[Retros] Retro solving in Messigny 2011

[Eiad Al-Khanshour]

First puzzle
a)1-d4 Nf6 2-Bf4 Nd5 3-B.c7
b)1-d4 c5 2-Bf4 c4 3-Bc7 c3 4-N.c3 Nf6 5-Nb1 Nd4

From: CAILLAUDM at aol.com 
Sent: Tuesday, June 14, 2011 11:57 PM
To: retros at janko.at 
Subject: [Retros] Retro solving in Messigny 2011

Hello,

Below are the problems submitted this year.

They belong to the Phenix 2011 tourney for original retros.
There were more PGs than classical retros, but more points for solving a classical retro than for a PG...
There was some incident as I misprinted number of moves of 6 (7.0 instead of 7.5) but this was soon detected (by Pascal Wassong) and corrected.

The 8 problems were to be solved in 2 hours.
Can you do better than the winner, Thierry Le Gleuher, who scored the maximum (48 points; also the only one to do so) in 1h13'?  (Thierry says he was even quicker than that, but he took time to re-read carefully his redaction before handing back his copy!).

Best,
Michel

1 :
rnbqkb1r/ppBppppp/8/3n4/3P4/8/PPP1PPPP/RN1QKBNR
PG a) 2.5 b) 5.0  (16+15) (2+3 points)

2 :
rn1qk1nr/1pp2ppp/8/3pp3/p7/1b4PN/PPPP1PP1/RNB1K3
SPG 10.0 (12+15) (5 points)

3 :
r3k1nr/ppp1p1pp/2p5/4n3/8/8/PPPNPP1P/R1BQK1NR
SPG 10.0 (13+12) (5 points)

4 :
rnbq2nr/pp1p3p/4pPPk/8/2P5/P1NB3P/P3QR1P/RNB2K2
SPG 15.5 (15+12) (5 points)

5 :
1n1q1rk1/1pp2pp1/1pn2p2/1Q1p1b1p/P7/1rP5/K1PPP1PP/RN4NR
SPG 16.5 (13+15) (5 points)

6 :
r1bqkbn1/pp1pppp1/6p1/8/2p5/8/PPPPPPPP/R1BQKBNR
SPG 7.5  Duellists  (15+14) (5 points)
Duellists (Echecs Duel, DuellantenSchach,...) : each side choses a duellist and must play with this piece until he can no longer (capture, pining, need to parry a check,...); then he can choose a new duellist.

7 :
rb5n/kPpQpp2/pN1Bp1pp/KPR1R3/PNPP4/8/4PP2/8
Which captures are determined? (14+11) (9 points)

8 :
q2RRbr1/K1ppp1p1/p1p4r/8/8/3kP1P1/3P1bPP/4B1bN
a) Add a piece on h8 then
b) What were white promotion moves?
c) Which captures are determined?
(10+13) (3+3+3 points)


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