Official NHA Assessment

Race 7: BOOK FOR GUINEAS DAY 1 FEBRUARY FM 94 DIVIDED HANDICAP (F & M) (For Fillies and Mares)

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Line Horse
Kia Kaha
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
2 / 11
Within 2 points
Significant Diffs
8 / 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    Foreverinmydreams    2    56.0    1    0.00     3.5   86    96           86    +0
2    Kia Kaha             3    52.0    2    2.60     5.0   85    85           85    +0
3    Chrome Tourmaline    4    61.0    3    2.65     6.0   96    101          101   +5
4    Cosmic Queen         3    54.5    4    3.85     5.0   90    90           90    +0
5    Kindred Heart        3    54.0    5    4.25     5.0   89    89           89    +0
6    Lady Of Memphis      3    52.0    6    5.00     5.0   85    85           85    +0
7    Night Vigil          4    57.5    7    5.20     6.0   89    94           94    +5
8    We Will Rock You     3    52.5    8    5.60     5.0   86    86           86    +0
9    Global Thunder       4    53.0    9    7.80     6.0   80    85           85    +5
10   Mist In Scotland     2    55.5    10   7.85     3.5   84    95           95    +11
99   Virginia Beach       2    57.0    99   0.00     3.5   -     98           98    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Foreverinmydreams 86 92 86 +6 3.5 -
2 Kia Kaha Line 85 71 85 -14 5.0
3 Chrome Tourmaline 96 107 101 +6 6.0 -
4 Cosmic Queen 90 97 90 +7 5.0 -
5 Kindred Heart 89 88 89 -1 5.0 -
6 Lady Of Memphis 85 72 85 -13 5.0 -
7 Night Vigil 89 91 94 -3 6.0 -
8 We Will Rock You 86 77 86 -9 5.0 -
9 Global Thunder 80 83 85 -2 6.0 -
10 Mist In Scotland 84 77 95 -18 3.5 -
99 Virginia Beach - 82 98 -16 3.5 -
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