MESON Chess Problem Database

Problem Display
PID: 264081 (3BB1r1/RnP4b/1p2kP2/1Nr5/3KP3/8/8/5Q2 w - - 0 1)

Szilagyi, Gabor

Tijdschrift vd KNSB, 1959

3BB1r1/RnP4b/1p2kP2/1Nr5/3KP3/8/8/5Q2

#2

9 + 6

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4+
      • 2.Qxc4#
    • 1...Rd5+
      • 2.exd5#
    • 1...Re5
      • 2.c8Q#
      • 2.c8B#
    • 1...Rf5
      • 2.c8Q#
      • 2.c8B#
    • 1...Rcg5
      • 2.c8Q#
      • 2.c8B#
    • 1...Rh5
      • 2.c8Q#
      • 2.c8B#
    • 1...Sxd8
      • 2.cxd8S#
  • Tries
    • 1.Qc4+?
      • 1...Rd5+
        • 2.Qxd5#
      • 1...Rxc4+!
    • 1.Qf5+?
      • 1...Rxf5
        • 2.c8Q#
        • 2.c8B#
      • 1...Bxf5!
  • Keys
    • 1.f7!
      • threat
        • 2.Qf6#
      • 1...Rc4+
        • 2.Qxc4#
      • 1...Rd5+
        • 2.exd5#
      • 1...Rxe8
        • 2.fxe8Q#
      • 1...Sxd8
        • 2.cxd8S#
      • 1...Rf5
        • 2.c8Q#
        • 2.c8B#
      • 1...Rg6
        • 2.f8S#
      • 1...Bf5
        • 2.fxg8Q#
        • 2.fxg8B#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(a);CHECK,N_GUARD::QAB(A),XR(a)
    • R(a);CHECK,OGATE::P(C),XR(a)
    • R(a);N_GUARD::P=Q
    • S(d);OGATE,XB(H)::PXS(d)=S
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • R(a);CHECK,N_GUARD,P_SPINR(a)::QAB1(A),XR(a)
      • Refutation
        • R(a);CHECK,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • R(a);XQ(A)::P=Q
      • Refutation
        • B(e);XQ(A)
  • Actual
    • P(E);
    • Threat
      • QAR1(A)
    • Vars
      • R(a);CHECK,N_GUARD::QAB(A),XR(a)
      • R(a);CHECK,OGATE::P(C),XR(a)
      • R(f);OGATE,XB(I)::PXR(f)=Q
      • S(d);OGATE,XB(H)::PXS(d)=S
      • R(a);N_GUARD::P=Q
      • R(f);N_GUARD::P=S
      • B(e);N_GUARD::PXR(f)=Q
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