Official NHA Assessment

Race 6: FOR HOSPITALITY BOOKINGS CALL 011 681 1796 MR 66 HANDICAP (Open)

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Line Horse
Sail The Sky
Reference for assessment
Exact Matches
1 / 12
Calculated = Official
Close Matches
6 / 12
Within 2 points
Significant Diffs
5 / 12
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    Sea Shanty           4    58.5    1    0.00     0.5   63    60           63    +0
2    Calida               2    61.5    2    1.60     0.0   69    70           70    +1
3    Sail The Sky         4    60.5    3    2.10     0.5   67    67           67    +0
4    Stroke Of Mercy      5    52.0    4    2.70     0.0   58    50           50    -8
5    After Hours          7    61.5    5    4.30     0.0   69    67           67    -2
6    Call Me Master       8    60.0    6    4.70     0.0   66    64           64    -2
7    Northern Kitten      3    55.0    7    5.10     2.0   56    50           50    -6
8    Arctic Vixen         2    61.0    8    6.80     0.0   68    66           66    -2
9    Can't Catch Me       5    52.5    9    9.30     0.0   51    49           49    -2
10   Gimme The Flame      5    52.5    10   10.40    0.0   50    49           49    -1
11   Sahara Dawn          4    58.0    11   10.65    0.5   62    59           59    -3
12   Countess Danza       5    54.5    12   12.45    0.0   55    53           53    -2
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Sea Shanty 63 71 63 +8 0.5 -
2 Calida 69 72 70 +2 0.0 -
3 Sail The Sky Line 67 62 67 -5 0.5
4 Stroke Of Mercy 58 52 50 +2 0.0 -
5 After Hours 69 79 67 +12 0.0 -
6 Call Me Master 66 65 64 +1 0.0 -
7 Northern Kitten 56 67 50 +17 2.0 -
8 Arctic Vixen 68 66 66 ✓ Match 0.0 -
9 Can't Catch Me 51 58 49 +9 0.0 -
10 Gimme The Flame 50 50 49 +1 0.0 -
11 Sahara Dawn 62 52 59 -7 0.5 -
12 Countess Danza 55 51 53 -2 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