Official NHA Assessment

Race 7: BETWAY SUMMER CUP 29 NOVEMBER MIDDLE STAKES (For horses with nett rating of 105 and below)

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Line Horse
Slinky Mapimpi
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
2 / 9
Within 2 points
Significant Diffs
7 / 9
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    Bob's Your Uncle     5    55.5    1    0.00     0.0   97    88           88    -9
2    Max The Magician     4    58.0    2    0.80     5.0   96    87           87    -9
3    Paul Revere          3    52.0    3    1.00     8.0   84    69           74    -10
4    Slinky Mapimpi       5    60.0    4    1.80     0.0   100   100          100   +0
5    Aladdin's Lamp       4    56.0    5    2.05     5.0   93    82           83    -10
6    French Bolt          3    56.0    6    2.45     8.0   94    75           84    -10
7    Silver Tudor         5    58.0    7    4.55     0.0   94    93           93    -1
8    That's My Baby       2    60.0    8    6.25     0.0   102   97           97    -5
9    Champion Warrior     3    56.0    9    7.15     8.0   92    73           82    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Bob's Your Uncle 97 103 88 +15 0.0 -
2 Max The Magician 96 95 87 +8 5.0 -
3 Paul Revere 84 92 74 +18 8.0 -
4 Slinky Mapimpi Line 100 101 100 +1 0.0
5 Aladdin's Lamp 93 106 83 +23 5.0 -
6 French Bolt 94 92 84 +8 8.0 -
7 Silver Tudor 94 99 93 +6 0.0 -
8 That's My Baby 102 97 97 ✓ Match 0.0 -
9 Champion Warrior 92 97 82 +15 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