MESON Chess Problem Database

Problem Display
PID: 139789 (b1n1N3/rk1PR3/8/r1pNQ2K/P2B4/2R5/8/8 w - - 0 1)

Radomirovic, Miodrag

Mat Plus, 1998

b1n1N3/rk1PR3/8/r1pNQ2K/P2B4/2R5/8/8

#2

9 + 6

6490 yacpdb 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.d8S#
    • 1...R5a6
      • 2.Qc7#
      • 2.d8S#
    • 1...R7a6
      • 2.Qc7#
      • 2.d8S#
    • 1...cxd4
      • 2.dxc8Q#
      • 2.dxc8B#
  • Tries
    • 1.Re6?
      • threat
        • 2.Qc7#
        • 2.d8S#
      • 1...R7a6
        • 2.Qc7#
      • 1...Sb6
        • 2.Rxb6#
      • 1...Se7
        • 2.Rb6#
        • 2.Qc7#
      • 1...Sd6!
    • 1.Qd6?
      • threat
        • 2.d8S#
      • 1...Sxe7
        • 2.Qb6#
      • 1...Sb6
        • 2.Qxb6#
      • 1...Sxd6!
    • 1.Qe6?
      • threat
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Kb8
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Rxa4
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Sxe7
        • 2.Qb6#
      • 1...cxd4
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...R7a6
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Sb6
        • 2.Qxb6#
      • 1...Rb5
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...R5a6
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...c4
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Sd6!
    • 1.dxc8S+?
      • 1...Ka6
        • 2.Rxa7#
      • 1...Kc6
        • 2.Sb4#
        • 2.Qd6#
        • 2.Qe6#
      • 1...Kxc8!
    • 1.dxc8B+?
      • 1...Kc6
        • 2.Re6#
        • 2.Qd6#
        • 2.Qe6#
      • 1...Kxc8!
  • Keys
    • 1.Sb4!
      • threat
        • 2.Qc7#
      • 1...Kb6
        • 2.dxc8S#
      • 1...cxb4
        • 2.dxc8Q#
        • 2.dxc8B#
      • 1...cxd4
        • 2.dxc8S#
      • 1...Sd6
        • 2.d8Q#
      • 1...c4
        • 2.d8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(d);P_SPINP(b),S_FLIGHT::P=S
    • P(b);XB(C)::PXS(f)=Q
  • Tries
    • Try
      • R(H);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);::QAR1(E)
        • S(f);N_GUARD::R1(H),XS(f)
      • Refutation
        • S(f);
    • Try
      • Q(E);
      • Threat
        • P=S
      • Vars
        • S(f);N_GUARD,XR(H)::QAR1(E)
        • S(f);N_GUARD::QAR1(E),XS(f)
      • Refutation
        • S(f);XQ(E)
    • Try
      • Q(E);
      • Threat
        • PXS(f)=Q
      • Vars
        • K(d);P-FLIGHT::PXS(f)=Q
        • R(a);XP(B)::PXS(f)=Q
        • S(f);N_GUARD,XR(H)::QAR1(E)
        • P(b);P_PINS(D),XB(C)::PXS(f)=Q
        • R(c);::PXS(f)=Q
        • S(f);N_GUARD::QAR1(E),XS(f)
        • R(a);::PXS(f)=Q
        • P(b);P_PINS(D)::PXS(f)=Q
      • Refutation
        • S(f);
    • Try
      • P(G);CHECK,XS(f)
      • Vars
        • K(d);OGATE,S_FLIGHT::R1(H),XR(c)
      • Refutation
        • K(d);P_SPINP(b),S_FLIGHT,XS(G)
    • Try
      • P(G);CHECK,XS(f)
      • Refutation
        • K(d);P_SPINP(b),S_FLIGHT,XB(G)
  • Actual
    • S(D);
    • Threat
      • QAR1(E)
    • Vars
      • K(d);P-FLIGHT,P_SPINP(b)::PXS(f)=S
      • P(b);P_PINQ(E),XS(D)::PXS(f)=Q
      • P(b);P_PINQ(E),XB(C)::PXS(f)=S
      • S(f);N_GUARD::P=Q
      • P(b);P_PINQ(E)::P=S
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