Sally Simpson: Hi Esauwept,
A few good lessons here.
Black went combining (playing for tricks and traps) allowing a defending check. You will often see the good guys tucking their Kings out of the way even when there is no apparant danger.  click for larger viewPLaying Kb1 (or Kb8) after 0-0-0 and Kh8 (or Kh1) often before moving their f-pawns. A lot of combinations have been undone because of a sudden defending check.
Experience either though studying games like this one or more usually a bad
result in one of our own games has taught us leaving checks on in any position can backfire. Here
 click for larger viewBlack knows that a Knight on f4 backed up with a Queen v a castled position can be deadly
so went for it. Note here no check in the position and this possibly misguided Black. 15...Nf4
Saccing the d-pawn and allowing a double-attack on the c6 Knight. 16.Nxd4
 click for larger viewBlack wanted his Queen on the Kingside and now played. 16...e5
Daring White to take c6 Knight. Which he did. The move 16...e5 has place a check on the board.  click for larger view17. Nxc6 Qg4 18. g3 Rf6 19. Kh1 ...
 click for larger viewThis is the set up Black had in mind when he decided to sac the c6 Knight
and was propably intending here to play 19...Rh6. Only now he saw the Qb3+
and that defends all the threats.
If we place the Black King on h8 and play 19....Rh6
 click for larger viewWhite has no defence and is soon mated.
The threat is 20...Rxh2+ 21.Kxh2 Qh3+ and Qg2 mate. Note the strength of that Knight on f4. If White takes the Knight 20.gxf4 Qh3.
 click for larger viewThere is primary threat of Rh6, the mate on h2 you were asking about.
The only move to stop it is 21.Nf3 Qxf3+ 22.Kg1 Rg6 mate.  click for larger viewBut as we now know and Black discovered in the game, Qb3+ stopped all these lines. ----
What happens next?
Although you are now aware of the dangers of allowing a check in any position
and I could show you another 20 examples, it will not be until you have
been caught mid-combination with an unexpected check in one of your own games till the lesson sinks home. Don't worry, it was the same with all us.
We all have to feel the burn before we learn.
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Nice piece of Morphy here with a Black Knight on f4 and a Queen conducting an attack v a castled position. Saint Amant / M.F. de B vs Morphy, 1858 |