Section B2 – Min Draw
1.Ra4!
Main B: 1…Be7
( Main A: 1…Nf3+ 2.Kg3 Bb2 3.e6! A1: 3…Kxe6
( A2: 3…Be5+ 4.Kf2 Kxe6 5.Ra6+ Bd6 6.Ra1 Bc5+ 7.Kg3 Ng1 8.Kh2! King’s fork! 8…Be4 9.Rxg1 Bxg1+ 10.Kxg1 =, quiet )
4.Ra6+ Kf7! 5.Rh6! Be5+ 6.Kf2 Nh2
( 6…Bh2 7.Rxh2 Nxh2 8.Kg1 )
7.Kg1! King’s fork! 7…Be4 8.Rxh2 Bxh2+ 9.Kxh2 =, quiet )
2.Ra7! Nf3+ 3.Kg3 B2: 3…Bb4
( B1: 3…Bh4+ 4.Kf4! Bg2 5.e6 Kxe6 6.Ra2 Bh1
( 6…Ne1 7.Kg4! Bf6 8.Re2+ =, quiet )
7.Ra1! Ne1 8.Ra6+ Kd5
( 8…Kf7 9.Rh6! )
9.Ra5+!
( 9.Rh6? Nd3+! 10.Kg4
( 10.Ke3 Bg5+ )
10…Be1! 11.Rxh1 Nf2+ 12.Kf3 Nxh1 -+ )
9…Kd4 10.Ra4+ Kc3 11.Ra3+ Kd2 12.Rh3 Nd3+ 13.Kf5 Be4+ 14.Kxe4 Nf2+ 15.Kf3
( 15.Kf4 )
( 15.Kf5 )
15…Nxh3 16.Kg4 =, quiet King’s fork! )
4.e6!
( 4.Ra1? Ne1! 5.Kf2 Nd3+ 6.Ke3 Be4 7.Rd1 Kc4 8.Kxe4 Nf2+ -+ )
4…Kxe6
( 4…Bd6+ 5.Kf2! Bc5+
( 5…Ne5 6.e7 Ng4+ 7.Kg1 =, quiet )
6.Kg3 Nd4
( 6…Bxa7 7.e7 =, quiet )
7.e7 Nf5+ 8.Kh2 Nxe7 9.Rxe7 =, quiet )
5.Ra1 Be1+
( 5…Ne1 6.Kf2 Nd3+ 7.Ke3 Ne1 8.Kf2 =, quiet Positional draw. )
6.Kf4 B2.1: 6…Bg2
( B2.2: 6…Kf6 7.Ke3 Bg2
( 7…Ke5 8.Rd1 Bg2 9.Rxe1 )
8.Rxe1 Nxe1 9.Kf2 =, quiet King’s fork! )
7.Ra2!
( 7.Ra3? Ne5! 8.Re3 Double attack with pinning of the knight. 8…Bd2! -+ Pinning
of the pinning piece! )
7…Nd2 8.Ra1! Bf2 9.Ra2 Ne4 10.Rxf2
( Or 10.Re2 Kd5 11.Rxf2 )
10…Nxf2 11.Kg3 =, quiet King’s fork! The main theme of the
study is cascading recursion. (See: Problemist of Ukraine >=4(38), 2013) The
formative factor of the recursion is the King’s Fork. The five solution
variants form a recursive structure, and all of them culminate in the King’s
Fork. 1/2-1/2