This problem is just used my thinking "What happenes if used color is only one" So if you don't like it or wanna say "Not go", then you can click next or back.
(;SZ[3]AB[ac]AB[bc]AB[cc]C[Irregular rules: Used color in this game is only Black. Triangled Black to play. Encampment bigger wins. Good luck! FORCE]AB[ab]TR[ab]AB[ba]TR[ba]AP[goproblems]
(;B[aa]TR[ab]TR[aa]TR[ba]AB[aa]C[Your enemy can pass, both players get no point.])
(;B[ca]TR[ab]TR[ba]TR[ca]C[Your enemy can pass, both players get no point.])
(;B[bb]TR[ab]TR[bb]TR[ba]C[.FORCE]
(;W[aa]AB[aa]TR[ab]TR[bb]TR[ba]C[.FORCE]
(;B[ca]TR[ab]TR[bb]TR[ba]TR[ca]C[Both players don't frame any points. Draw.])
(;B[cb]TR[cb]TR[bb]TR[ab]TR[ba]LB[ca:X]C[Both players can't play anymore but triangled Black framed one point and no chanse to use White by the rules so you won.RIGHT]))
(;W[ca]AB[ca]TR[ab]TR[bb]TR[ba]C[.FORCE]
(;B[aa]TR[bb]TR[ab]TR[aa]TR[ba]C[Both players don't frame any points. Draw.])
(;B[cb]TR[cb]TR[bb]TR[ab]TR[ba]LB[aa:X]C[Both players can't play anymore but triangled Black framed one point and no chanse to use White by the rules so you won.RIGHT]))
(;W[cb]AB[cb]TR[ab]TR[bb]TR[ba]C[.FORCE]
(;B[aa]TR[bb]TR[ab]TR[aa]TR[ba]C[Both players don't frame any points. Draw.])
(;B[ca]TR[ab]TR[bb]TR[ba]TR[ca]LB[aa:X]C[Both players can't play anymore but triangled Black framed one point and no chanse to use White by the rules so you won.RIGHT])))
(;B[cb]TR[ab]TR[ba]TR[cb]C[.FORCE]
(;W[aa]AB[aa]TR[ab]TR[ba]TR[cb]C[.FORCE]
(;B[bb]TR[bb]TR[ab]TR[ba]TR[cb]LB[ca:X]C[Both players can't play anymore but triangled Black framed one point and no chanse to use White by the rules so you won.RIGHT])
(;B[ca]TR[ab]TR[ba]TR[ca]TR[cb]C[Both players don't frame any points. Draw.]))
(;W[ca]AB[ca]TR[ab]TR[ba]TR[cb]C[.FORCE]
(;B[aa]TR[ab]TR[aa]TR[ba]TR[cb]C[Both players don't frame any points. Draw.])
(;B[bb]TR[cb]TR[bb]TR[ab]TR[ba]LB[aa:X]C[Both players can't play anymore but triangled Black framed one point and no chanse to use White by the rules so you won.RIGHT]))))
