[Event "Hlinka 65 JT, 1.-3.prize"]
[Site "?"]
[Date "2019.??.??"]
[Round "?"]
[White "Østmoe, Geir Sune Tallaksen"]
[Black "Draw"]
[Result "1/2-1/2"]
[SetUp "1"]
[FEN "r5R1/r3PKPk/q3N3/2P5/n7/8/2Rb4/7b w - - 0 1"]
[PlyCount "16"]
[EventDate "2018.??.??"]

1. Nf8+ Rxf8+ 2. gxf8=N+ $1 Kh6 3. Rg6+ Qxg6+ 4. Nxg6 Bd5+ (4... Be4 5. Rxd2
Bxg6+ 6. Kf8 {draws.}) 5. Kf8 Nxc5 $1 {The only way to prevent White's double
threat 6.e8Q and 6.Rxd2.} 6. Rxc5 (6. e8=Q $2 Ne6+ 7. Qxe6 Bb4+ $1 8. Qe7 Ra8+
{wins}) (6. Rxd2 $2 {and now the clearest win is} Nd7+ 7. Ke8 Nf6+ 8. Kd8 Rd7+
9. Kc8 Bb7+) 6... Ra8+ 7. e8=B $1 (7. e8=Q $2 Bb4 $1 8. Ne7 Bxc5 {(no
stalemate)} 9. Qxa8 Bxa8 {wins.}) 7... Bb4 8. Ne7 Bxc5 {Double-pin stalemate
with promoted pinned pieces.} 1/2-1/2

[Event "EG"]
[Site "?"]
[Date "2020.??.??"]
[Round "?"]
[White "Østmoe, Geir Sune Tallaksen"]
[Black "Win"]
[Result "1-0"]
[SetUp "1"]
[FEN "8/Q2P4/8/2P5/5p1K/5R2/3q1p2/2r3k1 w - - 0 1"]
[PlyCount "17"]
[EventDate "2019.??.??"]

1. c6 Rxc6 2. Rxf2 (2. Qxf2+ $2 Qxf2+ 3. Rxf2 Rd6 {draws.}) 2... Qe3 $1 3. Qxe3
Rh6+ $1 (3... fxe3 4. Rd2 $1 Rh6+ (4... exd2 5. d8=Q) 5. Kg3 $1 Rh8 6. Rd1#) 4.
Kg4 $1 (4. Kg5 $2 fxe3 {draws (Østmoe, Probleemblad 2019):} 5. Rg2+ $5 Kxg2 6.
d8=Q Rh2 $1 7. Qd3 Kf2 8. Qd4 Kf1 $1 9. Qf6+ Kg1 10. Qd4 Kf1 11. Qf4+ Rf2 12.
Qxe3 Rg2+ 13. Kf4 Rf2+ 14. Kg3 Rg2+ 15. Kh3 Rh2+ 16. Kxh2 {stalemate.}) 4...
fxe3 5. Rf6 $3 (5. Rd2 $2 Rh8 $1 {draws}) (5. d8=Q $2 exf2 {draws}) (5. Rg2+ $2
Kxg2 6. d8=Q e2 {draws now that the rook is on h6.} 7. Qd2 Kf1 8. Qf4+ Kg1 9.
Qe3+ Kf1 10. Qf3+ Ke1 {is a draw.}) 5... Rxf6 (5... Rh8 6. Kf3 {wins.}) 6. d8=Q
e2 7. Qd4+ {This is why Black's rook had to be forced to f6. Black's king
cannot reach the f-file.} Rf2 (7... Kg2 8. Qe5 $1 {wins, for example} Rg6+ 9.
Kf5 Kf2 10. Qf4+ Kg2 11. Qe3 Kf1 12. Qf3+ Ke1 13. Kxg6) 8. Qe4 Kf1 {Allowing
mate in 1, but otherwise Black's pawn would soon be captured.} 9. Qh1# 1-0

[Event "Pervakov 60 JT, commendation"]
[Site "?"]
[Date "2020.??.??"]
[Round "?"]
[White "Østmoe, Geir Sune Tallaksen"]
[Black "Draw"]
[Result "1/2-1/2"]
[SetUp "1"]
[FEN "3b4/6r1/k1n5/6r1/2N5/1K6/2N2Q2/2Bn4 w - - 0 1"]
[PlyCount "12"]
[EventDate "2020.??.??"]

