Official NHA Assessment

Race 6: BET WITH TAB MAIDEN PLATE (For all Maidens)

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Line Horse
Donder Storm
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
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Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
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1    Impetuous            2    58.0    1    0.00     0.0   73    69           69    -4
2    Quantifier           2    58.0    2    0.75     0.0   73    75           75    +2
3    Donder Storm         3    60.0    3    2.00     6.0   66    66           66    +0
4    Western Wall         3    60.0    4    2.75     6.0   59    64           64    +5
5    Space Explorer       2    58.5    5    4.25     0.0   60    72           72    +12
6    Landingonthemoon     2    58.0    6    6.25     0.0   55    69           69    +14
7    Hakas Krakas         3    58.0    7    11.75    6.0   65    57           57    -8
8    Gimme The Best       2    58.0    8    12.15    0.0   72    69           69    -3
9    Yzerfontein          2    58.0    9    31.90    0.0   60    69           69    +9
99   Lead A Merry Dance   3    58.0    99   0.00     6.0   -     57           57    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Impetuous 73 74 69 +5 0.0 -
2 Quantifier 73 74 75 -1 0.0 -
3 Donder Storm Line 66 63 66 -3 6.0
4 Western Wall 59 51 64 -13 6.0 -
5 Space Explorer 60 67 72 -5 0.0 -
6 Landingonthemoon 55 52 69 -17 0.0 -
7 Hakas Krakas 65 65 57 +8 6.0 -
8 Gimme The Best 72 51 69 -18 0.0 -
9 Yzerfontein 60 60 69 -9 0.0 -
99 Lead A Merry Dance - 40 57 -17 6.0 -
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