & Mares)

Back to Race
Line Horse
Stealth Attack
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
0 / 9
Within 2 points
Significant Diffs
7 / 9
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Mission Rocks        3    60.0    1    0.00     3.0   65    58           58    -7
2    Stealth Attack       2    60.0    2    0.80     0.0   68    68           68    +0
3    Taste Maker          3    60.0    3    0.85     3.0   58    62           62    +4
4    I'm Devine           4    58.5    4    6.95     2.0   -     57           57    +57
5    Telio                2    60.0    5    7.00     0.0   69    64           64    -5
6    Queen Jackson        3    60.0    6    8.10     3.0   -     58           58    +58
7    Samsai               3    60.0    7    8.35     3.0   59    58           58    -1
8    Chessade             3    60.0    8    10.65    3.0   35    58           58    +23
9    Tiverton             4    57.5    9    19.25    2.0   -     55           55    +55
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Mission Rocks 65 74 58 +16 3.0 -
2 Stealth Attack Line 68 52 68 -16 0.0
3 Taste Maker 58 54 62 -8 3.0 -
4 I'm Devine - 60 57 +3 2.0 -
5 Telio 69 54 64 -10 0.0 -
6 Queen Jackson - 50 58 -8 3.0 -
7 Samsai 59 53 58 -5 3.0 -
8 Chessade 35 36 58 -22 3.0 -
9 Tiverton - 20 55 -35 2.0 -
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