Checkmate in an Infinite Number of Moves

When discussing with Ralph Betza about his Funny Notation , I thought about the following problem

Let's imagine an infinite board extended both sides, but bound in the column direction. In this Board, Black has King, Pawn, and Wazir, and White has King and a Wazir with Alfil capture (WcA).


                 Black
...  a   b   c   d   e   f   g   h   9  10 11 ...
   +---+---+---+---+---+---+---+---+  
 8 |   |   |   |   | w |   |   |   | 8
   +---+---+---+---+---+---+---+---+  
 7 |   |   |   |   |   |   |   |   | 7
   +---+---+---+---+---+---+---+---+       The board extends infinitely
 6 |   |   |   |   |   |WcA|   |   | 6     to both sides!
   +---+---+---+---+---+---+---+---+  
 5 |   |   |   |   |   |   |   |   | 5
   +---+---+---+---+---+---+---+---+  
 4 |   |   |   |   |   |   |   |   | 4
   +---+---+---+---+---+---+---+---+  
 3 |   |   | k |   |   |   |   |   | 3
   +---+---+---+---+---+---+---+---+  
 2 |   | p |   |   |   |   |   |   | 2
   +---+---+---+---+---+---+---+---+  
 1 |   | K |   |   |   |   |   |   | 1
   +---+---+---+---+---+---+---+---+
...  a   b   c   d   e   f   g   h   9  10 11 ...
		 White

Now, the problem is: Black to play and checkmate in w + 15 moves , where w is the first transfinite ordinal.

Anyone? :-)


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