Multiple pawn promotions

In the (first prize awarded) Miniature of Abdurahmanovic we see the theme multiple promotions during the four phases of the trial game, and also the theme X-flights after the key.

Theme Multiple pawn Promotions (German: allumwandlung, AUW) : The solution contains pawn promotions to all kind of pieces. We have quadruple promotion, to queen, rook, bishop, knight.

Theme X-flights : The king can escape moving diagonally (northeast, northwest, southwest, southeast).

	(Problem 15) Fadil Abdurahmanovic, First Prize "Yugoslav Republic Tourney", 1957 White plays and mates in 2 moves #2 (6+1)
[5QKB/2P5/8/3k4/8/1R4S1/8/8]

Let us try to promote the pawn:
First Phase : Try 1 c8=Q? (not good, because black is in stalemate!)
Second Phase : Try 1 c8=R? Ke6!
Third Phase : Try 1 c8=B? Kc6!
Fourth Phase : Try 1 c8=S? Kc4!
Last Phase : Key 1 Se4!
Suddenly the knight is sacrificed. The black king has now one more flight, a total of four flights arranged in the shape of the letter X. But black is in “zugzwang”, that is, whatever he plays leads to a lost position.
1...Ke6 2 Qf7#
1...Kc6 2 Qd6#
1...Kc4 2 Qf7#
1...Kxe4 2 Qf3#

In the problem-16, by Millour and Kerhuel, we see the X-flights and the multiple promotion of a pawn in the variations of the actual play.

	(Problem 16) R. V. Millour & M. Kerhuel, First Prize, “Europe Echecs”, 1966 White plays and mates in 3 moves #3 (9+7)
[3sR3/3s4/2P1P3/4kBp1/S2S2p1/PQ4p1/6p1/6K1]

Key: 1 e7!
If black moves the knight of the eighth row,
1...S8~ 2 Qe6+ and 3 Qe4#
If black moves the knight of the seventh row,
1...S7~ 2 exd8=Q+ and 3 Qe3#
There are also the X-flights of the king,
1...Kf4 2 exd8=S ( > 3 Qe3#) Se5 3 Se6#
1...Kf6 2 exd8=Q+ Kg7 3 Qxg5#
1...Kd6 2 exd8=R Kc7 3 Rxd7#
1...Kxd4 2 exd8=B ( > 3 Re4#) Se5 3 Bb6#

Could black use multiple promotions as defending mechanism? Yes!
For the defensive promotions Q R B S of the black, could white make respectively promotions Q R B S to continue his attack? Yes!
We will see that later, when we will describe the Babson task.