Official NHA Assessment

Race 7: TAB SENOR SANTA STAKES (Grade 2) (Open)

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Line Horse
Pistol Pete
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
1 / 9
Within 2 points
Significant Diffs
3 / 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    Chasing Happiness    3    53.5    1    0.00     3.0   109   110          110   +1
2    Mrs Browning         5    55.5    2    1.70     0.0   113   120          120   +7
3    Truth                2    56.0    3    1.75     2.0   115   117          117   +2
4    Pistol Pete          3    56.0    4    2.05     3.0   115   115          115   +0
5    Mount Pilatus        4    58.0    5    2.75     3.5   112   118          118   +6
6    Melech               5    60.0    6    4.25     0.0   119   129          129   +10
7    Taxi To The Moon     3    54.0    7    4.50     3.0   110   111          111   +1
8    Chyavana             3    54.0    8    6.50     3.0   104   111          111   +7
9    Magic Tattoo         5    54.0    9    7.25     0.0   104   117          117   +13
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Chasing Happiness 109 110 110 ✓ Match 3.0 -
2 Mrs Browning 113 115 120 -5 0.0 -
3 Truth 115 120 117 +3 2.0 -
4 Pistol Pete Line 115 118 115 +3 3.0
5 Mount Pilatus 112 113 118 -5 3.5 -
6 Melech 119 118 129 -11 0.0 -
7 Taxi To The Moon 110 119 111 +8 3.0 -
8 Chyavana 104 106 111 -5 3.0 -
9 Magic Tattoo 104 93 117 -24 0.0 -
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