Official NHA Assessment

Race 5: RACEHORSE OWNERS ASSOCIATION MR 84 HANDICAP (Open)

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Line Horse
Have A Go Jo
Reference for assessment
Exact Matches
0 / 13
Calculated = Official
Close Matches
1 / 13
Within 2 points
Significant Diffs
9 / 13
More than 5 points
Detailed Assessment
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Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Naval Guard          4    52.0    1    0.00     2.0   67    68           67    +0
2    Raiseahallelujah     7    58.5    2    2.25     0.0   81    90           90    +9
3    Have A Go Jo         4    58.0    3    5.75     2.0   80    80           80    +0
4    Madabout Fashion     3    53.0    4    6.00     4.5   79    65           69    -10
5    Western Fort         5    61.0    5    7.75     0.0   86    90           90    +4
6    Kool Baikal          5    52.0    6    8.00     0.0   68    72           72    +4
7    Duke Of Sussex       4    58.5    7    11.00    2.0   81    81           81    +0
8    Fifth Of July        5    57.0    8    16.00    0.0   78    82           82    +4
9    Devilish Dancer      4    53.0    9    18.00    2.0   70    70           70    +0
10   Snow Palace          5    56.0    10   30.00    0.0   76    80           80    +4
99   Apollo Robbins       5    54.5    99   0.00     0.0   -     77           77    +0
99   Jive Express         6    53.5    99   0.00     0.0   -     75           75    +0
99   Ideal Jet            4    59.5    99   0.00     2.0   -     83           83    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Naval Guard 67 93 67 +26 2.0 -
2 Raiseahallelujah 81 103 90 +13 0.0 -
3 Have A Go Jo Line 80 70 80 -10 2.0
4 Madabout Fashion 79 72 69 +3 4.5 -
5 Western Fort 86 76 90 -14 0.0 -
6 Kool Baikal 68 67 72 -5 0.0 -
7 Duke Of Sussex 81 96 81 +15 2.0 -
8 Fifth Of July 78 63 82 -19 0.0 -
9 Devilish Dancer 70 50 70 -20 2.0 -
10 Snow Palace 76 87 80 +7 0.0 -
99 Apollo Robbins - 69 77 -8 0.0 -
99 Jive Express - 70 75 -5 0.0 -
99 Ideal Jet - 81 83 -2 2.0 -
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