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Die Schwalbe

No. 240, December 2009

14314 - Nikolai Beluchov

Die Schwalbe 240, December 2009

[NbB5/QRRp2pp/Npp1p2P/k7/p1P2p2/K2P4/qPrP2P1/r1Bn4]

14+14. Release the position!

[NbB5/QRRp2pp/Npp1p2P/k7/p1P2p2/K2P4/qPrP2P1/r1Bn4]

Solution

1. Qb1xBa2 h5-h6 2. Sc3-d1 Bb3-a2 3. Sa2-c3 h4-h5 4. Rc3-c2 Bd1-b3 5. Rc2-c3 Bh5-d1 6. f5-f4 Be8-h5 7. f6-f5 e7-e8=B 8. f7-f6 f6xSe7 9. Sf5-e7 h3-h4 10. Sd4-f5 h2-h3 11. Sb3-d4 f5-f6 12. Rc3-c2 f4-f5 13. Qc2-d1 f3-f4 14. Rb1-a2 f2-f3 15. Sb4-a2 Ka2-a3 16. Sd5-b4 Ka3-a2 17. S~-d5 Ka2-a3 18. Kb4-a5 Sc5-a6 etc.


14315 - Joaquim Crusats, Andrei Frolkin

Die Schwalbe 240, December 2009

[3bk1nr/2Rp3p/NpBp3p/B4K2/5P2/PP4pP/2R2p1P/8]

11+11. -17 & #1, Proca retractor

[3bk1nr/2Rp3p/NpBp3p/B4K2/5P2/PP4pP/2R2p1P/8]

Solution

Try: -1. Kf6-f5? Se7-g8 -2 . Kg7-f6 and 1. Bd7#, but this fails on the forward  defense -1... Se7-g8 and 1...OO!#

-1. g2xBh3 g4-g3 -2. Ra2xBc2! Now black can't uncapture anything, because the pawn structure and promoted bishop need 5 captures. -2... Bd1-c2 -3. Bc3xRa5! Ra4-a5 -4. Ke4-f5 Ra5-a4 -5. Kd5-e4 Ra4-a5 -6. Kc4-d5 Ra5-a4 -7. Kb5-c4 Ra4-a5 -8. Kb4-b5 Ra5-a4 -9. Rd2xSa2 Sc1-a2 [Because of this move, the white bishop had to come from c3 on the 3rd move] -10. Kb5-b4 Ra4-a5 -11. Kc4-b5 Ra5-a4 -12.  c2xQb3 Qb2-b3 -13. Kd5-c4 Ra4-a5 -14. Ke4-d5 Ra5-a4 -15. Kf5-e4 Ra4-a5 -16. Kf6-f5 [and because of the forward defense Qb2xc3#, the white rook had to go to d2 on the 9th move. Because there are 16 black pieces on the board, the white e-pawn had to promote on e8, so no forward defense OO now!] Se7-g8 -17. Kg7-f6 & 1. Bd7#

Further tries:

a) -9. Rc2xSa2 ... -14. Rd2xQc2 Sd3-c1 -15. Kf5-e4 Ra4-a5 -16. Kf6-f5 Se7-g8 & 1. Qc3#.

b) -9. Rc2xSa2 ... -15. Rd2xQc2 Sd3-c1 & 1. Rf4#!


14316 - Stephan Dietrich

Die Schwalbe 240, December 2009

[2k3nr/p1p1pp1p/bn4p1/3p4/8/8/PPNPPPPP/RN2KBNR]

14+12. Shortest proof game in 11.5 moves

[2k3nr/p1p1pp1p/bn4p1/3p4/8/8/PPNPPPPP/RN2KBNR]

Solution

1. c4 d5 2. c5 Nd7 3. c6 Nb6 4. cxb7 Qd7 5. b8=N Ba6 6. Nxd7 O-O-O 7. Nxf8 Rd6 8. Ne6 Rc6 9. Nd4 Rxc1 10. Nc2 Rxd1+ 11. Kxd1 g6 12. Ke1

14317 - Bernd Gräfrath

Die Schwalbe 240, December 2009

(Misprint fixed. In the printed issue of Die Schwalbe, there was a wNd1 instead of a wQd1)

[b3k1nr/p2ppp1p/2n3p1/2p5/8/8/P2PPPPP/b1BQKBNR]

12+13. Shortest proof game in 9.0 moves (Losing chess)

[b3k1nr/p2ppp1p/2n3p1/2p5/8/8/P2PPPPP/b1BQKBNR]

Solution

1. c4 g6 2. c5 Bg7 3. c6 Bxb2 4. cxb7 Bxa1 5. bxa8=N c5 6. Na3 Nc6 7. Nc4 Bb7 8. Ncb6 Qxa8 9. Nxa8 Bxa8

14318 - Paul Raican, Vlaicu Crisan, Ion Murarasu

Die Schwalbe 240, December 2009

[2bq3r/pp5p/4N2k/2ppppp1/PPPPPPPP/8/8/RNBQK2R]

15+12. Shortest proof game in 34.0 moves (Duellist)

[2bq3r/pp5p/4N2k/2ppppp1/PPPPPPPP/8/8/RNBQK2R]

