[Event "A. Selivanov-50, 2017, 1 prize"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "N1. Î. Pervakov"]
[Black "?"]
[Result "1/2-1/2"]
[SetUp "1"]
[FEN "7n/1BP4b/1n6/5P2/8/4K3/7p/4Nk2 w - - 0 1"]
[PlyCount "31"]
[EventDate "2017.??.??"]

{[#] Both pawns are detained, but the black pawn will cost white a piece
sooner or later...} 1. Nf3 $1 {To deal with a pawn it is necessary to oblige
her to turn into a queen!} h1=Q 2. Nd2+ Kg1 3. Bxh1 $1 {Difficult choice. But
to leave on a board a bishop - means to die:} (3. Nf3+ $2 Qxf3+ $1 4. Bxf3 Bxf5
5. Kf4 Bc2 $1 ({but not} 5... Bd7 $2 6. Bg4 $11) 6. Bb7 Ng6+ 7. Kg5 Ne7 $19)
3... Kxh1 4. Kf4 $3 ({Logical try} 4. Ne4 $2 Nd5+ (4... Bxf5 $2 5. Ng3+ $11) 5.
Kd4 Nxc7 6. Ke5 Ne8 $1 (6... Bg8 $2 7. Kf6 Ba2 8. Nd6 $1) 7. Ke6 Ng7+ $1 8. Kf6
Nxf5 $1 9. Ng5 Bg6 10. Ne6 Nd6 $1 (10... Nh6 11. Nd8 $1) 11. Kg7 Ndf7 $19 {,
and black pieces were located comfortably in the top right corner}) ({Other
moves of the king are easily disproved:} 4. Ke4 $2 Nf7 $19) ({or} 4. Kd4 $2
Bxf5 $19) 4... Nd5+ (4... Bg8 5. Ne4 Nd5+ 6. Ke5 Nxc7 7. Kf6 $11) (4... Nf7 5.
Ne4 $1 Nd5+ 6. Kg4 $1 Nxc7 7. Nf6 $11 {, and the bishop is caught}) 5. Ke5 $1 (
5. Kg5 $2 Nf7+ $1 $19) 5... Nxc7 6. Kf6 $1 ({It is senseless to attack a
knight c7:} 6. Kd6 $2 Nb5+ $1 7. Ke6 Bg8+ 8. Kf6 Ba2 $19) 6... Ne8+ 7. Ke7 {
Amusing route of the white king on e3-f4-e5-f6 as "snake"!} Ng7 8. Kf6 Nh5+ 9.
Kg5 $1 Ng3 10. Kf6 Nxf5 {Just a moment! We see the same position from logical
try with one more tempo for black (the knight there already stood on e4!). An,
no!} ({It was not succeeded to frighten white: after} 10... Bxf5 11. Nf1 $1 {
black remain with two useless knights.}) 11. Nf3 $3 {Here it, the sweet field
for a knight with a high, juicy grass in the form of three black pieces!} Bg6
$1 12. Ne5 Bh7 13. Nf3 Kg2 {And what else? It is necessary to go...} 14. Ng5
Bg6 15. Ne6 $1 {Oops! It was so pleasant to the black king in h1 corner (see
logical try 4.Ne4)! And here the poor king was enticed on g2...} Kf3 (15... Nd6
16. Nf4+ $1 $11 {, the fork trapped suddenly}) 16. Nf8 $1 {And the poor bishop
is caught!} 1/2-1/2

[Event "Olympic Ty, 2018, 1 prize"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "N2. O. Pervakov"]
[Black "?"]
[Result "1-0"]
[SetUp "1"]
[FEN "4R3/1r2P3/3r2P1/8/p4q2/1pQp1k1P/P6P/3RK3 w - - 0 1"]
[PlyCount "29"]
[EventDate "2018.??.??"]