1. Nb4+ $1 (1. Qd2 $2 Rb7+ 2. Ka2 Rd5 $1 3. Qxd5 Nc3+ {wins.}) (1. Qe1 $2 Rb7+
2. Ka2 Rg1 $1 3. Qxg1 (3. Qd2 Bf6) 3... Nc3+ 4. Ka3 Be7+ {wins.}) 1... Nxb4 2.
Qd4 Rg3+ 3. Kxb4 Be7+ 4. Nd6 R7g4 5. Bf4 Nb2 $1 {Preventing both 6.Qc4+ and 6.
Qa1+. Other moves even lose for Black.} 6. Qb6+ $1 (6. Qxb2 $2 Bxd6+ {wins.}) (
6. Kc5 $2 Rc3+ $1 7. Qxc3 Na4+ {wins.}) 6... Kxb6 {Mirror stalemate with two
pins. Aristocrat study.} 1/2-1/2

[Event "2nd TT FRME, honorable mention"]
[Site "?"]
[Date "2020.??.??"]
[Round "?"]
[White "Østmoe, Geir Sune Tallaksen"]
[Black "Win"]
[Result "1-0"]
[SetUp "1"]
[FEN "3r4/3k3P/K2N4/8/8/1pp1p3/8/4BBb1 w - - 0 1"]
[PlyCount "13"]
[EventDate "2020.??.??"]
[SourceVersionDate "2020.08.23"]

1. Ne8 $1 (1. Nf7 Ra8+ 2. Kb7 b2 3. Bd3 Rf8 ({or} 3... Re8) 4. Bxc3 e2 {draws.}
) 1... Ra8+ (1... Rxe8 2. Bb5+ Ke6 3. Bxe8 {wins, for example} c2 4. h8=Q c1=Q
5. Bc3 Qa3+ 6. Kb5 {with a mating attack.}) 2. Kb7 Ra7+ $1 3. Kb8 $1 (3. Kxa7
$4 e2+ {and Black even wins.}) 3... Bh2+ (3... e2 4. Bh3+ $1 {wins.}) 4. Kxa7
Be5 5. Bb5+ Ke7 (5... Ke6 6. Nc7+ $1 {wins, for example} Kf5 (6... Kf7 7. Bc4+
Kg7 8. Ne6+ Kxh7 9. Bxb3) 7. Bd3+ Kg5 (7... Kg4 8. Nd5) 8. Ne6+ Kg4 9. Nc5) 6.
Nf6 $1 (6. Bh4+ $2 Kf8 7. Nf6 Kg7 {draws.}) 6... Bxf6 7. Bh4 $1 {wins.} 1-0

[Event "Polasek & Vlasak 64 JT, 2.-3.prize"]
[Site "?"]
[Date "2021.??.??"]
[Round "?"]
[White "Østmoe, Geir Sune Tallaksen"]
[Black "BTM, Draw"]
[Result "1/2-1/2"]
[SetUp "1"]
[FEN "5k2/1BN1NP1p/6P1/5pK1/b4R2/1rq2Q2/2rp4/8 b - - 0 1"]
[PlyCount "25"]
[EventDate "2020.??.??"]
[SourceVersionDate "2020.08.16"]

1... h6+ $1 2. Kh5 Qf6 3. g7+ $1 Kxg7 4. Rg4+ $1 Kh7 (4... Kxf7 5. Qd5+ Kxe7 6.
Rg7+ $1 Qxg7 7. Qe6+ Kf8 8. Qc8+ Ke7 9. Qe6+ {draws.}) 5. Qxf5+ Qxf5+ 6. Nxf5
Rh3+ (6... d1=Q 7. f8=N+ {(simplest)} Kh8 8. Ng6+ Kg8 9. Bd5+ Kh7 10. Nf8+ {
draws.}) 7. Nh4 Rc5+ 8. Bd5 d1=Q 9. f8=N+ $1 Kh8 10. Nfg6+ Kh7 11. Nf8+ Kh8 12.
Nfg6+ Kg7 13. Ne8+ $1 Bxe8 {Stalemate with four pinned pieces, including one
promoted piece.} 1/2-1/2

[Event "FIDE 9th World Cup, commendation"]
[Site "?"]
[Date "2021.??.??"]
[Round "?"]
[White "Østmoe, Geir Sune Tallaksen"]
[Black "Draw"]
[Result "1/2-1/2"]
[SetUp "1"]
[FEN "7K/2p5/2P4k/1P6/5pr1/3B1Rp1/1n6/8 w - - 0 1"]
[PlyCount "18"]
[EventDate "2021.??.??"]
[SourceVersionDate "2021.06.26"]

1. b6 Nc4 $1 (1... g2 2. Rh3+ $1 Kg5 3. bxc7 g1=Q 4. c8=Q {draws.}) 2. Bxc4 (2.
b7 $2 Ne5 $1 3. b8=Q Nf7#) 2... g2 3. Rf1 $1 (3. Rh3+ $2 Kg6 {wins.}) 3... f3
$1 (3... gxf1=Q $2 4. Bxf1 Rg7 5. b7 {and White even wins.}) 4. bxc7 Rxc4 5.
Ra1 $1 ({Logical try:} 5. Re1 $2 Rxc6 6. Re6+ Rxe6 7. c8=Q g1=Q 8. Qxe6+ Qg6 {
Mutual zugzwang, White to move.} 9. Qe3+ Qg5 10. Qe6+ Kh5 11. Qf7+ Kg4 {wins.})
5... Rxc6 6. Ra6 $1 Rxa6 7. c8=Q g1=Q 8. Qxa6+ Qg6 (8... Kh5 9. Qh6+ $1 Kxh6 {
Stalemate.}) 9. Qe6 $1 {Mutual zugzwang, Black to move.} Qxe6 {Stalemate.} (
9... f2 10. Qe3+ {draws.}) 1/2-1/2

