Queen against queen is lesson 4 of 6 in Endgame 5: Queen endings, an endgame course suited to players rated around 1400 (club players). In queen endings one check can decide: look for skewers that win the enemy queen, or a mating net. It has 6 interactive exercises: 6 calculated lines from real positions. You play every move on a board and get feedback straight away. The lesson is free.
What you practise
White to move and win. (3 positions)
Black to move and win. (3 positions)
Worked examples
White to move and win. 1.Qe1+ Kd4 2.Qd2+ Kc4 3.Qxd8. Your queen won the enemy queen or mated. This is a won endgame (checked with endgame tables). After Kg3 the win would be gone.
Black to move and win. 1...Qh1+ 2.Ke2 Qg2+ 3.Ke3 Qxb2. Your queen won the enemy queen or mated. This is a won endgame (checked with endgame tables). After Kc5 the win would be gone.