Official NHA Assessment

Race 4: 4RACING.TV MR 68 HANDICAP (Open)

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Line Horse
Bonnaroo
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
3 / 11
Within 2 points
Significant Diffs
5 / 11
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    Great Melody         3    58.0    1    0.00     3.5   64    64           64    +0
2    Jaquar Cat           3    52.5    2    0.50     3.5   56    53           53    -3
3    Bonnaroo             3    59.5    3    0.55     3.5   67    67           67    +0
4    Psychedelic Eric     3    54.5    4    1.05     3.5   57    57           57    +0
5    Roger The Dodger     5    55.0    5    1.10     0.0   57    65           65    +8
6    Callmemrgreenlight   3    50.0    6    1.20     3.5   52    48           48    -4
7    Sanctity             4    56.5    7    1.30     4.0   61    60           60    -1
8    I Like It Hot        2    60.5    8    1.55     2.5   74    71           71    -3
9    Miss Rose            3    55.0    9    5.55     3.5   58    58           58    +0
10   Isn't It Bliss       4    53.0    10   13.05    4.0   53    53           53    +0
11   Seismic Event        2    58.5    11   20.55    2.5   70    67           67    -3
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Great Melody 64 79 64 +15 3.5 -
2 Jaquar Cat 56 46 53 -7 3.5 -
3 Bonnaroo Line 67 84 67 +17 3.5
4 Psychedelic Eric 57 50 57 -7 3.5 -
5 Roger The Dodger 57 51 65 -14 0.0 -
6 Callmemrgreenlight 52 45 48 -3 3.5 -
7 Sanctity 61 61 60 +1 4.0 -
8 I Like It Hot 74 76 71 +5 2.5 -
9 Miss Rose 58 57 58 -1 3.5 -
10 Isn't It Bliss 53 51 53 -2 4.0 -
11 Seismic Event 70 70 67 +3 2.5 -
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