2 | Pawns can promote into an additional enemy king.
5 Pawns have the option to promote into an enemy king on the two last ranks,
6 in addition to their usual moves.
8 p This allows more winning tactics: double check on two kings for example.
10 figure.diagram-container
12 | fen:2kr1bnr/pbq1pppp/1pnpP3/2p5/2B3Q1/2N2N2/PPPP1PPP/R1B1K2R:
14 | fen:2kr1bnr/pbq1pkpp/1pnp4/2p5/2B3Q1/2N2N2/PPPP1PPP/R1B1K2R:
15 figcaption Before and after 1.exf7+. Not checkmate yet: 1...e6. Then 2.Qxe6#
18 | This variant is based on
19 a(href="https://www.chessvariants.com/play/erf/Kingmake.html")
21 | from chessvariants.com, invented by Tony Paletta (2001).