Editing Cross-check (chess) (section)

===Anderson problem, 1919===
{{Chess diagram
| tright
|G.F. Anderson, 1919
|  |  |  |  |  |  |  | 
|  |  |kl|  |ql|pd|  |bd
|  |  |pd|  |  |  |  | 
|  |kd|  |  |  |  |  | 
|  |  |  |  |  |  |  | 
|rl|bl|pd|  |  |  |rd| 
|  |  |  |  |  |  |  | 
|  |rl|  |  |  |  |  | 
|}}

Cross-checks are relatively infrequent in actual play, but are popular in [[chess problem]]s since they make for a relatively unobvious solution. In the problem shown to the right, White is to move and mate in two moves against any defence. It is by [[Gerald Frank Anderson|G.F. Anderson]] and was first published in ''Il Secolo'' in 1919. The [[chess problem terminology#K|key]] 1.Kd6, threatening 2.Qb7#, gives the black king two [[flight square]]s, and two of the variations exploit these: 1...Kb6 2.Bc2# and 1...Kb4 2.Kxc6#. The other two defences exploit the fact that the key exposes the white king to checks, and are answered by cross-checks: 1...Rg6+ 2.Be6# and 1...Rd3+ 2.Bd5#.
{{clear}}