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Solutions

3508 - Heinonen, Unto
1. e4 f6 2. e5 fxe5 3. d4 exd4 4. Nc3 dxc3 5. Qd6 exd6 6. h4 Qxh4 7. a4 Qxa4 8. Bb5 Qxc2 9. Bc6 bxc6 10. Ra6 Bxa6 11. Ne2 Bxe2 12. f3 Bxf3 13. Rh5 Bxg2 14. Rc5 dxc5 15. b4 cxb4 16. Bd2 Qxd2 mate

3509 - Caillaud, Michel
1. b4 c5 2. b5 c4 3. b6 c3 4. Nxc3(=bN) Nb1 5. Rxb1(=bR) Rb3 6. cxb3 (=bP) b2 7. Bxb2 (=bB) Bc3 8. dxc3 (=bP) c2 9. Qxc2 (=bQ) Qc7 10. bxc7 (=bP)

3510 - Rösler, Peter
1. h4 d5 2. h5 Nd7 3. h6 Ndf6 4. hxg7 Kd7 5. Rh6 Ne8 6. gxf8=N mate

3511 - Steudel, Friedrich Theodor
Set play is -1 ... Ke2xQf3, then 1. Ke1 Qd3=.

Solutions:
-1. Kh2-g1 Kg4xQf3, then 1. Kh4 Qf5=, and
-1. Kf1-g1 Kg3xQf3, then 1. Kh2 Kf2=

3512 - Steudel, Friedrich Theodor
-1. Ke4-d5 Kh1xRg2, then 1. g3 Kf3=

3513 - Steudel, Friedrich Theodor
-1. Kf2-f1 Gh3-h8, then 1. Kh1 h8=G=

3514 - Gla?#376;, Günter
-1. Bh1-g2+ Kh2-h3, then 1. Kxh1(Bf1) Bg2#

3515 - Gla?#376;, Günter
-1. Re7-e8+ Ng5-f3, then 1. Nh7 Rxh7(Ng8)#

3516 - Gla?#376;, Günter
-1. e5xPf6+ Ke6xPe7, then 1. d5 e8=Q#

3517 - Gla?#376;, Günter
-1. f2xPg3 Qg1xNf1, then 1. g2 Ng3#

3518 - Oliva, Zdenek
Seems cooked: -1. Kd6xBd5 (or Kd6xPd5), then 1. Ne6 (or Nf5) Qc6#
-1. Ke4xRd5, then 1. Kf4 Rd4#
-1. Ke4xQd5, then 1. Kf4 Qdc4 (or Qdd4,Qdf3,Qcf3)#

3555 - Oliva, Zdenek
-1. d7xRc8=N a2xBb1=R, then 1. Re8 dxe8=Q 2. a1=B Qe3=

3562 - Büsing, Günter
1. a4 h5 2. a5 h4 3. a6 h3 4. axb7 hxg2 5. bxa8=R gxh1=R 6. Bh3 Ba6 7. Kf1 Qc8 8. Kg2 Kd8 9. Kf3 Qb7+ 10. Ke3 Qg2 11. Nf3 Kc8 12. Qg1! Qf1 13. Qg2 Kb7 14. Ng1+ Kb6 15. Qb7+ Kc5 16. Qc8 Qd1 17. Qd8 Bc8 18. Bf1

wQ and bQ switch places, wRh1 and bRa8 seem to do so.

A - Kricheli, Josif Michailowitsch
-1. Kc5xNd6 Ka5xBa4, then 1. Nb5 Bxb5=, or
-1. Kc5xPd6 c7xQd6+, then 1. Ka5 Qc6=

B - Staudte, Hans Hilmar
-1. Kc3-d2 Ka4xBa5, then 1. b5 Bb4=, or
-1. - a7xRb6, then 1. a6 Rb4=

3607 - Schiegl, Hansjörg
-1. Rc5xRc8 Rc6-c8+, then 1. Rb6 Ra5#

3608 - Schiegl, Hansjörg
-1. Rg5xNg6 Kh5-h4, then 1. Kh6 Rh5#

3609 - Schiegl, Hansjörg
-1. d7xBc8=B Ba6-c8, then 1. Bb7 d8=D#

3610 - Schiegl, Hansjörg
-1. Nb4-a6 Bb3xPa2, then 1. Ba4 Nc2#

3634 - Oliva, Zdenek
-1. e7xRf8=Q++ d2-d1=B, then 1. d1=R exd8=N# (the four promotions).

