1r2k2r/1p1bqp2/2ppp1pp/p1PP3P/1P1b4/2N1n2R/P2KP1Q1/R1B2BN1 w k - 4 20
FEN state: 1r2k2r/1p1bqp2/2ppp1pp/p1PP3P/1P1b4/2N1n2R/P2KP1Q1/R1B2BN1 w k - 4 20 ; Best move: h3e3
The current state of the chess board is: Black rook at b8, black king at e8 and black rook at h8. Black pawn at b7, black bishop at d7, black queen at e7 and black pawn at f7. Black pawn at c6, black pawn at d6, black pawn at e6, black pawn at g6 and black pawn at h6. Black pawn at a5, white pawn at c5, white pawn at d5 and white pawn at h5. White pawn at b4 and black bishop at d4. White knight at c3, black knight at e3 and white rook at h3. White pawn at a2, white king at d2, white pawn at e2 and white queen at g2. White rook at a1, white bishop at c1, white bishop at f1 and white knight at g1. Black kingside is the only castle move available. Half move number is 4. Full move number is 20. White to move.