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Probleemblad

April-June 2008

R336 - Eyjolfur Eyjolfsson

Probleemblad, Apr-Jun 2008

[rNBqn1N1/p1pp1qp1/1pr1pp2/8/7B/P7/P1PP1PPP/R2QKbnR]

15+14. Shortest proof game in 17.0 moves

[rNBqn1N1/p1pp1qp1/1pr1pp2/8/7B/P7/P1PP1PPP/R2QKbnR]

Solution

1. Nf3 Nc6 2. Ne5 Nd4 3. Nc6 Nxe2 4. Nb8 Ng1 5. Bd3 b6 6. Bxh7 Ba6 7. Be4 Rh6 8. Bb7 Rc6 9. Nc3 e6 10. Nd5 Ba3 11. Ne7 Nf6 12. Ng8 Qe7 13. bxa3 Kd8 14. Bb2 Ne8 15. Bf6 Bf1 16. Bh4 f6 17. Bc8 Qf7

Belfort-theme


R337 - Jorge Lois, Roberto Osorio

Probleemblad, Apr-Jun 2008

[rB1q1bnr/p1Rp1pkp/1pnp1p2/2p2P2/5K2/5N2/PPPN1PPP/3B4]

13+15. Shortest proof game in 19.0 moves

[rB1q1bnr/p1Rp1pkp/1pnp1p2/2p2P2/5K2/5N2/PPPN1PPP/3B4]

Solution

1. e4 c5 2. Qf3 Nc6 3. Qf6 gxf6 4. Ke2 Bh6 5. Kf3 Bxd2 6. Be2 Ba5 7. Bf4 Kf8 8. Bb8 Kg7 9. Kf4 Qf8 10. Nf3 Bd8 11. Rd1 b6 12. Rd6 Ba6 13. Nbd2 Bc4 14. Re1 Be6 15. Bd1 Bf5 16. exf5 exd6 17. Re8 Be7 18. Rc8 Qd8 19. Rc7 Bf8

The black queen and bishop exchange places twice.


R338 - Henryk Grudzinski, Falk Tippmann

Probleemblad, Apr-Jun 2008

Dedicated to Jürg Burkhalter

(This problem was later found to be cooked)

[rn2k1nr/4b3/b3q3/8/1p1p1p1p/p1p1p1p1/PPPPPPPP/RNBQKBNR]

16+16. Shortest proof game in 14.0 moves (Sentinelles)

[rn2k1nr/4b3/b3q3/8/1p1p1p1p/p1p1p1p1/PPPPPPPP/RNBQKBNR]

Solution

Intention: 1. h4 g5 2. hg5 e6 3. Rh7 Ba3 4. Rf7 Bb4[+a3] 5. Rd7 Be7[+b4] 6. Rc7 Qd4 7. Rb7 Qc3[+d4] 8. Ra7 Qg3[+c3] 9. Ra6 Qg5[+g3] 10. Re6[+a6] Qf4[+g5] 11. Rh6 Qe3[+f4] 12. Rh4 Ba6 13. Rh2[+h4] gh4 14. Rh1[+h2] Qe6[+e3]

Cooked by Eddy van Beers: 1. e3 e6 2. Qh5 Qh4 3. Qh7 f5 4. Qf5 d5 5. Qd5 Qg3[+h4] 6. Qb7 Qf4[+g3] 7. Qa7 Qb4[+f4] 8. Qc7 Qa3[+b4] 9. Qg7 Qc3[+a3] 10. Qf6 Qd4[+c3] 11. Qe6 Be7 12. Qc4 Ba6 13. Qe2 Qe3[+d4] 14. Qd1[+e2] Qe6[+e3]


R339 - Vlaicu Crisan, Paul Raican

Probleemblad, Apr-Jun 2008

(This problem was later found to be cooked)

[8/p7/7K/2n1p3/1nn5/8/8/8]

1+5. -1 & h#1 (Help retractor, Circe Assassin) a) diagram b) a7->d7

[8/p7/7K/2n1p3/1nn5/8/8/8]

Solution

a) Retract -1. Ra1*Pa7 Kb5*Rc5[+Ra1,-Sa1] and 1. Ka4 Ra5#

b) Retract -1. Qd1*Pd7 Kd4*Qc5[+Qd1,-Bd1] and 1. Kd3 Qd4#

a) is cooked: -1. Qa6/Qb8*Pa7 Kd5-c5 and 1. e4 Qd6#


R340 - Klaus Wenda

Probleemblad, Apr-Jun 2008

[5qBR/5P1R/5P2/4B3/4p3/4p2k/4p2p/4K2b]

7+7. -7 & #1 (Proca retractor, Anticirce)

[5qBR/5P1R/5P2/4B3/4p3/4p2k/4p2p/4K2b]

Solution

-1. Kf3xBg2[+Ke1]! Qc8-f8 -2. Rh4-h7 Bf1-g2 -3. g7-g8=B Bg2-f1 -4. g6-g7 Bf1-g2 -5. g5-g6 Bg2-f1 -6. g4-g5 Bf1-g2 -7. g2-g4 and 1. Bxh2[+Bc1]#

It might be for the first time that one sees a white retro-Excelsior with under-promotion in a defensive retractor (Author).