Official NHA Assessment

Race 5: RACEHORSE OWNERS ASSOCIATION MR 80 HANDICAP (Open)

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Line Horse
Gold Rock
Reference for assessment
Exact Matches
1 / 15
Calculated = Official
Close Matches
3 / 15
Within 2 points
Significant Diffs
8 / 15
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    Moon Game            4    60.0    1    0.00     5.0   80    70           80    +0
2    Gold Rock            5    57.0    2    0.25     0.0   74    74           74    +0
3    Africa's Rock        4    57.0    3    0.35     5.0   77    69           69    -8
4    Bold Resolve         4    61.5    4    0.45     5.0   83    78           78    -5
5    Zatara Magic         5    55.0    5    0.70     0.0   86    75           76    -10
6    Slings And Arrows    3    58.5    6    1.95     8.0   78    64           68    -10
7    Irish Willow         4    61.5    7    3.20     5.0   83    75           75    -8
8    Alpha Pappa          5    57.5    8    3.70     0.0   75    76           76    +1
9    Ivalo's Prince       5    59.5    9    7.70     0.0   79    79           79    +0
10   Daleel               3    53.0    10   7.95     8.0   67    50           57    -10
11   Royal Shindig        4    54.0    11   8.05     5.0   68    58           58    -10
12   Gavel Strike         4    60.5    12   9.55     5.0   81    71           71    -10
13   Back To You          3    56.5    13   13.80    8.0   74    57           64    -10
14   Son Of Zeus          3    57.0    14   13.90    8.0   75    58           65    -10
15   Coffee Break         3    59.0    15   14.15    8.0   79    62           69    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Moon Game 80 89 80 +9 5.0 -
2 Gold Rock Line 74 72 74 -2 0.0
3 Africa's Rock 77 70 69 +1 5.0 -
4 Bold Resolve 83 91 78 +13 5.0 -
5 Zatara Magic 86 114 76 +38 0.0 -
6 Slings And Arrows 78 92 68 +24 8.0 -
7 Irish Willow 83 80 75 +5 5.0 -
8 Alpha Pappa 75 73 76 -3 0.0 -
9 Ivalo's Prince 79 62 79 -17 0.0 -
10 Daleel 67 66 57 +9 8.0 -
11 Royal Shindig 68 62 58 +4 5.0 -
12 Gavel Strike 81 71 71 ✓ Match 5.0 -
13 Back To You 74 70 64 +6 8.0 -
14 Son Of Zeus 75 81 65 +16 8.0 -
15 Coffee Break 79 65 69 -4 8.0 -
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