rnbqk2r/1p2n3/2p3p1/p1b1pp1P/5P1P/P1P1PK1R/QP1B4/RN3BN1 w - - 0 18
FEN state: rnbqk2r/1p2n3/2p3p1/p1b1pp1P/5P1P/P1P1PK1R/QP1B4/RN3BN1 w - - 0 18 ; Best move: b2b4
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black queen at d8, black king at e8 and black rook at h8. Black pawn at b7 and black knight at e7. Black pawn at c6 and black pawn at g6. Black pawn at a5, black bishop at c5, black pawn at e5, black pawn at f5 and white pawn at h5. White pawn at f4 and white pawn at h4. White pawn at a3, white pawn at c3, white pawn at e3, white king at f3 and white rook at h3. White queen at a2, white pawn at b2 and white bishop at d2. White rook at a1, white knight at b1, white bishop at f1 and white knight at g1. Both players have exhausted their castles. Half move number is 0. Full move number is 18. White to move.