{[#]} 1. Rd2 $1 ({Simple draw after} 1. Rxd3+ $2 Rxd3 2. Qxd3+ Qe3+ (2... Kg2
$11 {also is possible}) 3. Qxe3+ Kxe3 4. axb3 axb3 5. Rc8 Rxe7 6. Rb8 Kf4+ 7.
Kf2 Kg5 8. Rxb3 Kxg6 $11) 1... Rxe7+ $1 {Attracting the white rook on e7.} (
1... Qe3+ 2. Kf1 $18) (1... Re6+ 2. Kd1 $18) 2. Rxe7 Qh4+ 3. Kf1 $3 {It is
necessary to get rid of pawn h3!} ({Logical try-1:} 3. Kd1 $2 Qxe7 4. g7 (4.
axb3 Qe3 $1 $11) 4... Qg5 $1 5. Rxd3+ (5. Kc1 b2+ 6. Kb1 Qg1+ 7. Kxb2 a3+ $1 8.
Kxa3 Ra6+ 9. Kb2 Rb6+ $11) (5. Re2 bxa2 $1 6. Rxa2 Qg1+ 7. Qe1 Rg6 $11) 5...
Qe3 $1 6. Qc6+ $5 Kf2 $1 7. Qg2+ Kxg2 8. g8=Q+ Kxh2 $11 {and the pawn h3
prevents white to carry out conceived.}) 3... Qxh3+ 4. Ke1 (4. Kg1 $2 Rxg6+ 5.
Kh1 Qf1#) 4... Qh4+ 5. Kd1 Qxe7 6. g7 $1 {It is necessary to win a tempo.} ({
After} 6. Rxd3+ Qe3 $1 $19 {"the Maltese cross" conducts to a victory of black.
}) ({The mate waits white after} 6. Qc5 $2 Qe2+ $1 7. Rxe2 dxe2+ 8. Ke1 Rd1#)
6... Qg5 $1 7. Rxd3+ Qe3 $1 8. Qc6+ $3 {Correct "removal from a cross"!} ({
Logical try-2:} 8. Qf6+ $2 Rxf6 $1 9. Rxe3+ Kxe3 10. g8=Q Rf1# $1) 8... Kf2 $1
(8... Rxc6 9. Rxe3+ Kxe3 10. g8=Q $18) 9. Qg2+ $1 (9. Rxd6 $2 Qe1#) 9... Kxg2
10. g8=Q+ Kh3 $1 {Protection of black is based on win white rook d6 after
capture black rook.} ({So, badly} 10... Kh1 11. Qa8+ Kg1 12. Rxd6 $18) 11. Qh8+
$1 {And a problem of white - to force black to take also the second pawn "h".}
({Early} 11. Rxd6 $2 Qf3+ 12. Kc1 Qc3+ $11) (11. Qh7+ $2 Kg4 $1 12. h3+ Kg3 $1
13. Rxd6 Qf3+ $11) 11... Kg2 $1 (11... Kg4 12. h3+ $1 Kg3 13. Qe5+ $1 $18) 12.
Qg7+ $1 ({No progress after} 12. Qa8+ Kh3 $1 {, because} 13. Qh1 {is not check}
) 12... Kxh2 {It is necessary.} (12... Kh3 13. Rxd6 Qf3+ 14. Kc1 $1 Qf1+ 15.
Rd1 $1 Qc4+ {and white is not necessary the rook any more:} 16. Kb2 Qc2+ 17.
Ka3 Qxd1 18. Qg3# $1) 13. Qh8+ $1 {The pawn of h2 is destroyed, and white
realize the plan.} ({But not} 13. Qh7+ $2 Qh6 $11) ({or} 13. Rxd6 $2 Qf3+ 14.
Kc1 Qf1+ $1 15. Kb2 Qf2+ 16. Ka3 Qc5+ 17. Kxa4 Qxd6 $11) 13... Kg2 (13... Kg3
14. Qe5+ $1 $18) (13... Qh6 14. Qe5+ $1 $18) (13... Kg1 14. Rxd6 Qf3+ 15. Kc1
$1 Qf4+ 16. Rd2 $18) 14. Qa8+ $1 Kh3 ({The white king leaves easily from
checks after} 14... Kg3 15. Rxd6 Qg1+ 16. Kd2 Qf2+ 17. Kd3 Qc2+ 18. Kd4 Qd2+
19. Kc5 $1 $18) ({or} 14... Kh2 15. Rxd6 Qg1+ 16. Ke2 $1 Qg4+ 17. Qf3 $18) 15.
Qh1+ $1 {with the decisive check and the subsequent capture of the black rook.
The newborn white queen visited three corners of a board.} (15. Rxd6 $2 Qg1+
16. Kd2 Qh2+ $11) 1-0

