Posición 561: Jackson – Marshall

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1.e4e52.c4f63.d3d54.exd5xd55.e2c66.f4c57.f3g48.h3xf39.xf3b610.b5O-O11.xc6bxc612.f5e413.dxe4e814.c3d515.g3b416.e2d417.f1d518.g2xc319.bxc3xe4+20.xe4xe421.f3ae822.d2e223.ad1f2+24.g4h5+25.xh5g6+26.fxg6e5+27.g4f5+28.h4g729.f4xg630.g5Posición táctica30...f4+ [ ..30 f4+ 31. gxf4 ( 31. g4 f2# ) ( 31. xf4 e7+ 32. g5 xg5# ) f2# ] 0-1