Official NHA Assessment

Race 6: EAST COAST RADIO TIBOUCHINA STAKES (Grade 2) (Fillies and Mares at Weight For Age + Penalties)

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Line Horse
Humdinger
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
8 / 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    Double Grand Slam    2    57.0    1    0.00     0.0   118   108          108   -10
2    Humdinger            3    60.0    2    1.20     1.0   116   116          116   +0
3    Bavarian Beauty      2    60.0    3    2.60     0.0   113   116          116   +3
4    Gimme A Shot         2    58.5    4    3.50     0.0   106   112          112   +6
5    Happy Chance         2    58.5    5    5.50     0.0   113   111          111   -2
6    Ripple Effect        2    57.0    6    9.00     0.0   106   108          108   +2
7    Morgan La Fay        2    58.5    7    9.25     0.0   98    111          111   +13
8    Sashay Away          3    58.5    8    10.25    1.0   90    109          109   +19
99   Just Be Lekker       4    57.0    99   0.00     0.5   -     107          107   +0
99   Celtic Rumours       5    58.5    99   0.00     0.0   -     111          111   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Double Grand Slam 118 122 108 +14 0.0 -
2 Humdinger Line 116 119 116 +3 1.0
3 Bavarian Beauty 113 109 116 -7 0.0 -
4 Gimme A Shot 106 110 112 -2 0.0 -
5 Happy Chance 113 118 111 +7 0.0 -
6 Ripple Effect 106 102 108 -6 0.0 -
7 Morgan La Fay 98 98 111 -13 0.0 -
8 Sashay Away 90 88 109 -21 1.0 -
99 Just Be Lekker - 113 107 +6 0.5 -
99 Celtic Rumours - 104 111 -7 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