[Event "EG-50, 2016, 1 prize"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "N3. O. Pervakov"]
[Black "?"]
[Result "1/2-1/2"]
[SetUp "1"]
[FEN "4K3/k3N3/p7/3p1N2/2r3b1/1R6/q2pn3/4BQ2 w - - 0 1"]
[PlyCount "20"]

{[#]} 1. Qf2+ $1 ({Try} 1. Bf2+ $2 Ka8 $1 2. Rb6 Qa4+ 3. Kd8 Bxf5 4. Nxf5 Nd4
$1 5. Bxd4 (5. Nxd4 d1=Q 6. Qxd1 Qxd1 7. Nc6 Rxc6 8. Rxc6 d4 $19) 5... d1=Q 6.
Qf4 (6. Qg2 Qxd4 $1 7. Nxd4 Qa5 $1 8. Ke8 Rc8+ 9. Kd7 Qxb6 10. Kxc8 Qxd4 $19)
6... Rc8+ $1 7. Kxc8 Qe8+ 8. Kc7 Qc2+ 9. Kd6 Qcc8 $1 10. Kxd5 Qg8+ 11. Ke4 Qc2+
12. Ke5 Qc7+ 13. Ke4 Qg2+ 14. Qf3 Qcc2+ 15. Ke3+ Qxf3+ 16. Kxf3 Qxf5+ $19) 1...
d4 $1 (1... Ka8 2. Rb8+ $1 Kxb8 3. Qb6+ $11) 2. Nc6+ $1 (2. Nxd4 $2 Bd7+ $1 3.
Kxd7 Rxd4+ 4. Ke8 Qxb3 5. Bxd2 Qb5+ 6. Kf7 Qc4+ 7. Kf8 Kb8 $19) 2... Rxc6 (2...
Ka8 $2 3. Rb8#) 3. Nxd4 Bd7+ $1 {Open counterplay} (3... Bh5+ $2 4. Ke7 Nxd4 5.
Qxd4+ Ka8 6. Qh8+ $18) (3... Nxd4 $2 4. Qf7+ $18) 4. Kxd7 (4. Ke7 $2 Nxd4 5.
Qxd4+ Ka8 6. Qh8+ Bc8 $19) 4... d1=Q ({After} 4... d1=R $5 {White build the
new battery:} 5. Qf7 $1 $11) 5. Bd2 $3 {The echo-sacrifice!} (5. Kxc6 $2 Nxd4+
6. Qxd4+ Qxd4 $19 {, and no stalemate - bishop on the board!}) (5. Qf7 $2 Qaxb3
$19) 5... Qaxd2 $1 6. Kxc6 Qh1+ ({Main} 6... Qh6+ 7. Ne6+ Nd4+ 8. Qxd4+ $1 Qxd4
9. Rb7+ Ka8 10. Rb8+ $1 Kxb8 $11 {The 1-st mirror ideal stalemate with pin
knight}) ({Main} 6... Q1c1+ 7. Nc2+ Nd4+ 8. Qxd4+ $1 Qxd4 9. Rb7+ Ka8 10. Rb8+
$1 Kxb8 $11 {The 2-nd mirror ideal stalemate with pin knight}) 7. Nf3+ Nd4+ (
7... Qd4 8. Rb7+ Ka8 9. Rb8+ $1 Kxb8 10. Qg3+ $1 $11) 8. Qxd4+ $1 Qxd4 9. Rb7+
Ka8 10. Rb8+ $1 Kxb8 $11 {And the 3-rd mirror ideal stalemate with pin knight!}
1/2-1/2