3666 - Olin, Per Ingvar
1. d3 h5 2. Kd2 h4 3. Kc3 h3 4. Kb4 Rh4+ 5. Ka5 Ra4+ 6. Ka5xRa4
(a) 6 ... hxg2 7. Nh3 g1=N 8. Nf4 Nxe2 9. Nf4xNe2
(b) 6 ... hxg2 7. Nh3 gxf1=B 8. Rg1 Bxe2 9. Rg4 Be2xRg4
(c) 6 ... hxg2 7. h4 gxf1=R 8. Rh3 Rxf2 9. Rf3 Rf1 10. Rf3xRf1
(d) 6 ... hxg2 7. h4 gxf1=Q 8. Rh3 Qxe2 9. Re3 Qe1 10. Rxe7 Qe1xRe7

Four-promotions theme.

A - Bartel, Eugen Erich
1. Ka1 Rg8 2. Ka2 Rg7 .. 11. Ka1 Rb3 12. Ka2 Rb2+ 13. Ka1 Rb1+ 14. Ka2 Rb3 15. Ka1 Rc3 .. 25. Ka1 Rh8 26. Ka2

3671 - Gla?#376;, Günter
-1. Rf2-h2 Ke1xQd1, then 1. Kxf2(Ra1) Qf3#

3672 - Zagler, Ludwig
-1. Kd7-c6 b3xQa2(Pa7), then 1. Kg1 Qg2#

3673 - Zagler, Ludwig
-1. Ka7-a8 Bc7xQe5(Bf8), then 1. Kd8 Qe8#

3675 - Gla?#376;, Günter
-1. Rd5xNe5 Nc4xBe5, then 1. Ne3 Rd4#

3676 - Gla?#376;, Günter
-1. Kg7xRh8 Kh1xRg2(Rh1), then 1. Rh2 Rg1#

3718 - Tschöpe, Jürgen
1. Rh1-h5 (Ph2-h6) Qd8-f6 (Pe7-h4)
2. Rh5-h4 (Ph4-h1=Q) [Qf6-pull:] (Ph6-g6)
3. [Bc1-push:] (Pd2-h6) Qf6-off (Rh4-d8)

wRh1 and bQd8 seem to have switched places, but bQh1 is promoted.

3724 - Schiegl, Hansjörg
This problem is cooked with -1. Kf5xQf4 Qh2-f4 (or Qb8-f4)+, then 1. Qc7 Qe6#

4102 - Michel Caillaud
(a) 1. e3 Nf6 2. e4 Nxe4 3. Ke2 Nxd2 4. Qe1 Nxf1 5. Kxf1
(b) 1. e4 Nf6 2. Ba6 Nxe4 3. Kf1 Nxd2 4. Qxd2 Nxa6 5. Qe1 Nb8

4103 - Mario Velucchi
1. d4 e6 2. Qd2 Qe7 3. Qh6 Qa3 4. Bg5 Bd6 5. Nd2 Ne7 6. O-O-O O-O 7. Kb1 Rd8 8. b4 Kf8 9. b5 Ke8 10. b6 g6 11. Qg7 Qb2

4104 - Thomas Brand
Add bKh2, bPg2, wKf2 & wPg3.

4120 - Thomas Brand
Retract -1. OOO and h#2 with 1. Ra3 ba3 2. OO Qg7#

K500 - Thomas Brand
Add wPa2 and bRa1.