The Retrograde Analysis Corner

Problem Paradise

No. 15

R017 - Thierry le Gleuher
Problem Paradise 15

[3r4/pppn1pp1/3b1pp1/2NkP3/3qR3/3b2K1/PPPnQ1P1/RNBr4]

12+15. Proof game in 17.0 moves

R018 - Thierry le Gleuher
Problem Paradise 15

[1n4b1/1pp1kp1n/1pp1p3/7p/3q1N2/b3r1pP/PPP1PPr1/RNB1KB1R]

13+16. Proof game in 21.5 moves

R019 - Kazuo Watanabe
Problem Paradise 15

[rn1q1rk1/ppp1p2p/b2p4/3nb3/2B3b1/1B6/P1PP2PP/B3RKR1]

11+15. Proof game in 15.0 moves

R020 - Satoshi Hashimoto
Problem Paradise 15

[8/p1ppppkp/2nb3q/p2n3p/3Pb3/4P3/P1P2P1P/RNBQKBNR]

14+14. Proof game in 17.5 moves

R021 - Thomas Volet
Problem Paradise 15

[qRrQb1B1/pNBR1r1N/p1K1kP2/2p1pp2/5b1p/4P1pP/PP2PP2/8]

R022 - Satoshi Hashimoto
Problem Paradise 15

[1kn2bR1/p2bp1pr/1p1p4/2p1q1B1/8/b2P1pr1/PPPQPPP1/2KR1B2]

13+15. Proof game in 28.5 moves

R023 - Gianni Donati
After Michel Caillaud
Problem Paradise 15

[1nbqk3/pQpNpRpp/1pp2p1P/7n/2PRK2B/P3PP2/P2P2P1/5r2]

14+14. Proof game in 28.0 moves

R024 - Ken Kousaka
Problem Paradise 15

[6nQ/p1pn1ppr/p2rp1k1/4p1p1/5P2/b2P4/PP1PPP2/RNB1K1N1]

13+14. Proof game in 19.0 moves

R025 - Gianni Donati & Mark Kirtley
Problem Paradise 15

[2bqkbnr/1pppRppp/8/8/Q1P3K1/1PNB1P2/1PP2RPP/1NB5]

15+12. Proof game in 16.5 moves

R026 - Satoshi Hashimoto
Problem Paradise 15

[rnbqk2r/pp2pp2/2p2p1p/7n/8/2P2B2/PPP1PPKP/RN1Q2NR]

14+14. Proof game in 14.0 moves