Official NHA Assessment

Race 6: PORT ELIZABETH GOLD CUP (Listed) (Open)

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Line Horse
Heathcliff
Reference for assessment
Exact Matches
1 / 12
Calculated = Official
Close Matches
1 / 12
Within 2 points
Significant Diffs
8 / 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    Top Quality          3    57.0    1    0.00     3.5   95    91           91    -4
2    Heathcliff           2    57.0    2    3.50     0.0   100   100          100   +0
3    Wildest Dreams       3    51.5    3    6.25     3.5   81    80           80    -1
4    Chewbaca             5    55.0    4    6.35     0.0   89    94           94    +5
5    Jaeger Moon          7    60.0    5    7.10     0.0   102   104          104   +2
6    Great Affair         7    50.0    6    8.35     0.0   67    84           84    +17
7    Zatara Magic         5    54.0    7    21.10    0.0   90    92           92    +2
8    Never Ending Rain    3    60.0    8    27.85    3.5   101   97           97    -4
9    Silver Host          6    62.0    9    35.10    0.0   111   108          108   -3
10   American Landing     7    54.0    10   99.98    0.0   80    92           92    +12
11   Understated          5    50.0    11   99.98    0.0   50    84           84    +34
99   Super Silver         3    54.0    99   0.00     3.5   -     85           85    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Top Quality 95 99 91 +8 3.5 -
2 Heathcliff Line 100 100 100 ✓ Match 0.0
3 Wildest Dreams 81 87 80 +7 3.5 -
4 Chewbaca 89 87 94 -7 0.0 -
5 Jaeger Moon 102 97 104 -7 0.0 -
6 Great Affair 67 63 84 -21 0.0 -
7 Zatara Magic 90 114 92 +22 0.0 -
8 Never Ending Rain 101 101 97 +4 3.5 -
9 Silver Host 111 111 108 +3 0.0 -
10 American Landing 80 80 92 -12 0.0 -
11 Understated 50 50 84 -34 0.0 -
99 Super Silver - 82 85 -3 3.5 -
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