单后对单车是四子残局中比较复杂的，因为弱方的车有多种反击手段，强方要想取胜并不容易，现转载单后对单车的四种局面，以飨棋友。

http://s2/middle/4c66d211g86d4d9669e31&690

Queen vs. rook - Position 1
Heavy piece endgames
[Mating]
1...Rh7 [1...Rb8 2.Qa5#;
1...Ka6 2.Qc8;
1...Rb4 2.Qa5+;
1...Rb2 2.Qd4+;
1...Rg7 2.Qd4+;
1...Rb3 2.Qd4+ Kb8 3.Qf4+ Ka7 4.Qa4+;
1...Rf7 2.Qd4+ Kb8 3.Qb2+ Ka8 4.Qa2+;
1...Rb1 2.Qd4+ Kb8 3.Qh8+ Ka7 4.Qh7+]
2.Qd4+ Kb8 3.Qe5+ Ka7 4.Qa1+ Kb8 5.Qb1+ 1–0

http://s2/middle/4c66d211g86d4d9d82591&690
Queen vs. rook - Position 2
Heavy piece endgames
[Mating]
1.Qf6+ Ke8 2.Qh8+ [2.Ke6? Rd6+!=]
2...Kf7 3.Qc8 Ke7 [3...Rd3 4.Qf5+; 3...Rd2 4.Qb7+ Ke8 5.Qb5+ Kf7 6.Qc4+ Ke8 7.Ke6+-; 3...Rd1 4.Qc4+ Ke7 5.Qb4+ The queen forces the enemy king to retreat and simultaneously prevents the rook giving  check from behind. 5...Kd8 6.Ke6+-; 3...Re7+ 4.Kf5 Kg7 (4...Re8 5.Qc4+ Ke7 6.Qc7+ Kf8 7.Kf6+-) 5.Qd8 Rf7+ 6.Kg5 Kh7 7.Qd4 Rg7+ 8.Kf6 Kg8 9.Qd8+ Kh7 10.Qe8+- We are already familiar with this position.]
4.Qg8 Rc7 [4...Rd1 5.Qg5+ Kf8 6.Qf4+ Ke7 7.Qh4+ Kf8 8.Ke6+- Black is either mate or loses the rook.]
5.Qg7+ Kd8 6.Qf8+ Kd7 7.Kd5 Rb7 [7...Rc1 8.Qf5+ Ke8 9.Qh5+ Kd7 10.Qg4+ Ke8 11.Kd6 Mate or loss of rook cannot be prevented.]
8.Qf7+ Kc8 9.Qe8+ Kc7 10.Kc5 Ra7 11.Qe7+ Kb8 12.Qd8+ Kb7 13.Kb5 Ra8 14.Qd7+ Kb8 15.Kb6 Black has no satisfactory answer to the mate threat. 1–0

http://s4/middle/4c66d211g86d4da2e4263&690
Queen vs. rook - Position 3    1/2
Heavy piece endgames
[Stalemate trick]
1...Rg7+ 2.Kf5 [2.Kf6 Rg6+!=]
2...Rf7+ 3.Kg6 Rg7+ 4.Kh6 Rh7+! The white king finds no shelter from checks. ½–½

http://s7/middle/4c66d211g86d4da9ab746&690

Queen vs. rook - Position 4   1/2
Heavy piece endgames
[Stalemate trick]
Black has wily moved to the CORNER and White has fallen into the TRAP by playing  £f7.
1...Rg3+ 2.Kd4 Rg4+ 3.Ke5 Rg5+ The rook has to stay in the g-file. [3...Re4+? 4.Kd6 Rd4+ 5.Kc5+-] 4.Kd6 [4.Kf4 Rg4+!]
4...Rg6+! Perpetual check, stalemate or capture of the queen. ½–½