Section B1 – Min Win
1.Rf6 !
( 1.Kg7 ? Qa1+ ! 2.Kh7 =
( 2.Rf6 ?? Qa7+ -+ )
)
1…Qc3
( 1…Qa1 2.Qe2+ Bg4 3.Qe7 Kxh4 4.Kh7 Qb1+ 5.Rg6+ Kh3 6.Qe3+ +- )
( 1…Qe4 2.Qb8 +- )
2.Kg7 !
( {try} 2.Qf4 ? Qc8+ 3.Rf8 Qc3+ 4.Kh7 Bg8+ !! 5.Kxg8 Qg7+ ! 6.Kxg7 {
stalemate} )
( 2.Qe2+ ? Bg4 3.Qe7 Kxh4 = )
2…Qd4
( {main} 2…Bg4 3.Qc2 !! {echo sacrifice}
( {thematic try} 3.Qg3 ?! Qd4 !
( 3…Qxg3 ? 4.Rh6# )
4.Qd3 ! Qa7+ !
( 4…Qxd3 ? 5.Rh6# )
5.Rf7 Qa1+ 6.Kg8 Qa8+ = )
3…Qxc2 4.Rh6# )
( 2…Bb3 3.Qf4 +- )
3.Qe2+ Bg4 4.Qe4 !!
{the point}
( {thematic try} 4.Qd3 ?! Qa7+ !
( 4…Qxd3 ? 5.Rh6# )
5.Rf7 Qa1+ 6.Kg8 Qa8+ = )
( 4.Qf2 ? Qd7+ = )
4…Qxe4
( 4…Qa7+ 5.Rf7 Qa1+ 6.Kg8 {/Kf8+-} )
5.Rh6#
{mate with self block on g4; inspired by the game Keymer –
Hovhannisyan, FIDE Grand Swiss 2025, round 6, 111.Qf3+- (111.Qc6! Qxc6
112.Rh7# was possible)}
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