ch-Fr-2020

1

Give key.

David Shire
Schach-Aktiv
1996

white Bh1c1 Kh8 Qe6 Pd6e5d3f2 Sa4h4 Rh3e1 black Pa7g6h5 Sc7c6 Ba6a1 Kd4 Rg4

#2(12+9)

Solution

{
Essai
} 1.Bh1-e4 ? threat: 2.Sh4-f3 # 2.Bc1-e3 # 1...Rg4-g3 ! {

} 1.Qe6-f5 ! { 5p (menace} 2.Bc1-e3 # {)
} 1...Rg4-g2 {ou} 1...Rg4-g3 {ou} 1...Rg4-e4 2.Qf5*e4 # {
} 1...Ba6*d3 2.Qf5*d3 # {
} 1...g6*f5 2.Sh4*f5 # {
} 1...Sc7-d5 2.Sh4-f3 #

2

Give key, threats and variations up
to white move that precedes checkmate.

Alfred Pries
1er Recommandé
Die Schwalbe 1951

white Ba1g6 Ka3 Qg2 Pd4c5 Sa5d3 Ra4e2 black Pa2c3f6g3 Kd5 Bg8f2 Sh5h2 Rf3

#2(10+10)

Solution

{

} 1.Re2-e3 ! { 5p (blocus)
} 1...Bf2-e1 {ou} 1...Bf2-g1 {ou} 1...Bf2*e3 2.Qg2*a2 # {
} 1...Sh2-f1 {ou} 1...Sh2-g4 2.Qg2*f3 # {
} 1...c3-c2 2.Sd3-b4 # {
} 1...Sh5-f4 {ou} 1...Sh5-g7 2.Sd3-f4 # {
} 1...f6-f5 2.Re3-e5 # {
} 1...Bg8-e6 2.Bg6-e4 # {
} 1...Bg8-f7 {ou} 1...Bg8-h7 2.Bg6-f7 #

3

Give key, threats and variations up
to white move that precedes checkmate.

Mikola Kartsev, 1er Prix
Shakhmaty
1er semestre 1925

white Qd1 Pa5e7e6d6h6c2 Kb1 black Pb4a6h7f7d7g5 Sg1 Ke8

#3(8+8)

Solution

{

} 1.Kb1-b2 ! { 1p (blocus)
} 1...Sg1-e2 2.Qd1-h1 { 0.8p} 3.Qh1-a8 # {
} 2...d7*e6 3.Qh1-c6 # {
} 2...f7*e6 3.Qh1-h5 # {
} 1...Sg1-h3 2.Qd1-f3{ 0.4p} 3.e6*f7 # 3.Qf3-a8 # 3.Qf3*f7 # {
} 2...Sh3-f4 3.Qf3-a8 # {
} 2...d7*e6 3.Qf3-c6 # {
} 2...f7-f5 3.Qf3-h5 # 3.Qf3-a8 # {
} 2...f7-f6 3.Qf3-h5 # 3.Qf3-a8 # {
} 2...f7*e6 3.Qf3-h5 # 3.Qf3-f8 # {
} 1...Sg1-f3 2.Qd1*f3 { 0.4p} 3.e6*f7 # 3.Qf3-a8 # 3.Qf3*f7 # {
} 2...d7*e6 3.Qf3-c6 # {
} 2...f7-f5 3.Qf3-h5 # 3.Qf3-a8 # {
} 2...f7-f6 3.Qf3-h5 # 3.Qf3-a8 # {
} 2...f7*e6 3.Qf3-h5 # 3.Qf3-f8 # {
} 1...b4-b3 2.Qd1-g4 { 0.8p} 3.e6*d7 # {
} 2...d7*e6 3.Qg4-a4 # {
} 2...f7-f5 3.Qg4-h5 # {
} 2...f7-f6 3.Qg4-h5 # {
} 2...f7*e6 3.Qg4-h5 # {
} 1...g5-g4 2.Qd1-d5 { 0.8p} 3.e6*f7 # 3.Qd5-a8 # {
} 2...d7*e6 3.Qd5-c6 # {
} 2...f7-f5 3.Qd5-a8 # {
} 2...f7-f6 3.Qd5-a8 # 3.Qd5-h5 # {
} 2...f7*e6 3.Qd5-h5 # {
} 1...d7*e6 2.d6-d7 + { 0.8p} 2...Ke8*e7 3.d7-d8=Q #

4

Give key, threats and variations up
to white move that precedes checkmate.

