MESON Chess Problem Database

Problem Display
PID: 161185 (K7/ppQ1P2P/3rkrBN/Rb2PnR1/3nPp2/8/1B6/8 w - - 0 1)

Helbig, J

Joseph, Fernand

1st Prize, Probleemblad 136. TT, 1977

K7/ppQ1P2P/3rkrBN/Rb2PnR1/3nPp2/8/1B6/8

#2

11 + 9

15611 Schaak-composities 1975-1979 (de Vuyst) 1982

SOLUTION

  • SOUND
  • Sets
    • 1...Rd8+
      • 2.exd8S#
    • 1...Se3
      • 2.Qxd6#
    • 1...Sg3
      • 2.Qxd6#
    • 1...Sh4
      • 2.Qxd6#
    • 1...Sxh6
      • 2.Qxd6#
    • 1...Sxe7
      • 2.Qxd6#
    • 1...Sg7
      • 2.Qxd6#
  • Tries
    • 1.Bxf5+?
      • 1...Kxe5
        • 2.Sg4#
        • 2.Rxb5#
      • 1...Rxf5
        • 2.Qxd6#
      • 1...Sxf5!
    • 1.e8Q+?
      • 1...Se7
        • 2.Qxd6#
        • 2.Qcxe7#
        • 2.Qexe7#
      • 1...Bxe8!
    • 1.e8R+?
      • 1...Se7
        • 2.Rxe7#
        • 2.Qxd6#
        • 2.Qxe7#
      • 1...Bxe8!
  • Keys
    • 1.h8Q!
      • threat
        • 2.Qxf6#
      • 1...Rd8+
        • 2.exd8S#
      • 1...Rf8+
        • 2.exf8S#
      • 1...Kxe5
        • 2.e8Q#
        • 2.e8R#
      • 1...Rxg6
        • 2.Rxg6#
      • 1...Rf7
        • 2.Bxf7#
      • 1...Sg7
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(e);CHECK,OGATE::PXR(e)=S
    • S(d);N_GUARD::QAR1(H),XR(e)
    • S(d);N_GUARD,XS(G)::QAR1(H),XR(e)
    • S(d);N_GUARD,XP(I)::QAR1(H),XR(e)
  • Tries
    • Try
      • B(F);CHECK,XS(d)
      • Vars
        • R(g);XB(F)::QAR1(H),XR(e)
      • Refutation
        • S(a);XB(F)
    • Try
      • P(I);CHECK
      • Refutation
        • B(c);XQ(I)
    • Try
      • P(I);CHECK
      • Refutation
        • B(c);XR(I)
  • Actual
    • P(J);
    • Threat
      • QAR1(J),XR(g)
    • Vars
      • R(e);CHECK,OGATE::PXR(e)=S
      • R(g);CHECK,OGATE::PXR(g)=S
      • K(f);P-FLIGHT,P_SPINB(c),P_SPINR(e),P_SPINS(a),XP(D)::P=Q
      • R(g);OGATE,XB(F)::R(E),XR(g)
      • R(g);N_GUARD::B(F),XR(g)
      • S(d);N_GUARD::QAR1(H),XR(e)
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