手机友好的单步将杀国际象棋谜题图片

制作一张有趣的国际象棋一步杀棋谜题图片。将图片比例调整为便于在手机上查看。

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**Original English:**
Make an image of an interesting mate-in-1 chess puzzle. Make the aspect ratio such that it's easy to view on a phone.