Original Retro Problems published in 2006

1764 -

Oribit, January 2006

13+13. Proof game in 14.0 moves

[2r1k1n1/ppBn3p/2bq4/2bpp3/2BPP3/2BQ4/PPbN1P2/2R1K1N1]

1620v -

Oribit, January 2006

class="anno"> (The original version was published in Orbit 27, July 2005)

Dedicated to the memory of Guy Dupont

15+10. Proof game in 31.0 moves

[rnbqkbnr/1Npp1RP1/B7/8/5K2/1PB3P1/1PQNB1P1/2N1R3]

Nicolas Dupont wrote: "According to Gerd Wilts, who
cooked the proof game

1620, that new position, which has been controlled by a non-official
version

of Natch, seems to be correct. I thank him very much."

1816 -

Orbit, April 2006

13+13. Proof game in 13.5 moves (C+)

[2bqkb1R/2pppp2/n1N2N1n/8/8/N7/2PPPPP1/rnBQKBn1]

1817 -

Orbit, April 2006

14+15. Proof game in 16.5 moves

[rnbqkbnr/PppR1ppp/2B1p3/3p4/8/NP4PN/4PP1P/2BQ2RK]

1818 -

Orbit, April 2006

15+14. Proof game in 21.5 moves

[1n2kbBR/1pp3p1/1q1p1np1/p2r4/5p2/1P1PrP1N/1PPP1KP1/1NBQ3R]

1887 -

Orbit, July 2006

12+12. Proof game in 12,0 (C+)

[rn1qkbnr/p2p1p1p/p7/8/8/P5P1/P2P1P1P/RN1QK1NR]

1888 -

Orbit, July 2006

15+14. Proof game in 17.5 moves (C+) a) diagram b) BQg8->f7

[rnbqkbQr/ppppn2p/4p1P1/6K1/5B1R/PP1P4/2PNP1BP/6NR]

1889 - &

Orbit, July 2006

16+16. Proof game in 20.0 moves

[r2qk3/1pp2pQp/b3p2B/nRnp2p1/Bb5P/p1PP2Pr/PP1KPP2/N4RN1]

1890 -

Orbit, July 2006

10+15. Proof game in 40.0 moves

[3n2n1/1k1pp3/8/bp1p2p1/Pr5p/5pP1/bPPPPPP1/r1B1Kq2]

1961 - &

Dedicated to Nicolas Dupont

class="anno"> Orbit 32, July 2006

15+13. Proof game in 20.0 moves

[8/p2p1ppp/2p2n2/4n2k/1b2PP1q/3P3P/1PPrr1P1/RNBQKBNR]

1962 -

Orbit 32, July 2006

14+13. Proof game in 21.5 moves

[r7/1pp3bp/2k1pn2/4B1qQ/3p2B1/PPN1rP1N/p1PPnP1P/1R2K3]