Chess Puzzle Series: Puzzle #1) Fight for a draw

Welcome to chess puzzle series! This is the new series(and also my first posts) that has some interesting positions that were featured in the game.(or a possible line.)

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Puzzle #1. Fight for a Draw(topic: stalemate, sacrifice)

White is down a lot of material, but can draw this game.

First move: a8 = Q+(!)

White's only move in this position is to push the A pawn. Since you cannot move the other pieces, white's goal is to sacrifice the a7 and b6 pawn.

Black has Kxa8 and Kxa6 avaliable. Let's look at Kxa8 first.

if the bishop or king takes it, the game ends immediately. Kb8 also blocks the pawn. If the oppoment plays Ka7 than white can promote(b8 = Q+) and if black plays Ka6, Qa7+ forces the king to take and draw.

Kxa6

You can end the game by Qa7+. The tactics are written above.