Official NHA Assessment

Race 7: MICHAEL ROBERTS STAKES (Listed) (For All Horses)

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Line Horse
Fight Song
Reference for assessment
Exact Matches
0 / 15
Calculated = Official
Close Matches
4 / 15
Within 2 points
Significant Diffs
7 / 15
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    Gentleman's Wager    7    58.5    1    0.00     0.0   103   105          105   +2
2    Sir Michael          5    52.5    2    0.70     0.0   90    98           98    +8
3    Fight Song           4    52.0    3    0.95     3.0   90    90           90    +0
4    Decorated            4    52.5    4    1.45     3.0   81    90           90    +9
5    Astrix               5    61.0    5    3.15     0.0   112   112          112   +0
6    Crown Towers (AUS)   6    61.5    6    3.75     0.0   117   112          112   -5
7    Capoeira             6    60.5    7    3.90     0.0   109   110          110   +1
8    G G's Dynasty        6    58.5    8    4.30     0.0   103   105          105   +2
9    Tread Swiftly        4    54.5    9    5.05     3.0   95    91           91    -4
10   News Stream          6    53.5    10   5.35     0.0   93    95           95    +2
11   Magical Midlands     4    52.0    11   10.75    3.0   90    86           86    -4
12   Wealthy              9    52.5    12   11.35    0.0   91    93           93    +2
13   Spring Fling         6    53.0    13   13.55    0.0   92    94           94    +2
14   Sea Master           4    52.0    14   14.45    3.0   88    86           86    -2
99   Tristful             6    61.0    99   0.00     0.0   -     110          110   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Gentleman's Wager 103 106 105 +1 0.0 -
2 Sir Michael 90 81 98 -17 0.0 -
3 Fight Song Line 90 94 90 +4 3.0
4 Decorated 81 96 90 +6 3.0 -
5 Astrix 112 118 112 +6 0.0 -
6 Crown Towers (AUS) 117 113 112 +1 0.0 -
7 Capoeira 109 102 110 -8 0.0 -
8 G G's Dynasty 103 100 105 -5 0.0 -
9 Tread Swiftly 95 90 91 -1 3.0 -
10 News Stream 93 83 95 -12 0.0 -
11 Magical Midlands 90 79 86 -7 3.0 -
12 Wealthy 91 90 93 -3 0.0 -
13 Spring Fling 92 96 94 +2 0.0 -
14 Sea Master 88 99 86 +13 3.0 -
99 Tristful - 107 110 -3 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