A knight on the rim is dim.
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[Event "rated untimed match"]
[Site "?"]
[Date "1960.??.??"]
[Round "?"]
[White "Ykes"]
[Black "Flad"]
[Result "0-1"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "k5r1/pp4pp/5n2/qP2Q1N1/3Pp3/2r1P3/5PPP/R1R3K1 b - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1... Rgc8 { White resigned here.|White cannot defend c1. } 2. Rf1 ( { White can
try: } 2. Rxc3 Qxa1+ 3. Rc1 Qxc1# ) ( { White can also try: } 2. h3 Rxc1+ 3. Rxc1 Rxc1+ { Black wins with a large material advantage. } ) 2... Qxa1 3. Rxa1 Rc1+ 4. Rxc1 Rxc1# 0-1