Official NHA Assessment

Race 3: LUCKY FISH BOOK OF POSEIDON OPEN MAIDEN (F & M) (For all Maiden Fillies & Mares.)

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Line Horse
Roy's Grace
Reference for assessment
Exact Matches
1 / 10
Calculated = Official
Close Matches
2 / 10
Within 2 points
Significant Diffs
5 / 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    Captain's Jet        2    58.5    1    0.00     0.0   -     64           6     +6
2    Roy's Grace          4    58.0    2    1.10     4.0   59    59           59    +0
3    Queen Of The Air     3    60.0    3    1.15     7.0   63    57           57    -6
4    Run For Peace        3    55.5    4    3.05     7.0   54    46           46    -8
5    Baltic Assayer       2    54.5    5    3.35     0.0   60    57           57    -3
6    Sugar Baby Love      3    54.5    6    5.55     7.0   -     42           42    +42
7    Dee Day              4    52.5    7    7.65     4.0   56    44           46    -10
8    Chef's Kiss          4    53.5    8    9.75     4.0   44    46           46    +2
9    Vinny's Dream        3    55.0    9    12.55    7.0   53    43           43    -10
10   Hold Your Fire       3    58.5    10   14.85    7.0   -     50           50    +50
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Captain's Jet - 79 6 +73 0.0 -
2 Roy's Grace Line 59 63 59 +4 4.0
3 Queen Of The Air 63 61 57 +4 7.0 -
4 Run For Peace 54 54 46 +8 7.0 -
5 Baltic Assayer 60 53 57 -4 0.0 -
6 Sugar Baby Love - 67 42 +25 7.0 -
7 Dee Day 56 53 46 +7 4.0 -
8 Chef's Kiss 44 46 46 ✓ Match 4.0 -
9 Vinny's Dream 53 45 43 +2 7.0 -
10 Hold Your Fire - - 50 -50 7.0 -
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