bound TFT-ATFT solution for n=3 m=1 : 256 m=2 : 65,536 m=3 : 18,446,744,073,709,551,616 222m <latexit sha1_base64="SnIU+E5cPeQhQyyV4MGmqG9JhrI=">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</latexit> Yi et al., JTB (2017) → 4 friendly rivals → 0 friendly rivals # of memory-m strategies: → 4,261,844,305,281 friendly rivals most of them are so complicated strategies