Official NHA Assessment

Race 7: BAKER MCVEIGH DIANA STAKES (Grade 3) (Fillies and Mares)

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Line Horse
Princess Izzy
Reference for assessment
Exact Matches
1 / 10
Calculated = Official
Close Matches
2 / 10
Within 2 points
Significant Diffs
3 / 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    Gimmie's Countess    3    51.5    1    0.00     8.0   105   71           71    -34
2    Summer Lily          2    55.5    2    1.00     0.0   92    99           99    +7
3    Princess Izzy        2    56.0    3    2.25     0.0   99    99           99    +0
4    Gold Poker Game      2    60.0    4    2.30     0.0   107   106          106   -1
5    My Flower Fate       3    55.5    5    2.80     8.0   87    81           81    -6
6    Rainbow Lorikeet     2    55.5    6    3.55     0.0   101   96           96    -5
7    Royals               2    57.0    7    5.05     0.0   103   98           98    -5
8    Unconquerable Lady   2    55.5    8    6.30     0.0   96    95           95    -1
9    Dixieland Band       2    51.5    9    7.55     0.0   100   87           90    -10
10   Miss World           3    51.5    10   10.55    8.0   97    71           87    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Gimmie's Countess 105 107 71 +36 8.0 -
2 Summer Lily 92 99 99 ✓ Match 0.0 -
3 Princess Izzy Line 99 104 99 +5 0.0
4 Gold Poker Game 107 105 106 -1 0.0 -
5 My Flower Fate 87 86 81 +5 8.0 -
6 Rainbow Lorikeet 101 115 96 +19 0.0 -
7 Royals 103 94 98 -4 0.0 -
8 Unconquerable Lady 96 90 95 -5 0.0 -
9 Dixieland Band 100 72 90 -18 0.0 -
10 Miss World 97 91 87 +4 8.0 -
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