Editorial board of international web project "SuperProblem" (http://superproblem.ru/index-en.html) announces a quick composing thematic tourney for selfmates in 2-5 moves.
(2) Posted by Frank Richter [Sunday, Feb 13, 2022 17:03]
"... different Pawn batteries" - which batteries are considered as "different" here?
On different lines only?
On the same line, but with different pieces?
On the same line with one or two same pieces, but on different squares?
Please clarify, thank you.