Anthology of Helpmates. Part I
World champions A. and V. Semenenko systematise helpmates in three.
A. Semenenko
Anthology of Helpmates. Part II
The second part of world champions A. and V. Semenenko's systematisation of helpmates in three.
Anthology of Helpmates. Part III
The third part of world champions A. and V. Semenenko's systematisation of helpmates in three.