Official NHA Assessment

Race 5: TAKE A BET WINA NUMBA NUMBA WORK RIDERS MAIDEN PLATE (For all Maidens)

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Line Horse
Chieftain's Shield
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
7 / 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    Sky Pillar Rock      3    60.0    1    0.00     2.5   72    61           61    -11
2    Chieftain's Shield   4    60.0    2    0.20     1.0   64    64           64    +0
3    Mystic Vision        3    60.0    3    2.50     2.5   70    63           63    -7
4    Two For The Boys     3    60.0    4    3.50     2.5   -     62           62    +62
5    Royal Miracle        3    60.0    5    7.00     2.5   72    61           62    -10
6    Euphrates            3    61.0    6    8.75     2.5   -     63           63    +63
7    Sovereign Crown      3    60.0    7    12.50    2.5   71    61           61    -10
8    Codeword             2    57.0    8    12.75    0.0   -     60           60    +60
9    Grand Legacy         3    60.0    9    29.50    2.5   -     61           61    +61
10   First Arrow          3    60.0    10   99.99    2.5   -     61           61    +61
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Sky Pillar Rock 72 81 61 +20 2.5 -
2 Chieftain's Shield Line 64 80 64 +16 1.0
3 Mystic Vision 70 66 63 +3 2.5 -
4 Two For The Boys - 61 62 -1 2.5 -
5 Royal Miracle 72 66 62 +4 2.5 -
6 Euphrates - 70 63 +7 2.5 -
7 Sovereign Crown 71 68 61 +7 2.5 -
8 Codeword - 54 60 -6 0.0 -
9 Grand Legacy - - 61 -61 2.5 -
10 First Arrow - - 61 -61 2.5 -
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