4k1nr/pbrp1p1p/2nq1bN1/1P4p1/2pP2P1/2P1Bp1P/1P2P1B1/RQ2K2R w KQk - 2 21
FEN state: 4k1nr/pbrp1p1p/2nq1bN1/1P4p1/2pP2P1/2P1Bp1P/1P2P1B1/RQ2K2R w KQk - 2 21 ; Best move: g6h8
The current state of the chess board is: Black king at e8, black knight at g8 and black rook at h8. Black pawn at a7, black bishop at b7, black rook at c7, black pawn at d7, black pawn at f7 and black pawn at h7. Black knight at c6, black queen at d6, black bishop at f6 and white knight at g6. White pawn at b5 and black pawn at g5. Black pawn at c4, white pawn at d4 and white pawn at g4. White pawn at c3, white bishop at e3, black pawn at f3 and white pawn at h3. White pawn at b2, white pawn at e2 and white bishop at g2. White rook at a1, white queen at b1, white king at e1 and white rook at h1. White kingside, white queenside and black kingside castles are available. Half move number is 2. Full move number is 21. White to move.