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How to get the killer king achievement

Killer King is when the king is moved for a discovered checkmate
I wish I could recall the position I once saw when the King kill was a forced move.

Killer King is when the king is moved for a discovered checkmate
I wish I could recall the position I once saw when the King kill was a forced move.
I don't know of anyone who has the killer king, I've seen seen how it could be done. However, I haven't even seen it in a puzzle.

https://www.chess.com/analysis/game/live/5266618201
Hardly GM level, but here is how I earnt my only Killer King award. The only interesting thing about it is that my Komodo opponent's King journeyed the length of the board to meet his fate.

https://au.video.search.yahoo.com/yhs/search;_ylt=AwrWpynspxNikwEA4xE36At.;_ylu=Y29sbwNncTEEcG9zAzIEdnRpZAMEc2VjA3Nj?p=edward+lasker&ei=UTF-8&type=symn_9123_CHW_AU_tid119¶m1=RypDRDjp20T5Vc76fVk9yA%3D%3D¶m2=9dUI1n2R0BLDxNuWfiP4aSFOTltNdSPoIx38%2BUf%2FiXrvPdoGmStdlfwLFZYDvqkAJrWWk4yNReCLnBD%2FqPsDZd7olTZcV8HMx1G%2Fk786sE2Tis1g8dJd8zxVWs%2BbKztBnq1TfqUiqPYK9pXifXmJF23GuXP%2F%2FuMqmznMxQq%2BppDvdk5uyfjiAXDOapO5aU4hr0GUZjaSLWIOie4Zaqma66Ec0t%2FOjTJZs2B78QhRRB6%2FGSRjtD73i3r7Km1qVsULyhsHRLlKEcq2jUZVNG5Jn7xy505jTt3R5tQ%2FZRr%2BI1g%3D¶m3=NwVEMR%2FzKcG52XsVBYEh2zk2Yklq85vdfspZPoqz2M0GPSOQNHft4g16R4VhbFFcf3LZo6QJGjyOUbWVUN9c4%2BOT8g01E274gOUvSqOunIv74awY%2B%2B%2B4Z0p7xddZXKOONyDjzpQJ9Tdf8%2F9RXP4l%2Be8rd6SwjVLV4M0Z1AyGBFVuisrfXmbdUAhgVcSFysk08aDw7q8JHFhVSaFlc3go6Om9Wu13gTP8hueF6sh9k29cUFhU1kEeurOx9RBJcyWtdfRRCo7yuGSrJDgeuMTU3WfNVU5enlzqT2JsHDflm01EJl%2BcARKWsa2sfMg2S4byqoN8gILfPnWny%2BUQDtR%2Fku3D90IFIKwhnZYSp6XVgPd1QfZXLT68MBmT1zrvxti1¶m4=gQ4aUAPsY%2BpEa0QuDrTM6%2Byu0yUgDPOpDVqk3Ap%2Bkqo%3D&hsimp=yhs-syn_launcham&hspart=iba&fr=yhs-iba-syn_launcham#id=1&vid=aae83a216f2d502a8aa5ae5a20b9d49e&action=view

That was the famous Edward Lasker vs Sir George Thomas game. The mate could have been delivered by castling queenside as well.

https://www.chess.com/analysis/game/daily/371308107
A Killer Pawn Game. Where was the Killer Pawn? It seems to have vanished!

https://www.chess.com/analysis/game/live/5266618201
Hardly GM level, but here is how I earnt my only Killer King award. The only interesting thing about it is that my Komodo opponent's King journeyed the length of the board to meet his fate.
Well done, killer King is not easy to do, now I've seen killer King in a game.
Please help