MESON Chess Problem Database

Problem Display
PID: 238781 (1r6/3N1BP1/6QK/3P2p1/3kN3/3p4/1n1P3p/2R3bb w - - 0 1)

Janevski, Zivko

Comm., Pat a Mat, 2006

1r6/3N1BP1/6QK/3P2p1/3kN3/3p4/1n1P3p/2R3bb

#2

9 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rh8+
      • 2.gxh8Q#
      • 2.gxh8B#
    • 1...Bxe4
      • 2.Qf6#
  • Tries
    • 1.Sf2?
      • threat
        • 2.Qf6#
      • 1...Rh8+
        • 2.gxh8Q#
        • 2.gxh8B#
      • 1...Rb6
        • 2.Qxb6#
      • 1...Re8
        • 2.Qb6#
      • 1...Sc4
        • 2.Qxd3#
      • 1...Bxf2!
    • 1.Sg3?
      • threat
        • 2.Qf6#
      • 1...Rh8+
        • 2.gxh8Q#
        • 2.gxh8B#
      • 1...Rb6
        • 2.Qxb6#
      • 1...Re8
        • 2.Qb6#
      • 1...Sc4!
    • 1.Sec5?
      • threat
        • 2.Qf6#
      • 1...Rh8+
        • 2.gxh8Q#
        • 2.gxh8B#
      • 1...Re8
        • 2.Sb3#
      • 1...Sc4
        • 2.Qxd3#
      • 1...Rb6!
    • 1.Sxg5?
      • threat
        • 2.Qf6#
      • 1...Rh8+
        • 2.gxh8Q#
        • 2.gxh8B#
      • 1...Rb6
        • 2.Qxb6#
      • 1...Re8
        • 2.Qb6#
      • 1...Sc4!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Qf6#
      • 1...Rh8+
        • 2.gxh8Q#
        • 2.gxh8B#
      • 1...Re8
        • 2.Sb5#
      • 1...Sc4
        • 2.Rxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(h);CHECK,OGATE::PXR(h)=Q
    • B(b);SBLOCK,XS(C)::QAB(E)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB(E)
      • Vars
        • R(h);CHECK,OGATE::PXR(h)=Q
        • R(h);N_GUARD,P_PINQ(E)::QAB(E),XR(h)
        • R(h);N_GUARD::QAB(E)
        • S(c);N_GUARD::QAR1(E),XP(e)
      • Refutation
        • B(a);XS(C)
    • Try
      • S(C);
      • Threat
        • QAB(E)
      • Vars
        • R(h);CHECK,OGATE::PXR(h)=Q
        • R(h);N_GUARD,P_PINQ(E)::QAB(E),XR(h)
        • R(h);N_GUARD::QAB(E)
      • Refutation
        • S(c);
    • Try
      • S(C);
      • Threat
        • QAB(E)
      • Vars
        • R(h);CHECK,OGATE::PXR(h)=Q
        • R(h);N_GUARD::S(C)
        • S(c);N_GUARD::QAR1(E),XP(e)
      • Refutation
        • R(h);P_PINQ(E)
    • Try
      • S(C);XP(g)
      • Threat
        • QAB(E)
      • Vars
        • R(h);CHECK,OGATE::PXR(h)=Q
        • R(h);N_GUARD,P_PINQ(E)::QAB(E),XR(h)
        • R(h);N_GUARD::QAB(E)
      • Refutation
        • S(c);
  • Actual
    • S(C);
    • Threat
      • QAB(E)
    • Vars
      • R(h);CHECK,OGATE::PXR(h)=Q
      • R(h);N_GUARD::S(C)
      • S(c);N_GUARD::R1(A),XS(c)
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