[Event "JPA-85 JT, 2017, 1 prize"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "N4. O. Pervakov"]
[Black "?"]
[Result "1/2-1/2"]
[SetUp "1"]
[FEN "4n2k/1p6/7K/1p4N1/4p3/6Rp/1P1qPn1P/7Q w - - 0 1"]
[PlyCount "35"]

{[#]} 1. Qe1 $1 {Look at c3 and h4 squares} Qd6+ (1... Qxe1 $2 2. Nf7#) 2. Ne6
$1 (2. Kh5 $2 Ng7+ 3. Kh4 Qh6#) 2... Qxe6+ 3. Rg6 Nf6 $1 (3... Ng4+ $2 4. Kg5
$1 Nef6 (4... Qe5+ 5. Kxg4 Kh7 6. Rb6 $1 $18) 5. Qh4+ Nh7+ 6. Qxh7+ Kxh7 7.
Rxe6 $18) 4. Qc3 $1 {Pin knight f6} (4. Qxf2 $2 Ng4+ 5. Kg5 Qxg6+ 6. Kxg6 Nxf2
$19) 4... N2g4+ $1 5. Rxg4 (5. Kg5 $2 Ne5 $1 {Unpin knight f6} 6. Rxf6 Qg4+ 7.
Kh6 Qh4#) 5... Qf5 $1 6. Rh4 (6. Rg5 $2 Qh7#) 6... b4 $1 {Black begin
counterplay. They want to close diagonal a1-d4 for white queen} 7. Qd4 b3 $1 (
7... e3 $2 8. b3 $18) 8. Qc3 $1 ({The 1-st logical try:} 8. e3 $6 {(play for
stalemate or perpetual check)} b6 $1 9. Qc3 b5 10. Qd4 b4 11. Qd8+ Ng8+ 12.
Qxg8+ Kxg8 13. Rg4+ $1 Kf7 14. Rg7+ Ke6 15. Rg6+ Kd5 $1 16. Rg5 Qxg5+ 17. Kxg5
Kc4 18. Kf4 Kd3 $19) 8... e3 $1 (8... b6 $2 9. Rxh3 $18) 9. Qd4 $1 ({The 2-nd
logical try:} 9. Qc4 $6 Ng8+ 10. Qxg8+ Kxg8 11. Rg4+ $1 Kf8 12. Rg8+ $1 Ke7 13.
Rg7+ Kd6 14. Rg6+ Kc7 15. Rg7+ Kb8 16. Rg8+ Ka7 $1 $19) 9... b6 $1 {Lose a
tempo} 10. Qc3 $1 ({The 3-rd logical try:} 10. Qd8+ $6 Ng8+ 11. Qxg8+ Kxg8 12.
Rg4+ $1 Kf7 13. Rg7+ Ke6 14. Rg6+ Kd7 15. Rg7+ Kc6 16. Rg6+ Kb7 17. Rg7+ Ka6 $1
$19) ({Try} 10. Rxh3 $2 Qxh3+ 11. Kg5 Qg2+ $1 12. Kf5 (12. Kxf6 Qg7+ $19) 12...
Qd5+ 13. Qxd5 Nxd5 14. Ke4 Nc3+ $1 $19) 10... b5 11. Qd4 b4 {White in
zugzwang? But...} 12. Qd8+ {(c4)} Ng8+ 13. Qxg8+ Kxg8 14. Rg4+ $1 Kf8 (14...
Qxg4 $11 {stalemate}) 15. Rg8+ $1 Ke7 (15... Kxg8 $11 {stalemate}) 16. Rg7+ Kd6
(16... Kf6 17. Rf7+ $1 Kxf7 $11 {stalemate}) 17. Rg6+ Ke7 18. Rg7+ {Perpetual
check or stalemate} 1/2-1/2

[Event "The Ural Problemist-25, 2018, 1-2 prize"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "N5. O. Pervakov"]
[Black "?"]
[Result "1-0"]
[SetUp "1"]
[FEN "3K2R1/3Pp3/2k5/8/3P4/7p/b1PR2p1/4r3 w - - 0 1"]
[PlyCount "33"]
[EventDate "2018.??.??"]

