Official NHA Assessment

Race 4: INTREPIDITY MAIDEN PLATE (For all Maidens)

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Line Horse
Electric Storm
Reference for assessment
Exact Matches
0 / 13
Calculated = Official
Close Matches
1 / 13
Within 2 points
Significant Diffs
12 / 13
More than 5 points
Detailed Assessment
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Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Madison Valley       4    58.0    1    0.00     3.0   -     84           6     +6
2    Electric Storm       3    56.5    2    3.30     6.0   76    76           76    +0
3    Imaginable           3    56.0    3    4.00     6.0   66    75           75    +9
4    King's Island        4    58.0    4    4.25     3.0   69    85           85    +16
5    Gijima Mfana         6    60.0    5    6.55     0.0   60    94           94    +34
6    Triton               3    60.0    6    7.55     6.0   59    82           82    +23
7    Swift Nicks          3    60.0    7    7.85     6.0   64    82           82    +18
8    Master Owl           3    58.0    8    16.75    6.0   -     78           78    +78
9    Du Cane              2    60.0    9    17.85    0.0   48    94           94    +46
10   Roy's Ruffian        6    60.0    10   20.25    0.0   20    94           94    +74
99   Mayor Of Merrivale   2    60.0    99   0.00     0.0   -     94           94    +0
99   Off Limits           3    54.5    99   0.00     6.0   -     71           71    +0
99   Happyinheaven        3    54.5    99   0.00     6.0   -     71           71    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Madison Valley - 116 6 +110 3.0 -
2 Electric Storm Line 76 70 76 -6 6.0
3 Imaginable 66 92 75 +17 6.0 -
4 King's Island 69 72 85 -13 3.0 -
5 Gijima Mfana 60 50 94 -44 0.0 -
6 Triton 59 52 82 -30 6.0 -
7 Swift Nicks 64 60 82 -22 6.0 -
8 Master Owl - 52 78 -26 6.0 -
9 Du Cane 48 45 94 -49 0.0 -
10 Roy's Ruffian 20 20 94 -74 0.0 -
99 Mayor Of Merrivale - 59 94 -35 0.0 -
99 Off Limits - 73 71 +2 6.0 -
99 Happyinheaven - 58 71 -13 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