[Event "2 queens chess: Staircase checkmate with 2 queens"]
[Site "https://lichess.org/study/cdQoeQWD/NuC4u1IL"]
[Result "*"]
[Variant "Standard"]
[ECO "?"]
[Opening "?"]
[Annotator "https://lichess.org/@/realhercules"]
[FEN "8/8/8/8/8/5k2/1Q6/Q6K w - - 0 1"]
[SetUp "1"]
[UTCDate "2022.10.16"]
[UTCTime "22:19:42"]
[Source "https://lichess.org/study/cdQoeQWD/NuC4u1IL"]
[Orientation "white"]
{ [%csl Gh2,Ba3][%cal Gb2h2,Ba1a3] }
1. Qaa3+ Ke4 2. Qbb4+ Kd5 3. Qaa5+ Ke6 4. Qbb6+ Kf7 5. Qaa7+ Kg8 6. Qbb8# { [%csl Gb8][%cal Gb6b8] } *