{[#] Pawn overlapping of diagonal a2-g8 arises - 1.d5.} 1. c4 $3 ({Logical try
} 1. d5+ $2 Bxd5 2. Rxd5 h2 3. Kc8 ({or} 3. Rg6+ e6 $1 4. Kc8 Ra1 {and so on})
3... Ra1 $1 4. Rg6+ e6 $1 5. Rd6+ (5. Rxe6+ Kxd5 6. Ra6 $5 Rxa6 7. d8=Q+ Ke4 $1
8. Qh4+ Kf3 $11) 5... Kc5 6. Rg5+ e5 7. Rd5+ (7. Rxe5+ Kxd6 8. Ra5 $5 Rxa5 9.
d8=Q+ Ke6 $1 10. Qg8+ Ke5 11. Qxg2 Rc5+ 12. Kd7 Rxc2 $11) 7... Kc4 8. Rg4+ e4
9. Rd4+ Kc3 10. Rg3+ e3 $1 (10... Kb2 $2 11. Rb4+ Kc1 12. d8=Q Ra8+ 13. Rb8
Rxb8+ 14. Kxb8 g1=Q 15. Qg5+ $18) 11. Rd3+ Kb2 $1 $11 {, and the black king
hid in a shadow of a pawn c2}) (1. Rg6+ $2 Re6 $1 $11) (1. Rdxg2 $2 hxg2 2.
Rxg2 Be6 3. Rg6 Kd5 $11) 1... Bxc4 ({Rook ending after} 1... g1=Q 2. Rxg1 Rxg1
3. Rxa2 Rg8+ 4. Kxe7 Kc7 5. c5 $18 {is easy win for white}) 2. d5+ ({The pin
of bishop does not lead to success:} 2. Rc2 $2 g1=Q 3. Rxg1 Rxg1 4. Rxc4+ Kd5
$1 5. Rc5+ Kxd4 6. Rc1 $5 Rxc1 7. Ke8 h2 8. d8=Q+ Ke4 $1 9. Qxe7+ Kf3 $11) 2...
Bxd5 (2... Kc5 3. Kc7 h2 4. Rgxg2 h1=Q 5. d8=Q $18) 3. Rxd5 $1 (3. Rg6+ $2 Re6
$19) (3. Ke8 $2 g1=Q $11) 3... h2 $1 {The best chance} (3... Kxd5 4. Ke8 g1=Q
5. d8=Q+ Ke4 6. Rxg1 Rxg1 7. Qd2 Kf3 8. Qh2 $1 $18) (3... g1=Q 4. Rxg1 Rxg1 5.
Rd2 Rg2 6. Rd1 $1 $18) 4. Kc8 $1 ({Early} 4. Rg6+ $2 Kxd5 $1 5. Ke8 g1=Q 6.
d8=Q+ Ke5 $19) 4... Ra1 $1 ({Hopelessly} 4... g1=Q 5. d8=Q Qxg8 6. Qxg8 h1=Q 7.
Rf5 e5 8. Qc4+ $18) 5. Rg6+ e6 $1 6. Rd6+ $1 (6. Rxe6+ $2 Kxd5 7. Ra6 Rxa6 8.
d8=Q+ Ke4 $11) 6... Kc5 7. Rg5+ e5 8. Rd5+ ({It is not possible to mate the
black king after} 8. Rxg2 $2 Ra8+ $1 9. Kc7 h1=Q 10. Rc2+ Kb4 11. Rb6+ Ka3 $11)
8... Kc4 (8... Kc6 9. Rg6+ Kxd5 10. d8=Q+ Ke4 11. Qh4+ $18) (8... Kxd5 9. d8=Q+
Ke4 10. Qd6 $18) 9. Rg4+ e4 10. Rd4+ (10. Rxg2 $2 h1=Q 11. Rc2+ Kb3 $1 $11)
10... Kc3 (10... Kc5 11. Rg5+ Kxd4 12. d8=Q+ Ke3 13. Qb6+ $18) 11. Rg3+ e3 12.
Rd3+ $1 {For the 4-th time repeating a step of the systematic movement} Kc4 $1
{Alas, not to hide any more - a white pawn c2 is not on a board!} (12... Kc2
13. Rxg2+ $18) 13. Rg4+ Kxd3 14. d8=Q+ Ke2 15. Rxg2+ Kf1 16. Qd5 $1 (16. Qf6+
$2 Kxg2 17. Qb2+ e2 $11) (16. Rxh2 $2 Ra8+ $11) 16... h1=Q 17. Qf3+ {Logical
dumping of a white pawn precedes the systematic movement of four pieces.} 1-0

