Official NHA Assessment

Race 4: TAB TELEBET 0861 000 822 MAIDEN PLATE (For all Maidens)

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Line Horse
Circus Lights
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
1 / 9
Within 2 points
Significant Diffs
5 / 9
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    Black Lightning      2    59.0    1    0.00     0.0   66    65           65    -1
2    Puerto Plata (ARG)   3    59.0    2    0.25     6.0   -     53           53    +53
3    Circus Lights        5    59.0    3    2.50     0.0   67    67           67    +0
4    Wonderworld          2    59.0    4    2.75     0.0   69    67           67    -2
5    Sky Velocity         5    56.0    5    3.00     0.0   69    61           61    -8
6    Kambulu              3    59.0    6    3.25     6.0   -     55           55    +55
7    Keep The Fort        3    56.5    7    7.00     6.0   -     48           48    +48
8    Alice May            3    56.0    8    9.75     6.0   61    47           51    -10
99   Fantastic Impact (A  4    60.0    99   0.00     3.0   -     61           61    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Black Lightning 66 64 65 -1 0.0 -
2 Puerto Plata (ARG) - 68 53 +15 6.0 -
3 Circus Lights Line 67 64 67 -3 0.0
4 Wonderworld 69 64 67 -3 0.0 -
5 Sky Velocity 69 57 61 -4 0.0 -
6 Kambulu - 64 55 +9 6.0 -
7 Keep The Fort - 66 48 +18 6.0 -
8 Alice May 61 60 51 +9 6.0 -
99 Fantastic Impact (AUS) - 47 61 -14 3.0 -
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