[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] } *