[Retros] Problem Paradise 22

[Joost de Heer]

Problem Paradise 22 (Apr-June 2002) arrived in the mail today. Here are the retro compositions (and compositions with retro-elements) in this issue.

W120 - Janis Lukasevics
1k6/1P1p4/pKp5/S1PP4/8/8/8/8
+---+---+---+---+---+---+---+---+

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

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

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

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

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

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

| S |   | P | P | . |   | . |   |

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

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

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

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

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

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

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

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

+---+---+---+---+---+---+---+---+
#2

H132 - Hiromi Tsutsui
Kb6/Rp6/p7/8/kPp5/p1p5/3P4/8
+---+---+---+---+---+---+---+---+

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

+---+---+---+---+---+---+---+---+
h#2 (b) d2->d4

F128 - Ayako Okaya
1x4xx/6xK/8/8/8/8/8/1x5x
+---+---+---+---+---+---+---+---+

|   |*X |   | . |   | . |*X |*X |

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

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

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

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

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

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

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

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

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

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

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

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

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

| . |*X | . |   | . |   | . |*X |

+---+---+---+---+---+---+---+---+
Six maskmen, 0 moves

F129 - Ayako Okaya
8/8/8/4x1x1/8/3x1K1x/8/4x1x1
+---+---+---+---+---+---+---+---+

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

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

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

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

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

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

| . |   | . |   |*X |   |*X |   |

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

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

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

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

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

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

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

| . |   | . |   |*X |   |*X |   |

+---+---+---+---+---+---+---+---+
Six maskmen, 3 moves

R054 - Eric Huber
r1b1Kbnr/pp1p1ppp/2p5/2s1p1B1/3P4/Q4P2/PPP1PqPP/RN2kBNR
+---+---+---+---+---+---+---+---+

|*R | . |*B | . | K |*B |*N |*R |

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

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

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

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

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

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

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

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

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

| Q |   | . |   | . | P | . |   |

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

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

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

| R | N | . |   |*K | B | N | R |

+---+---+---+---+---+---+---+---+
Proofgame in 9.0 moves (Transmuting kings)

R055 - Eric Huber
8/8/8/8/8/8/1K1p4/3k4
+---+---+---+---+---+---+---+---+

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

+---+---+---+---+---+---+---+---+
-1 & hs#1.5

R056 - Rustam Ubaidullaev
1rqq1b2/pPPPPPP1/2R2s1s/3Q3p/k7/3K4/bp3p2/1SB2BSR
+---+---+---+---+---+---+---+---+

|   |*R |*Q |*Q |   |*B |   | . |

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

|*P | P | P | P | P | P | P |   |

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

|   | . | R | . |   |*S |   |*S |

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

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

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

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

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

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

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

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

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

| . | S | B |   | . | B | S | R |

+---+---+---+---+---+---+---+---+
Proofgame in 28.5 moves

Six maskmen, n moves: Identify all of black's six unknowns in n consecutive
legal white king-moves, under the following conditions:
- The six black unknowns are of different type (P, S, B, R, Q, K are all
  present exactly once)
- The white king isn't in check in the diagram position.
- The white king can't capture.
- The position is legal.

Examples:
- in F128, the unknowns can be identified in the diagram position. h1 isn't a
  rook or a queen, because white isn't in check in this position.
- In F129, the first white move can't be Kf3-f2, because no black unknown
  could be a knight then.

Transmuted kings: When in check, the king moves like the checking piece for
one halfmove. Example: The game can start with 1. e4 f5 2. Qh5 Kh5 (black king
moves like a queen, because he's in check by the white queen).

Joost
-- 

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