user33919: I am extremely new to chess and have been working through some "mate in one" problems on chesspuzzles.com for practice. This one has me very confused though:

The stated answer is:

 Bg6#

But why? Can't black's king move to d8 or e7 after that? I feel like I must be missing something very obvious, but can't for the life of me see what it is...

user32155: You are absolutely right! The black king can move to d8 and e7 and then there's no follow up mate. Most probably there's a white queen/bishop on h4 to prevent the black king from escaping (which is not shown in the figure). In that case, Bg6# is a checkmate.
[Title "Mate in One"]
[FEN "r1b1kb1r/pp1n2p1/1qp1p2p/8/2PP3Q/3B1N2/P4PPP/R4RK1 w Qkq - 0 1"]


33919: <p>I am extremely new to chess and have been working through some &quot;mate in one&quot; problems on chesspuzzles.com for practice. This one has me very confused though:</p>
<p><a href="https://i.stack.imgur.com/cGEso.png" rel="noreferrer"><img src="https://i.stack.imgur.com/cGEso.png" alt="A mate in on chess problem" /></a></p>
<p>The stated answer is:</p>
<blockquote class="spoiler">
<p> Bg6#</p>
</blockquote>
<p>But why? Can't black's king move to d8 or e7 after that? I feel like I must be missing something very obvious, but can't for the life of me see what it is...</p>
 32155: <p>You are absolutely right! The black king can move to d8 and e7 and then there's no follow up mate. Most probably there's a white queen/bishop on h4 to prevent the black king from escaping (which is not shown in the figure). In that case, Bg6# is a checkmate.</p>
<pre><code>[Title &quot;Mate in One&quot;]
[FEN &quot;r1b1kb1r/pp1n2p1/1qp1p2p/8/2PP3Q/3B1N2/P4PPP/R4RK1 w Qkq - 0 1&quot;]
</code></pre>
