1.g3+ [ 1.g4? h3 2.g5 Kxg5 3.Kf3 Kf5 4.Kf2 Kf4 5.Kf1 Kf3 6.Ke1 Be5 7.Kf1 h2 and wins] 1...hxg3+ Who would have thought that White would transform the black h-pawn, which is normally a guarantee for the "wrong bishop" draw, into a dangerous, protected g-pawn. 2.Kg2 Bg1 [ 2...Kg4 3.Kh1 Kf4 4.Kg2 ] 3.Kxg1 Kf3 4.Kf1 g2+ 5.Kg1 Kg3 stalemate 1/2-1/2
1.Kg3 h5 2.e4 Kg1 3.e5 dxe5 1/2-1/2
1.Re1 g2+ 2.Kf2+ g1Q+ [ 2...g1R 3.Rf1 Rxf1+ 4.Kxf1 Black is stalemated; 2...g1B+ 3.Kf3 Black is stalemated; 2...g1N 3.Re3 ( 3.Rd1 This was the original solution given by the author, with Black being stalemated, symmetrically with the other underpromotions. But white rook moves along the e-file actually win.) 3...Ne2 ( 3...Nf3 4.Kxf3 Kg1 5.Re1# ) 4.Re8 Ng1 5.Kg3 Ne2+ ( 5...Nf3 6.Kxf3 Kg1 7.Re1# ) 6.Rxe2 Kg1 7.Re1# ] 3.Kf3 Qxe1 White is stalemated 1/2-1/2
1.g7 Re1+ [ 1...Re8? 2.Bh7 and Black must give the rook for the g-pawn] 2.Bd1! [ 2.Ka2? Be5 threatening 3...Ra1# 3.Bb1 Bxg7 4.g6 Rd1 5.Be4 Ra1# ] 2...Re8 [ 2...Rxd1+? 3.Kc2 and the black bishop prevents the rook from guarding the promotion square g8. White gets a queen and wins.] 3.Bh5 Rg8 4.Bf7 Rxg7 5.g6! and the rook is caught in a cage from which it will never be able to escape. 1/2-1/2
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