MESON Chess Problem Database

Problem Display
PID: 136821 (4nRnN/K4P1r/1p3k2/3Q1N1p/8/b7/3B4/8 w - - 0 1)

Groeneveld, Cornelis

L'Italia Scacchistica, 2001

4nRnN/K4P1r/1p3k2/3Q1N1p/8/b7/3B4/8

#2

7 + 7

6490 yacpdb 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Rh6
      • 2.fxe8S#
      • 2.fxg8S#
    • 1...Rxf7+
      • 2.Rxf7#
    • 1...Be7
      • 2.fxe8S#
      • 2.fxg8S#
    • 1...Sc7
      • 2.fxg8S#
    • 1...Sg7
      • 2.fxg8S#
    • 1...Se7
      • 2.fxe8S#
  • Tries
    • 1.Sg7?
      • threat
        • 2.Qg5#
      • 1...Ke7
        • 2.fxe8Q#
        • 2.fxe8R#
      • 1...Kxg7
        • 2.fxg8Q#
        • 2.fxg8R#
      • 1...Sxg7
        • 2.Bg5#
        • 2.fxg8S#
      • 1...Rxg7!
    • 1.Rxe8?
      • threat
        • 2.Re6#
        • 2.Qe6#
        • 2.Qe5#
      • 1...Rxf7+
        • 2.Qxf7#
      • 1...Rxh8
        • 2.Qe6#
      • 1...Bb2
        • 2.Re6#
        • 2.Qe6#
      • 1...Bd6
        • 2.Re6#
        • 2.Qe6#
      • 1...Be7
        • 2.fxg8S#
      • 1...Se7!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Qg5#
      • 1...Rxf7+
        • 2.Rxf7#
      • 1...Ke7
        • 2.fxe8Q#
        • 2.fxe8R#
      • 1...Kg7
        • 2.fxg8Q#
        • 2.fxg8R#
      • 1...Rg7
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(e);CHECK,OGATE,P_SPINR(e),XP(E)::R1(F),XR(e)
    • S(f);N_PINP(E)::PXS(g)=S
    • S(g);N_PINP(E)::PXS(f)=S
  • Tries
    • Try
      • S(C);N_SPINP(E)
      • Threat
        • QAB1(B)
      • Vars
        • K(d);S_FLIGHT::PXS(f)=Q
        • K(d);S_FLIGHT,XS(C)::PXS(g)=Q
      • Refutation
        • R(e);P_PINP(E),XS(C)
    • Try
      • R(F);XS(f)
      • Threat
        • DUALS(3)
      • Vars
        • R(e);CHECK,OGATE,XP(E)::QAR1(B),XR(e)
        • R(e);N_PINP(E),XS(G)::QAR1(B)
        • B(a);N_PINP(E)::PXS(g)=S
      • Refutation
        • S(g);N_PINP(E)
  • Actual
    • S(C);
    • Threat
      • QAB1(B)
    • Vars
      • R(e);CHECK,OGATE,P_SPINR(e),XP(E)::R1(F),XR(e)
      • K(d);N_PINP(E),S_FLIGHT::PXS(f)=Q
      • K(d);N_PINP(E),S_FLIGHT::PXS(g)=Q
      • R(e);SBLOCK::QAR1(B)
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