[Retros] The Problemist March 2009

[Joost de Heer]

R407 - S.N. Ravi Shankar
5bBk/4p1pr/7p/7K/8/8/8/8 (2+6)
+---+---+---+---+---+---+---+---+

|   | . |   | . |   |*B | B |*K |

+---+---+---+---+---+---+---+---+

| . |   | . |   |*P |   |*P |*R |

+---+---+---+---+---+---+---+---+

|   | . |   | . |   | . |   |*P |

+---+---+---+---+---+---+---+---+

| . |   | . |   | . |   | . | K |

+---+---+---+---+---+---+---+---+

|   | . |   | . |   | . |   | . |

+---+---+---+---+---+---+---+---+

| . |   | . |   | . |   | . |   |

+---+---+---+---+---+---+---+---+

|   | . |   | . |   | . |   | . |

+---+---+---+---+---+---+---+---+

| . |   | . |   | . |   | . |   |

+---+---+---+---+---+---+---+---+
-2 & #2, Høeg retractor

R408 - Cedric Lytton, Dom Cyprian Stockford
1bssk2r/2p1ppbp/bp2pQ2/1p2NNr1/8/7P/PPPRB1P1/R3K3 (12+15)
+---+---+---+---+---+---+---+---+

|   |*B |*S |*S |*K | . |   |*R |

+---+---+---+---+---+---+---+---+

| . |   |*P |   |*P |*P |*B |*P |

+---+---+---+---+---+---+---+---+

|*B |*P |   | . |*P | Q |   | . |

+---+---+---+---+---+---+---+---+

| . |*P | . |   | N | N |*R |   |

+---+---+---+---+---+---+---+---+

|   | . |   | . |   | . |   | . |

+---+---+---+---+---+---+---+---+

| . |   | . |   | . |   | . | P |

+---+---+---+---+---+---+---+---+

| P | P | P | R | B | . | P | . |

+---+---+---+---+---+---+---+---+

| R |   | . |   | K |   | . |   |

+---+---+---+---+---+---+---+---+
#2 b) Bg7->h6

F2712 - Ronald Turnbull
k1K5/2P5/8/8/8/8/8/8 (2+1)
+---+---+---+---+---+---+---+---+

|*K | . | K | . |   | . |   | . |

+---+---+---+---+---+---+---+---+

| . |   | P |   | . |   | . |   |

+---+---+---+---+---+---+---+---+

|   | . |   | . |   | . |   | . |

+---+---+---+---+---+---+---+---+

| . |   | . |   | . |   | . |   |

+---+---+---+---+---+---+---+---+

|   | . |   | . |   | . |   | . |

+---+---+---+---+---+---+---+---+

| . |   | . |   | . |   | . |   |

+---+---+---+---+---+---+---+---+

|   | . |   | . |   | . |   | . |

+---+---+---+---+---+---+---+---+

| . |   | . |   | . |   | . |   |

+---+---+---+---+---+---+---+---+
Retract to bare kings in 9 halfmoves, Sentinelles

A - Mark Thornton
rn1q2rk/pppp2bp/5pp1/8/8/8/P1PPPPPP/R1BQKBNR (14+13)
+---+---+---+---+---+---+---+---+

|*R |*N |   |*Q |   | . |*R |*K |

+---+---+---+---+---+---+---+---+

|*P |*P |*P |*P | . |   |*B |*P |

+---+---+---+---+---+---+---+---+

|   | . |   | . |   |*P |*P | . |

+---+---+---+---+---+---+---+---+

| . |   | . |   | . |   | . |   |

+---+---+---+---+---+---+---+---+

|   | . |   | . |   | . |   | . |

+---+---+---+---+---+---+---+---+

| . |   | . |   | . |   | . |   |

+---+---+---+---+---+---+---+---+

| P | . | P | P | P | P | P | P |

+---+---+---+---+---+---+---+---+

| R |   | B | Q | K | B | N | R |

+---+---+---+---+---+---+---+---+
SPG 8.0

B - Mark Thornton
rn1q2rk/pppp2b1/4ppp1/8/8/8/P1PPPP1P/RNBQKBNR (14+13)
+---+---+---+---+---+---+---+---+

