a)
1.Ned4! zz
1…Kc1 2.Kc3 Kd1 3.Bg6 Kc1 4.Nb3+ Kb1 5.Nb4# [Mirror and complete economical mate]
4…Kd1 5.Bh5#
b)
1.Ng3! zz
1…Kc1 2.Kc3 Kd1 3.Nb4 Kc1 4.Nd3+ Kd1 5.Bb3# [Mirror and complete economical mate]
3…Ke1 4.Nd3+ Kd1 5.Bb3#
c)
1.Kc3? zz
1...Kc1 2.Bd5 Kb1 3.Na3+ Kc1 4.Nd3+ Kd1 5.Bf3#
2...Kd1 3.Nd3 Ke2 4.Bg2 Kd1 5.Bf3#
but 1...Ke2!
1.Bd5! zz
1…Kc1 2.Kc3 Kb1 3.Na3+ Kc1 4.Nd3+ Kd1 5.Bf3# [Mirror and complete economical mate]
2…Kd1 3.Nd3 [4.Bf3#] Ke2 4.Bg2 Kd1 5.Bf3#
d)
1.Ke3? zz
1...Ke1 2.Nhf4 Kf1 3.Be6 Ke1 4.Nd3+ Kd1 5.Bb3#
4...Kf15.Bh3#
2...Kd1 3.Nd3 Kc2 4.Ba2 Kd1 5.Bb3#
but 1...Kc2!
1.Ngf4! zz
1…Ke1 2.Ke3 Kd1 3.Nd3 [4.Bb3#] Kc2 4.Ba2 Kd1 5.Bb3#
2…Kf1 3.Be6 Ke1 4.Nd3+ Kd1 5.Bb3#
4…Kf1 5.Bh3#
Tanagra with 4 twin positions obtained by moving one of the three pieces (excluding the King) from the
initial position. Each position gives rise to at least one complete economical mate, and three positions
accumulate with a mirror mate.
