N°21- Sergey Osintsev (Russia)

Section B2 – Min Draw

1.Nf6+ Ke3 2.g8=Q Kf2 3.Ng4+!
( Thematic try 3.Ne4+? Rxe4 4.Qf7+
( 4.Qf8+ Kg3! 5.Qc5 Position A1 with bRe4 – there is a move 5…Re1+ 6.Kc2 g1=Q -+ )
4…Kg3! 5.Qb3+ Kh4! 6.Qd1
( 6.Qg8 Re1+ -+ )
6…h2 7.Qd8+ Kg4! 8.Qc8+ Kf4 9.Qc7+ Kf3 10.Qf7+ Ke3 11.Qa7+ Ke2 12.Qa6+ Kf2 13.Qb6+ Kf1 14.Qf6+ Kg1 15.Qb6+ Kh1 -+ )
3…Rxg4 4.Qf8+!
( 4.Qxg4? g1=Q+ -+ )
( Thematic try 4.Qf7+? Kg3! 5.Qa7 Kh2 6.Qf2 Kh1 7.Qf3 Rg3! 8.Qd5 Kh2 9.Qd2 Position B1 with bRg3 9…Rf3 10.Qe2 Rf4 11.Ka2 Kh1 -+ )
4…Kg3 5.Qc5!
Position A with bRg4
( 5.Qa3+? Kh2 6.Qb2 Rb4 -+ )
( Thematic try 5.Qd6+? Rf4! 6.Qd3+ Kh2 7.Qd2 Kh1 8.Qd5
( 8.Qxf4 g1=Q+ 9.Kc2 Qh2+ -+ )
8…Rf2 9.Kc1 h2 10.Kd1 Position C1 with bRf2 10…Kg1 -+ )
5…Kh2
( 5…Rb4+!? 6.Ka2! =, quiet )
6.Qc2!
( Thematic try 6.Qf2? )
6…Rc4! 7.Qd2!
Position B with bRc4
( 7.Qb2? Rb4 -+ )
7…Re4 8.Qc2
( 8.Qf2? Kh1 9.Qf3 Re3! -+ )
8…Rc4 9.Qd2 Rd4! 10.Qc2! Kh1 11.Qc6 Rc4! 12.Qd5!
The Queen must not allow the Rook to move to the third rank.
( Thematic try 12.Qf3? Rc3! 13.Qe4 Re3! 14.Qd5 Kh2 15.Qd2
( or 15.Qd6+ Rg3 16.Qd2 Rf3! 17.Qe2 Rf4! -+ )
15…Rf3! 16.Qe2 Position D1 with bRf3 – The Queen is deprived of access to the long diagonal 16…Rf4! -+ )
( 12.Qa8? Rf4 13.Kb2 Kh2 14.Qb8 g1=Q 15.Qxf4+ Qg3 -+ )
( 12.Qb7? Rb4+! -+ )
12…Rd4! 13.Qc6 Rd6! 14.Qe4 Re6! 15.Qd5
( Thematic try 15.Qa8? Rb6+! 16.Kc1 Kh2 17.Qa2 Rc6+! 18.Kd1 Rf6! 19.Qd2 Rf3! The Rook moved to the third rank. 20.Qd6+ Kh1 21.Ke2 Rc3!!
( 21…g1=Q? 22.Kxf3 Qg2+ 23.Ke3 =, quiet )
22.Qd5 Kh2 23.Qe5+ Rg3 -+ )
15…Kh2
( 15…Re2 16.Kc1! Rf2 17.Kd1! h2 18.Ke1! =, quiet )
16.Qd2!
( 16.Qxe6? g1=Q+ -+ )
16…Kh1 17.Qd5 Re5!
( 17…Re2 18.Kc1 h2 19.Kd1 Position C with bRe2 – Black Rook under attack 19…Rf2 20.Ke1 Kg1 21.Qd4 =, quiet
( 21.Qc5 )
)
18.Qc6 Kh2 19.Qc2 Rc5! 20.Qe2!
Position D with bRc5 – The Rook cannot deprive the Queen of access to the long diagonal.
( 20.Qf2? Kh1 21.Qf3 Rc3 -+ )
20…Kh1 21.Qe4 Re5! 22.Qc6 Kh2 23.Qc2 Kh1 24.Qc6
Positional draw.
24…Rb5+! 25.Ka2! =, quiet
( 25.Kc2? Rc5+! -+ )
( 25.Ka1? Rc5! 26.Qf3 Rc3 27.Qb7 Rc2 -+ )
( 25.Qxb5? g1=Q+ 26.Ka2 h2 -+ )
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