|*R |*N |   |*Q |   | . |*R |*K |

+---+---+---+---+---+---+---+---+

|*P |*P |*P |*P | . |   |*B |   |

+---+---+---+---+---+---+---+---+

|   | . |   | . |*P |*P |*P | . |

+---+---+---+---+---+---+---+---+

| . |   | . |   | . |   | . |   |

+---+---+---+---+---+---+---+---+

|   | . |   | . |   | . |   | . |

+---+---+---+---+---+---+---+---+

| . |   | . |   | . |   | . |   |

+---+---+---+---+---+---+---+---+

| P | . | P | P | P | P |   | P |

+---+---+---+---+---+---+---+---+

| R | N | B | Q | K | B | N | R |

+---+---+---+---+---+---+---+---+
PG 9.0

C - Itamar Faybish
1nbqkbnr/p1pppp2/8/8/8/4KP2/PP1PP2p/RNBQ1BNR (13+13)
+---+---+---+---+---+---+---+---+

|   |*N |*B |*Q |*K |*B |*N |*R |

+---+---+---+---+---+---+---+---+

|*P |   |*P |*P |*P |*P | . |   |

+---+---+---+---+---+---+---+---+

|   | . |   | . |   | . |   | . |

+---+---+---+---+---+---+---+---+

| . |   | . |   | . |   | . |   |

+---+---+---+---+---+---+---+---+

|   | . |   | . |   | . |   | . |

+---+---+---+---+---+---+---+---+

| . |   | . |   | K | P | . |   |

+---+---+---+---+---+---+---+---+

| P | P |   | P | P | . |   |*P |

+---+---+---+---+---+---+---+---+

| R | N | B | Q | . | B | N | R |

+---+---+---+---+---+---+---+---+
PG 9.5

SOLUTIONS
R401 - Thornton
1. e4 a6 2. Bb5 axb5 3. c3 Rxa2 4. Qa4 h5 5. Qa8 Ra7 6. Ra6 Rh6 7. Rxh6 
Nc6 8. Qxc8 Ra1 9. Qa8 Rxb1 10. Qa1 Rxc1+ 11. Qxc1 gxh6

R402 - Dupont
1. a4 c5 2. Ra3 c4 3. Rd3 cxd3 4. c4 h5 5. c5 h4 6. c6 h3 7. c7 hxg2 8. 
h4 f5 9. Rh3 f4 10. Rg3 fxg3 11. f4 Rh6 12. f5 Rc6 13. f6 e5 14. f7+ Ke7 
15. h5 Kf6 16. h6 Be7 17. f8=N e4 18. Ne6 dxe6 19. h7 Bd7 20. c8=N Qf8 
21. Nb6 axb6 22. h8=R Ra5 23. Rh1 Rg5 24. a5 Ke5 25. a6 Bf6 26. a7 Ne7 
27. a8=R Nc8 28. Ra1
Two CF-Knights and two Pronkin rooks.

A - Thornton
1. Nc3 g6 2. Nd5 Bg7 3. Nxe7 Bxb2 4. Nxg8 Bg7 5. Ne7 f6 6. Nxc8 O-O 7. 
Ne7+ Kh8 8. Ng8 Rxg8
To g8, away from g8, to g8.

B - Thornton
1. g4 e6 2. g5 Ba3 3. g6 Bxb2 4. gxh7 g6 5. hxg8=N Bg7 6. Ne7 f6 7. Nxc8 
O-O 8. Ne7+ Kh8 9. Ng8 Rxg8
And the same with a promoted pawn.

C - Faybish
1. c4 h5 2. c5 h4 3. c6 h3 4. cxb7 hxg2 5. bxa8=B gxf1=B 6. Bg2 g5 7. f3 
g4 8. Kf2 g3+ 9. Ke3 gxh2 10. Bxf1
Schnoebelen-bishop on f1 is replaced by a Pronkin bishop.