# Phénix

No. 194, Apr. 2010

6117 -

Phénix 194, Apr. 2010

14+16. Which Pawn gave check 146 moves before? (Circe)

[8/p7/p7/RP1P1P1P/QPkrBRP1/bpp1qKP1/1pnppprN/n1N4b]

Solution

1.Qd3×Be3# Nf1h2 2.b7×Ra6 Rb6×Pa6(Pa7) 3.a7a6 Ra8×Pa5(Pa7) (to open the cage, a Pawn must arrive on g7 to take back h3×g5(Pg7). We need to uncapture every time a wPiece. Only the wQ is able to come back at home (reborn square)4.a6a5 Rd6×Pb6(Pb7) 5.a7a6 Qa7×Pa4(Pa7) 6.a5a4 Qe7a7 7.a6a5 Qh4e7 8.b7b6 Rb6d6 (to help the wQ to come back, wR perform a cycle of 7/2 tempo. This manoeuver has been found by A. Frolkin, R7 p.219 Rex Multiplex, (oct-dec 1983)

7K/6p1/R6p/2P1P1P1/1PrbrPP1/1PpppQrb/1PB1pnpk/BRNN2nq

Minimum moves played by Ra6(circe Rex inclusiv)?

This manoeuver appears in the solution between brackets [ ] ) 9.a7a6 Ra6×Pb6(Pb7) 10.b7b6 Ra5×Pa6(Pa7) 11.a7a6 Ra4×Pa5(Pa7) 12.a6a5 Qh2h4 13.a7a6 Ra6×Pa4(Pa7) 14.a5a4 Rb6a6 15.a6a5 Qg1h2 [16.a7a6 Ra6×Pb6(Pb7) 17.b7b6 Ra5×Pa6(Pa7) 18.a7a6 Ra4×Pa5(Pa7)]19.a6a5 Nh2f1 20.a7a6 (now we can easily prepare the uncapture on b6 with 20... Ra6×Pa4(Pa7) 21.a5a4 Rb6a6 22.a6a5 Qd1g1 23.a7a6 Ra6×Pb6(Pb7) 24.c7×Qb6(Qd1) but the next switch (d7×c7) would be impossible. We have to unpromote the wRa8 to have a screen with a Pawn). 20. ... Qd1g1 21.Rg1×Qg2(Qd1) (the bR is free and we can try with this psoition : QBg2, RBa5, NBh2, Pb7, RNg1, PNa4, b6 and take back n. ... Qf1g2 n+1.Rg2g1+ Qd1f1 n+2.a7×Qb6(Qd1) Ra8×Pa5(Pa7) n+3.a6a5 Qa5b6 n+4.a7a6 Qd8×Pa5(Pa7) n+5.a6a5 b6b7 n+6.a7a6 Qh4d8 n+7.a5a4 Nf1h2 n+8.a6a5 Qh2h4 but 3 tempi are missing). 21. ... Ra6×Pa4(Pa7) 22.a5a4 Rd6a6 23.Rf1g1 Rb8a8 24.Rg1f1 Qf1g2 25.Rg2g1+ Qd1f1 26.a4×Qb3(Qd1)! Qa2×Pb3(Pb7)+ (Oh, Circe! bPb3 is free and can come back to g7!!) 