This indeed could have a been a 'twist in the tale' (sic)
Loyd announced a mate in 8 in the following position.
My source in
Blunders & Brilliancies where they have Loyd as White.
Newe Orleans 1867. I think this is a mistake.
However I shall use their example.
It's the same postion and move order as Heinz just colours reversed.
(but....)
[FEN "2k4r/Rpp5/r4N2/6p1/1q1n3p/3P3P/2P2PP1/3Q1RK1 w - - 0 1"]
[SetUp "1"]
{--------------
. . k . . . . r
R p p . . . . .
r . . . . N . .
. . . . . . p .
. q . n . . . p
. . . P . . . P
. . P . . P P .
. . . Q . R K .
white to play
--------------}
1. Ra8+ Rxa8 2. Qg4+ Kb8 3. Nd7+ Kc8 4. Nb6+ Kb8 5. Qc8+ Rxc8 6. Nd7+ Ka7
7. Ra1+ Qa5 8. Rxa5#
{White mates} 1-0
So the famous Sam Loyd announces mate in 8.
What do you do but resign.
However.... It's cooked and Black could have 'won on a technicality.'
[FEN "2k4r/Rpp5/r4N2/6p1/1q1n3p/3P3P/2P2PP1/3Q1RK1 w - - 0 1"]
[SetUp "1"]
{--------------
. . k . . . . r
R p p . . . . .
r . . . . N . .
. . . . . . p .
. q . n . . . p
. . . P . . . P
. . P . . P P .
. . . Q . R K .
white to play
--------------}
1. Ra8+ Rxa8 2. Qg4+ Kb8 3. Nd7+ Kc8 4. Nb6+ Kb8 5. Qc8+ Ka7