Official NHA Assessment

Race 6: FOR HOSPITALITY BOOKINGS CALL 011 681 1796 MR 100 HANDICAP (Open)

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Line Horse
Mount Darwin
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
0 / 11
Within 2 points
Significant Diffs
8 / 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    Obsidian             3    55.0    1    0.00     9.0   91    85           91    +0
2    Mount Darwin         3    54.5    2    0.40     9.0   89    89           89    +0
3    Mastership           2    55.5    3    0.60     0.0   91    109          109   +18
4    Master Christmas     4    58.0    4    1.90     7.0   94    98           98    +4
5    Strewn Sky           2    48.0    5    3.70     0.0   80    90           90    +10
6    Soldier's Eye        4    60.0    6    4.30     7.0   100   99           99    -1
7    Supreme Dance        4    52.0    7    4.60     7.0   82    83           83    +1
8    Street Art           3    55.0    8    4.80     9.0   90    85           85    -5
9    Ikigai               8    55.5    9    5.30     0.0   91    104          104   +13
10   Jury's Out           2    55.0    10   8.50     0.0   90    103          103   +13
99   Infinite Wonder      7    58.0    99   0.00     0.0   -     109          109   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Obsidian 91 97 91 +6 9.0 -
2 Mount Darwin Line 89 81 89 -8 9.0
3 Mastership 91 105 109 -4 0.0 -
4 Master Christmas 94 94 98 -4 7.0 -
5 Strewn Sky 80 69 90 -21 0.0 -
6 Soldier's Eye 100 94 99 -5 7.0 -
7 Supreme Dance 82 76 83 -7 7.0 -
8 Street Art 90 78 85 -7 9.0 -
9 Ikigai 91 91 104 -13 0.0 -
10 Jury's Out 90 85 103 -18 0.0 -
99 Infinite Wonder - 86 109 -23 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