27.a6a5 Qb1a2 28.a7a6 Na2c1 29.a5a4 Qd1b1 30.Rg1×Qg2(Qd1) b7b8=R 31.Rf1g1 b6b7 32.Rg1f1 Qf1g2 33.Rg2g1+ Qd1f1 34.a6a5 Nf1h2 35.b7×Qa6(Qd1) ( bPs switch their places. After that it's long but easy.) 35. ... c5×Pb6(Pb7) 36.b7b6 Qa5×Pa6(Pa7) 37.a7a6 Qa4×Pa5(Pa7) 38.a6a5 Rb6d6 39.a7a6 Qa8×Pa4(Pa7) 40.a5a4 Qd8a8 41.a6a5 Qh4d8 42.a7a6 Ra6×Pb6(Pb7) 43.b7b6 Ra5×Pa6(Pa7) 44.a7a6 Ra4×Pa5(Pa7) 45.a6a5 Qh2h4 [46.a7a6 Ra6×Pa4(Pa7) 47.a5a4 Rb6a6 48.a6a5 Qg1h2 49.a7a6 Ra6×b6(Pb7) 50.b7b6 Ra5×Pa6(Pa7) 51.a7a6 Ra4×Pa5(Pa7)] 52.a6a5 Nh2f1 53.a7a6 Qd1g1 54.Rg1×Qg2(Qd1) Ra6×Pa4(Pa7) 55.Rf1g1 Ra6b6 56.Re1f1 Rg6×Pb6(Pb7) 57.Rg1e1 Qf1g2 58.Rg2g1+ Qd1f1 59.c7×Qb6(Qd1) Qf6b6 60.a5a4 Qh4f6 61.a6a5 Rc6g6 [62.a7a6 Ra6×Pc6(c7) 63.c7c6 Ra5×Pa6(a7) 64.a7a6 Ra4×Pa5(a7)] 65.a6a5 Nf1h2 [66.a7a6 Ra6×Pa4(a7) 67.a5a4 Rc6a6] 68.a6a5 Qh2h4 [69.a7a6 Ra6×Pc6(c7) 70.c7c6 Ra5×Pa6(a7) 71.a7a6 Ra4×Pa5(a7)] 72.a6a5 Qg1h2 [73.a7a6 Ra6×Pa4(a7) 74.a5a4 Rc6a6] 75.a6a5 Nh2f1 76.a7a6 Qd1g1 77.Rg1×Qg2(Qd1) Ra6×Pc6(Pc7) 78.Rf1g1 Ra5×Pa6(Pa7) 79.Rg1f1 Qf1g2 80.Rg2g1+ Qd1f1 81.d7×Qc6(Qd1) Qf6c6 82.a7a6 Ra4×Pa5(Pa7) 83.a6a5 Qh4f6 [84.a7a6 Ra6×Pa4(a7) 85.a5a4 Rd6a6] 86.a6a5 Nf1h2 [87.a7a6 Ra6×Pd6(d7) 88.d7d6 Ra5×Pa6(a7) 89.a7a6 Ra4×Pa5(a7)] 90.a6a5 Qh2h4 [91.a7a6 Ra6×Pa4(a7) 92.a5a4 Rd6a6] 93.a6a5 Qg1h2 [94.a7a6 Ra6×Pd6(d7) 95.d7d6 Ra5×Pa6(a7) 96.a7a6 Ra4×Pa5(a7)] 97.a6a5 Nh2f1 98.a7a6 Qd1g1 99.Rg1×Qg2(Qd1) Ra6×Pa4(Pa7) 100.Rf1g1 Ra6d6 101.Re1f1 Rg6×Pd6(Pd7) 102.Rg1e1 Qf1g2 103.Rg2g1+ Qd1f1 104.e7×Qd6(Qd1) Qe5d6 105.a5a4 Qe7×Pe5(Pe7) 106.e6e5 Qh4e7 107.e7e6 Nf1h2 108.a6a5 Re6g6 [109.a7a6 Ra6×Pe6(e7) 110.e7e6 Ra5×Pa6(a7) 111.a7a6 Ra4×Pa5(a7)] 112.a6a5 Qh2h4 [113.a7a6 Ra6×Pa4(a7) 114.a5a4 Re6a6] 115.a6a5 Qg1h2 [116.a7a6 Ra6×Pe6(e7) 117.e7e6 Ra5×Pa6(a7) 118.a7a6 Ra4×Pa5(a7)] 119.a6a5 Nh2f1 120.a7a6 Qd1g1 121.Rg1×Qg2(Qd1) Ra6×Pa4(Pa7) 122.Rf1g1 Re6a6 123.Re1f1 Rg6×Pe6(Pe7) 124.Rg1e1 Qf1g2 125.Rg2g1+ Qd1f1 126.f7×Qe6(Qd1) Qf6e6 127.a5a4 Qh4×Pf6(Pf7) 128.f7f6 Nf1h2 129.a6a5 Rf6g6 [130.a7a6 Ra6×Pf6(f7) 131.f7f6 Ra5×Pa6(a7) 132.a7a6 Ra4×Pa5(a7)] 133.a6a5 Qh2h4 [134.a7a6 Ra6×Pa4(a7) 135.a5a4 Rf6a6] 136.a6a5 Qg1h2 137.a7a6 Ra6×Pf6(Pf7) 138.f7f6 Ra5×Pa6(Pa7) 139.a7a6 Ra4×Pa5(Pa7) 140.a6a5 Nh2f1 141.a7a6 Ra6×Pa4(Pa7) 142.a5a4 Rf6a6 143.a6a5 Qd1g1 144.a7a6 Ra6×Pf6(Pf7) 145.g7×Qf6(Qd1) h3×Pg4(Pg7) 146.g5g4+ Kg4f3 etc...

