=== Chess Short #15 === Format: countdown_puzzle Source: Lichess puzzle 0OSNJ (rating 1800) Pre-setup FEN: 5R2/8/2r3p1/5P2/2r1p1p1/p1P1Pk1p/PnRK3P/8 b - - 0 44 Puzzle FEN (after setup move): 5R2/8/2r5/5p2/2r1p1p1/p1P1Pk1p/PnRK3P/8 w - - 0 45 Setup move (opponent): gxf5 (g6f5) Solver plays: White Themes: discoveredAttack discoveredCheck endgame long mate mateIn3 Solver moves (SAN): Rxf5+ Ke1+ Rf1# Full continuation (SAN): Rxf5+ Kg2 Ke1+ Kh1 Rf1# Full continuation (UCI): f8f5 f3g2 d2e1 g2h1 f5f1 PGN: 45. Rxf5+ Kg2 46. Ke1+ Kh1 47. Rf1# Lichess analysis: https://lichess.org/analysis/5R2%2F8%2F2r5%2F5p2%2F2r1p1p1%2Fp1P1Pk1p%2FPnRK3P%2F8%20w%20-%20-%200%2045 Lichess source: https://lichess.org/V7XWKtyA/black#88 Duration: 20s --- TITLE --- White to Move: Mate In 3 • Rating 1800 #shorts --- DESCRIPTION --- Mate In 3 puzzle, Lichess rating 1800. White to move — deliver mate in 3. Solution: 45. Rxf5+ Kg2 46. Ke1+ Kh1 47. Rf1# Try it yourself: https://lichess.org/analysis/5R2%2F8%2F2r5%2F5p2%2F2r1p1p1%2Fp1P1Pk1p%2FPnRK3P%2F8%20w%20-%20-%200%2045 #chessshorts #chess #chesstactics #chesscommunity #chessbrain #chesspuzzle #chessquiz #puzzletime --- THUMBNAIL --- short_0015_thumb.jpg --- SUGGESTED SCHEDULE --- 2026-04-20 17:00 (local machine time) Post to: @chessinsightsquest