Solution

1. h3 Nf6 2. h4 Nh5 3. f3 Nf4 4. c3 Ne6 5. c4 Nc5 6. a3 Nb3 7. a4 Na5 8. e3 Nac6 9. e4 Ne5 10. g3 Ng4 11. b3 Ne3 12. b4 Ng2+ 13. Bxg2 d6 14. Bh3 d5 15. Bd7+ Nxd7 16. d3 Nc5 17. d4 Ne6 18. g4 Ng5 19. f4 Nf3+ 20. Nxf3 g6 21. Ng5 c6 22. Ne6 c5 23. Nc7+ Kd7 24. Nxa8 Ke8 25. Nb6 f6 26. Nd7 f5 27. Nf6+ Kf7 28. Nd7 Ke8 29. Ne5 e6 30. Nd7 e5 31. Nf6+ Kf7 32. Nd7 Kg7 33. Nxf8 Kh6 34. Ne6 g5


14319 - Paul Raican

Die Schwalbe 240, December 2009

[2k2b1r/8/6b1/2P3P1/r1P1P3/p7/3K4/3B4]

6+6. -8 & #1 (Proca retractor, Circe assassin)

[2k2b1r/8/6b1/2P3P1/r1P1P3/p7/3K4/3B4]

Solution

-1. d4xRc5[-bBh8;+bRh8]! (now white is in check because d4 is attacked by Bh8!) Re5-c5 -2. Ke2-d2 (again check because of Bg6xPe4/Re5xPe4) Rf5-e5 -3. Kd2-e2 Re5-f5 -4. Ke2-d2 Rf5-e5 -5. Kd2-e2 Rf6-f5 (Re5-f5?? illegal) -6. c2-c4 Ra~-a4 -7. h4xBg5[-bBf8;+bBf8] Se3xc2[-bSc2;+wPc2]! -8. Qe7xBf8[-wQf8;+bBf8] & 1. h5# (Kc8 is in check because Bg6 is attacked, and b8 isn't a flightsquare because of Kd2xSe3)


14320 - Günther Weeth, Klaus Wenda

Die Schwalbe 240, December 2009

[7n/bnp2r2/r2p4/k1q5/8/1bp5/6p1/4K3]

1+12. -7 & #1 (Proca retractor, Anticirce, Magic square f2)

[7n/bnp2r2/r2p4/k1q5/8/1bp5/6p1/4K3]

Solution

-1. Kf2xBf1[Ke1]! Sd8-b7 -2. Ke2-f2 f2-f1=B -3. Kf1-e2 g3-g2 -4. e5xRf6[Pf2=b] Qf2-c5 -5. Qg2-f2[=b] Bf2-a7 -6. Bc5-f2[=b] Ra8-a6 -7. Qc6-g2 & 1. Bb4#


14321 - Per Grevlund

Die Schwalbe 240, December 2009

[8/1p4pp/8/3p4/8/3R1P1p/1K2P3/8]

4+5. Add two black pieces for #1 (Monochrome chess) a) diagram b) d5->e5

[8/1p4pp/8/3p4/8/3R1P1p/1K2P3/8]

Solution

a) Tries:

a1) +bKh5; bPg6 & 1. Rxd5# but 5 black pawns on white squares: illegal

a2) +bKh1; bRg2 & 1. Rd1# but illegal: Bf1 was captured by a promoted black piece (Ra8/Bc8/Sg8 all couldn't have reached f1, and Bf1 should be gone when the black king enters the SE corner after g2xf3 Kg4-h3), but all pawns on white squares are present in the diagram.

Solution: +bKh5; bRg6 & 1. Rxd5#

b) Now a black pawn can promote (d7-d5xPc4xPb3epxPa2xSb1=Rxf1), so the solution is +bKh1; bRg2 & 1. Rd1# 


14322 - Andreas Thoma

Die Schwalbe 240, December 2009

[RNBQKBNR/8/8/8/1q6/8/8/1k6]

8+2. After 5 moves, all pieces are on their home square. White starts. (Circe, anticirce)

[RNBQKBNR/8/8/8/1q6/8/8/1k6]

Solution

1. Rh1 Ka2 2. Qd1 Qb8[bQ->d8;+wSg1] 3. Kd8[wK->e1;+bQd8] Qc8[bQ->d8;+wBf1] 4. Ba3 Qg8[bQ->d8;+wSb1] 5. Rxd8[wR->a1;+bQd8] Ka3[bK->e8;+wBc1]


14323 - Bernd Schwarzkopf

Die Schwalbe 240, December 2009

Illegal cluster with wK, 3wB, bK (4+1). The white king is on a white square, the white bishops on an edge square.

[IC mit wK, 3wL, sK (4+1). Der wei?#376;e König steht auf einem wei?#376;en Feld, die wei?#376;en Läufer auf Randfeldern]

Solution

wKf7, wBg8, wBh6, wBh8, bKh7


14324 - Bernd Schwarzkopf

Die Schwalbe 240, December 2009

Illegal cluster with wK, wR, wB, wS, bK (4+1). In the IC, the black king is mate, and the distance between the home square and the actual square for both kings is equal.

[IC mit wK, wT, wL, wS, sK (4+1). Die gesuchte Stellung ist eine Mattstellung, in der die Entfernungen der beiden Könige zu ihren jeweiligen Ursprungsfeldern gleich sind.]

Solution

wKc5, wRa8, wBc8, wSb8, bKa6