Igor A. Agapov, 1er-2è Px
Shakhmatnaya Kompozitsiya
2009

white Bf5e1 Kg1 Qe6 Pd5f6f3f2c2 Sh4e5 Rc6h5 black Kd4 Pc7b6c4 Rg8 Bb5a1 Sg6g4

#3(13+9)

Solution

{

} 1.Be1-b4 ! threat: 2.Rc6*c4 + 2...Bb5*c4 3.Se5-c6 # { 1p} 1...Sg4*e5 {display-departure-rank} 2.Bf5-g4 {(menace} 3.Sh4-f5 # {) 1p
} 2...Se5*f3 + 3.Sh4*f3 #{
} 2...Sg6*h4 3.Qe6*e5 #{
} 2...Sg6-e7 3.Qe6*e5 # {
} 1...Sg6*e5 {display-departure-rank} 2.Bf5-g6 threat: 3.Sh4-f5 # { 1p} 2...Sg4-e3 3.Qe6*e5 #{
} 2...Sg4-h6 3.Qe6*e5 #{
} 2...Se5*f3 + 3.Sh4*f3 #{
} 1...Sg4-e3 2.Se5-g4 3.f2*e3 # 3.Qe6-e4 # { 1p
} 2...Se3-d1 {ou} 2...Se3-f1 {ou} 2...Se3-g2 {ou} 2...Se3*g4 {ou} 2...Se3*f5 {ou} 2...Se3*d5 3.Qe6-e4 # {
} 2...Sg6-e5 3.Qe6*e5 # 3.f2*e3 # {
} 2...Rg8-e8 3.f2*e3 # 1...Sg6-e7 2.Se5-g6 threat: 3.Qe6-e4 # { 1p} 2...Sg4*f2 3.Qe6-e5 # 2...Sg4*f6 3.Qe6-e5 # 2...Sg4-e5 3.Qe6*e5 #

5

Give solution up to white move that precedes checkmate.

Meindert Niemeijer, 3è Px
Chemnitzer Tageblatt
1925 (mirror)

white Pc3b2c6 Ka7 Rd3f3 Sd7g1 Be8h8 black Pa2b5e5d6g3h4 Sa1 Rg8h6 Ke4

#4(10+10)

Solution

{

} 1.Sg1-h3 ! threat: 2.Be8-g6 + 2...Rh6*g6 {display-departure-file} 3.Sh3-g5 + 3...Rg6*g5 4.Sd7-f6 # {ou} 2...Rg8*g6 {display-departure-file} 3.Sd7-f6 + 3...Rg6*f6 4.Sh3-g5 # { 1.5p} 1...Rh6-h7 2.Bh8-g7 { 0.5p (menace} 3.Be8-g6 # 3.Sd7-f6 # 3.Sh3-g5 # {)
} 2...Rh7*g7 {display-departure-file} 3.Sh3-g5 + 3...Rg7*g5 4.Sd7-f6 # { 0.5p
} 2...Rg8*g7 {display-departure-file} 3.Be8-f7 {0.5p (} 4.Bf7-d5 # 4.Sd7-f6 # 4.Rd3-e3 # {)
} 3...Rg7*f7 4.Sh3-g5 # {
} 1...Rh6-e6 2.Rd3-e3 + 2...Ke4-d5 3.Sd7-b6 + { 1p} 3...Kd5-c5 4.b2-b4 # {
} 1...Rg8-g4 2.Sd7-c5 + 2...d6*c5 3.Rf3-e3 + { 1p} 3...Ke4-f5 4.Re3*e5 #

6

Give solution up to white move that precedes checkmate.

Eric Huber (ap. S.A.Yatskevich)
Shakhmatny Listok
1861

white Pf5b4g2 Sc6d5 Be6 Kc3 Rd8 black Pe5f6e7 Ke4

#5(8+4)

Solution

{

} 1.Rd8-d6 ! { 1p
} 1...e7*d6 2.Be6-c8 { 2p
} 2...Ke4*d5 3.Sc6-e7 + {
} 3...Kd5-e4 4.Se7-d5 { 2p
} 4...Ke4*d5 5.Bc8-b7 #

7

Give main variation.