[Event "JT Y. Afek-64, 2016, 2 prize"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "N6. O. Pervakov"]
[Black "?"]
[Result "1-0"]
[SetUp "1"]
[FEN "1R6/8/6N1/8/3b1K2/3P1p1k/8/3b4 w - - 0 1"]
[PlyCount "15"]

{[#]} 1. Rb1 $1 Be2 $1 (1... Bc2 2. Rf1 f2 (2... Kh2 3. Rxf3 Bd1 4. Nh4 $1 $18)
3. Kf3 Kh2 4. Ne5 $1 $18) 2. Nh4 $3 (2. Ke4 $2 Kg3 3. Nf4 (3. Kxd4 f2 $11) 3...
Bc3 $1 4. Rg1+ Kh2 5. Rg4 (5. Rg6 Bd2 6. Rg4 Bxf4 7. Rxf4 Kg3 8. Ke3 Bxd3 $11)
5... Bd1 6. d4 Be1 7. Ke3 f2 8. Rg2+ Kh1 9. Rxf2 Bxf2+ 10. Kxf2 Bb3 $11) 2...
Be5+ $1 (2... Bxd3 3. Rh1# (3. Rd1 f2 4. Rh1# {- lost time})) 3. Kxe5 Bxd3 $1 (
3... f2 4. Rh1+ Kg4 5. Nf5 $1 Bxd3 6. Ne3+ Kf3 7. Kd4 $18) (3... Kxh4 4. Kf4 $1
Kh3 5. Ke3 $18) 4. Rd1 $1 ({Thematic try} 4. Rh1+ $2 Kg3 $1 5. Kd4 Bc2 $1 6.
Ke3 f2 7. Nf3 Be4 $3 {The second bishop's sacrifice!} (7... Bd3 $2 8. Nd2 Kg2
9. Rh5 $1 $18) 8. Kxe4 Kg2 9. Rh2+ Kg3 10. Rh1 Kg2 {Positional draw} 11. Kf4 $5
Kxh1 $11 (11... f1=Q $4 12. Rh2#)) (4. Rb3 $2 Bc2 $1 (4... Bc4 $2 5. Rxf3+ Kxh4
6. Rf4+ $18) 5. Rc3 Kxh4 6. Rxc2 Kg3 $11) 4... Be2 $1 (4... Bc2 5. Rc1 Kxh4 6.
Kf4 $18) (4... Kxh4 5. Rxd3 f2 6. Rf3 $18) 5. Rh1+ Kg4 $1 6. Nf5 $1 f2 7. Ne3+
Kf3 (7... Kg3 8. Ra1 Kf3 9. Kd4 Bb5 10. Rb1 Ba6 11. Rb6 Be2 12. Rf6+ $18) 8.
Rh3# $1 {Ideal mate with two active blockings. Echo with 3.Rh1#, but in the
middle of the board.} (8. Kd4 $2 f1=Q 9. Nxf1 Kg2 $11) 1-0

