MESON Chess Problem Database

Problem Display
PID: 18365 (1rk1N3/R2b1n2/1Bppq3/K1RN3r/6Q1/4p3/8/8 w - - 0 1)

Ruppin, Raffi

1st Prize, Israel Ring Ty., 1955

1rk1N3/R2b1n2/1Bppq3/K1RN3r/6Q1/4p3/8/8

#2

7 + 9

3841 The Art of Israeli Chess Composition 1983
14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg4
      • 2.Se7#
    • 1...Qxd5
      • 2.Qxd7#
    • 1...Qf5
      • 2.Se7#
    • 1...Qe4
      • 2.Rxc6#
      • 2.Qxd7#
    • 1...Qe5
      • 2.Rxc6#
      • 2.Qxd7#
    • 1...Qf6
      • 2.Rxc6#
      • 2.Qxd7#
    • 1...Qg6
      • 2.Se7#
      • 2.Rxc6#
      • 2.Qxd7#
    • 1...Qh6
      • 2.Se7#
      • 2.Rxc6#
      • 2.Qxd7#
    • 1...Qe7
      • 2.Sxe7#
      • 2.Rxc6#
    • 1...Qxe8
      • 2.Rxc6#
    • 1...Bxe8
      • 2.Se7#
    • 1...Sd8
      • 2.Rc7#
  • Keys
    • 1.Qg8!
      • threat
        • 2.Sxd6#
      • 1...Qxe8
        • 2.Se7#
      • 1...Bxe8
        • 2.Rxc6#
      • 1...dxc5
        • 2.Sd6#
      • 1...Sd8
        • 2.Rc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • Q(e);N_GUARD,XQ(A)::S(D)
    • Q(e);OGATE,P_PINR(C),P_SPINB(f),XS(D)::QAB1(A),XB(f)
    • Q(e);N_GUARD::S(D)
    • Q(e);P_SPINB(f),XS(G)::R(C),XP(c)
    • B(f);P_SPINQ(e),XS(G)::S(D)
    • S(g);SBLOCK::R1(F)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)+S(G),DCHECK,XP(d)
    • Vars
      • Q(e);N_GUARD,P_SPINQ(e),XS(G)::S(D)
      • B(f);N_GUARD,P_SPINB(f),XS(G)::R(C),XP(c)
      • P(d);N_SPINP(c),XR(C)::QAR(A)+S(G),DCHECK
      • S(g);SBLOCK::R1(F)
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