E. Pogosiants, Commendation
Nadareishvili JT
Molodost Gruzzi 1983

white Qf8 Pg7 Kc5 Ra2 Be4 black Qg4 Pe2 Kb3 Bc4 Rg8

=(5+5)

Solution

{

} 1.Ra2-a3 + { 1p
} 1...Kb3*a3 2.Kc5*c4 + Ka3-a2 3.Qf8*g8 { 1p
} 3...Qg4*e4 + 4.Kc4-c3 + Ka2-a1 5.Qg8-a2 + { 1p
} 5...Ka1*a2 6.g7-g8=Q + Ka2-a1 7.Qg8-h8 { 1p
} 7...e2-e1=Q + 8.Kc3-b3 + Qe4-e5 9.Qh8-a8 + Qe1-a5 {
} 10.Qa8-h1 + Qe5-e1 11.Qh1-h8 + {= 1p}

8

Give complete solution.

P.Martoudis & B.Zappas
2ème Prix
Probleemblad 1991

white Pb2c2b4 Ka3 Be8 Sd7 Rh6 black Bd5 Ke3 Qe4 Pc4d4f5g4h5f7 Sa2a4 Rd8g5

h#3 3sol.(7+13)

Solution

{

} 1.Qe4*c2 Rh6-c6 2.Ke3-d3 Rc6*c4 3.Kd3*c4 Sd7-e5 # { 1.5p

} 1.Qe4-e5 Sd7-b6 2.Ke3-e4 Sb6*d5 3.Ke4*d5 Be8-c6 # { 1.5p

} 1.f7-f6 Be8-g6 2.Ke3-f4 Bg6*f5 3.Kf4*f5 Rh6*f6 # { 2p}

9

Give the key, threats and variations
until the white move that precedes mate.

Peter Gvozdjak
3ème Prix
Die Schwalbe 1986

white Qd3 Pd2c3b2f4g5 Sc6h8 Bd8h5 Kc1 black Pd7c7b3a2 Ke6 Bb1 Ra1

s#2(11+7)

Solution

{

} 1.Bh5-e8 ! { 2p
} 1...d7-d6 2.Qd3-e4 + { 1p} 2...Bb1*e4 # {
} 1...d7-d5 2.Qd3-g6 + { 1p} 2...Bb1*g6 # {
} 1...d7*c6 2.Be8*c6 { 1p} 2...Bb1*d3 # 2...Bb1-c2 #

10

Give the key, threats and variations
until the white move that precedes checkmate.

Camillo Gamnitzer
2nd Honor Mention
Schach-Aktiv 1992

white Bd2 Kf1 Qd5 Ph2d4c4c3c2b2 Sh6h5 Rf7 black Pc7h3f2e4 Kf3 Ba7b1 Sf5 Ra2

s#5(12+9)

Solution

{

} 1.Rf7-f6 ! threat: 2.Qd5-g8 {suivi de} 3.Qg8-g2 + { 2p} 3...h3*g2 # {)
} 1...Ra2-a1 2.Bd2-c1 {(threatens } 3.Qd5-g8 {suivi de} 4.Qg8-g2 + { 1.5p} 4...h3*g2 # {)
} 2...Bb1-a2 3.Qd5*e4 + 3...Kf3*e4 4.Rf6-e6 + 4...Ke4-f3 {
} 5.Re6-e3 + { 1.5p} 5...Sf5*e3 # {

} 1...Bb1*c2 ? 2.Qd5-g8 threat: 3.Qg8-g2 + 3...h3*g2 # 2...Ra2-a1 + 3.Bd2-c1 threat: 4.Qg8-g2 + 4...h3*g2 #

11

Give the key.

Kjell Widlert
2nd Honor Mention
Problemas 1977-78

neutral Qa2 Sf5e5 Rg7h5d2 Bd4d3 black Ph6h4c2e2a5 Kd5 Rc1 white Sc8d8 Pe7b3f3f4 Ka8 Ra7 Bb6

#2(9+7+8)

Solution

{

} 1.nBd3*f5 ! { 5p} 2.Ra7*a5 # {
} 1...nSe5-c4 2.b3*c4 # {
} 1...nSe5-d3 2.Ra7-d7 # {
} 1...nSe5-d7 2.Ra7*d7 # {
} 1...nSe5-c6 2.Ra7-d7 # {
} 1...nBf5-d3 2.Ra7-d7 # {
} 1...nBf5*c8 2.nBd4*e5 # {
} 1...nBf5-d7 2.Ra7*d7 # 2.nBd4*e5 #