Tries:

a) 1.Qd3×Re3# (one of the wR is promote) Na2 et retro pat

b) 1.Qd3×Pe3# (no promotion) N~ and retro pat

c) 1.Qd3×Be3# Na2 2.b×Pa6 N~ and retro pat

d) 1.Qd3×Be3# Nf1 2.b×Ba6 N~ and retro pat

e) 1.Qd3×Be3# Nf1 2.Rg1×(R, B, P)g2 Nh2 3.R~ Na2 4.R~ Nc1×Pa2(Pa7) 5.a7 and although the wQ and the R are free the wQ cannot return any more on d1.

6118 -

Phénix 194, Apr. 2010

10+12. SPG in 9.5 moves (C+)

[rnb1kbnr/pp3ppp/8/8/8/8/PPPP2PP/4KBNR]

Solution

1.f4 d5 2.f5 d4 3.f6 d3 4.f×e7 d×e2 5.e×d8=B e×d1=R+ 6.Ke2 R×c1 7.B×c7 R×b1 8.Bg3 R×a1 9.Be1 R×e1+ 10.K×e1

6119 -

Phénix 194, Apr. 2010

Dedicated to Neil & Ellie

11+15. SPG in 11.5 moves (C+)

[rnb2bnr/ppp1pppp/3k4/8/1PBP4/Bp6/P1P2PPP/R3K3]

Solution

1.Na3 d5 2.Nc4 d×c4 3.b4 Qd3 4.Ba3 Kd7 5.Qb1 Kd6 6.Qb3 c×b3 7.000 Q×e2 8.d4 Qe1 9.Bc4 Q×g1 10.Kd2 Q×h1 11.Ra1 Qe1+ 12.K×e1

6120 -

Phénix 194, Apr. 2010

13+11. SPG in 7.5 moves? (Loosing Chess) (2 solutions)

[rnbq1b2/pp1ppk2/8/2p5/1P2P3/8/P1PP1P1P/RNB2KNR]

Solution

a) 1.b4 h5 2.e4 h4 3.Qg4 h3 4.Q×g7 h×g2 5.Q×h8 g×f1=B 6.Q×g8 c5 7.Q×f7+ K×f7 8.K×f1

b) 1.g3 h5 2.e4 Nh6 3.Q×h5 Nf5 4.Q×h8 N×g3 5.Q×g7 N×f1 6.Q×f7+ K×f7 7.K×f1 c5 8.b4

6121 -

Phénix 194, Apr. 2010

13+13. SPG in 7.5 moves (4 CamelRiders (CR) replace Nights in the initial position)

[r1bq1rk1/pppppppp/8/5CR2/8/8/PPP2PPP/2BQKBCRR]

Solution

1.CRg1-h4 CRb8-c5 2.CRh4-e5 CRc5×d2 3.CRe5×f8 CRd2×a1 4.CRf8-e5 CRa1-d2 5.CRe5×d2 CRg8-f5 6.CRd2-g1 CRf5×e2 7.CR×e2 0-0 8.CRe2-f5

6122 -

Phénix 194, Apr. 2010

11+11. SPG in 14.0 moves (Special grid Chess (8 columns))

[2kr3r/1bp2ppp/pp6/4p3/8/2N1PP2/P1PP2PP/2KR3R]

Solution

1.Nf3 Nc6 2.Ne5 Nd4 3.N×d7 Nf3+ 4.e×f3 Nf6 5.N×f6+ e×f6 6.Qe2 Ba3 7.Qa6 B×b2 8.Qb6 a×b6 9.Ba6 b×a6 10.B×b2 Bb7 11.Be5 f×e5 12.Nc3 Qg5 13.0-0-0 Qe3 14.f×e3 0-0-0