Prevent Promotion Challenge

Can you win this with white ?

White to Mate in 2 - Composition by Udo Wilk

White to Mate in 3 - Composition by William Meredith

Can you win this with white ?

Who wins ?

White to Mate in 2 - Composition by Сергей Юрьевич Румянцев

White to Mate in 2 - Composition by Herbert Siegfried Oskar Ahues

Hikaru sacrificed queen but why ?

White to Mate in 2 - Composition by Alois Johandl

White to Mate in 2 - Composition by Allard Pieter Eerkes

White to Mate in 2 - Composition by Arthur Christopher Reeves

White to Mate in 2 - Composition by Tivadar Kardos

White to Mate in 2 - Composition by Teodors Briedis

White mates in 2 !

White to Mate in 2 - Composition by Adolf Ringier

White to Mate in 3 - Composition by Emil Palkoska

White to Mate in 2 - Composition by Philippe Robert

White to play and win

White to Mate in 2 - Composition by Lars Aksglæde Larsen