MESON Chess Problem Database

Problem Display
PID: 135884 (B2b4/1PRPNPRn/p2k1p2/qp1P1P2/Np1Q4/8/7K/8 w - - 0 1)

Robert, Philippe

Prize, Spisska Borovicka, 2009

B2b4/1PRPNPRn/p2k1p2/qp1P1P2/Np1Q4/8/7K/8

#2

12 + 8

114 Springaren 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe7
      • 2.Qc5#
  • Tries
    • 1.b8Q?
      • threat
        • 2.Sc8#
      • 1...Kxe7
        • 2.Qc5#
      • 1...Bxc7
        • 2.d8Q#
      • 1...Bxe7
        • 2.Qf4#
      • 1...Qxc7!
    • 1.b8B?
      • threat
        • 2.Sc8#
      • 1...Kxe7
        • 2.Qc5#
      • 1...Bxc7
        • 2.d8Q#
      • 1...Bxe7
        • 2.Qf4#
      • 1...Qxc7!
    • 1.f8Q?
      • threat
        • 2.Qf4#
      • 1...Qxc7
        • 2.Sc8#
      • 1...Bxc7
        • 2.Sc8#
      • 1...Bxe7
        • 2.d8Q#
      • 1...Kxc7!
    • 1.f8B?
      • threat
        • 2.Qf4#
      • 1...Qxc7
        • 2.Sc8#
      • 1...Bxc7
        • 2.Sc8#
      • 1...Bxe7
        • 2.d8Q#
      • 1...Kxc7!
  • Keys
    • 1.f8S!
      • threat
        • 2.Rc6#
        • 2.Qf4#
      • 1...Kxc7
        • 2.Qf4#
      • 1...Qxc7
        • 2.Qf4#
      • 1...Bxc7
        • 2.Sc8#
        • 2.Qf4#
      • 1...Bxe7
        • 2.Rc6#
      • 1...Sxf8
        • 2.Qf4#
      • 1...Qb6
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • K(e);S_FLIGHT,XS(I)::QAB(C)
  • Tries
    • Try
      • P(F);
      • Threat
        • S(I)
      • Vars
        • K(e);S_FLIGHT,XS(I)::QAB(C)
        • B(h);OGATE,P_SPINB(h),XR(G)::P=Q
        • B(h);SBLOCK,XS(I)::QAB(C)
      • Refutation
        • Q(b);P_SPINQ(b),XR(G)
    • Try
      • P(F);
      • Threat
        • S(I)
      • Vars
        • K(e);S_FLIGHT,XS(I)::QAB(C)
        • B(h);OGATE,P_SPINB(h),XR(G)::P=Q
        • B(h);SBLOCK,XS(I)::QAB(C)
      • Refutation
        • Q(b);P_SPINQ(b),XR(G)
    • Try
      • P(J);
      • Threat
        • QAB(C)
      • Vars
        • Q(b);SBLOCK,XR(G)::QAB(J)+S(I),DCHECK
        • B(h);SBLOCK,XR(G)::QAB(J)+S(I),DCHECK
        • B(h);OGATE,P_SPINB(h),XS(I)::P=Q
      • Refutation
        • K(e);S_FLIGHT,XR(G)
    • Try
      • P(J);
      • Threat
        • QAB(C)
      • Vars
        • Q(b);SBLOCK,XR(G)::B(J)+S(I),DCHECK
        • B(h);SBLOCK,XR(G)::B(J)+S(I),DCHECK
        • B(h);OGATE,P_SPINB(h),XS(I)::P=Q
      • Refutation
        • K(e);S_FLIGHT,XR(G)
  • Actual
    • P(J);
    • Threat
      • DUALS(2)
    • Vars
      • K(e);S_FLIGHT,XR(G)::QAB(C)
      • Q(b);SBLOCK,XR(G)::QAB(C)
      • B(h);XS(I)::R1(G)
      • S(g);XS(J)::QAB(C)
      • Q(b);::QAB(C)
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