MESON Chess Problem Database

Problem Display
PID: 138154 (2K2nnb/4k1P1/2Q5/2N4R/8/8/8/8 w - - 0 1)

Nesic, Milivoj S

Vecherni Novosti, 1961

2K2nnb/4k1P1/2Q5/2N4R/8/8/8/8

#2

5 + 4

6490 yacpdb 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Se6
      • 2.Qxe6#
    • 1...Sg6
      • 2.Qe6#
    • 1...Sd7
      • 2.Qe6#
    • 1...Sh7
      • 2.Qe6#
  • Tries
    • 1.Re5+?
      • 1...Se6
        • 2.Qxe6#
      • 1...Kf7!
    • 1.Rxh8?
      • 1...Se6
        • 2.Qxe6#
      • 1...Sd7
        • 2.Qe6#
      • 1...Sg6
        • 2.Qe6#
      • 1...Sh7
        • 2.Qe6#
      • 1...Sf6
        • 2.gxf8Q#
      • 1...Sh6
        • 2.gxf8Q#
      • 1...Kf7!
    • 1.Qe4+?
      • 1...Kd6
        • 2.Sb7#
      • 1...Kf6
        • 2.gxf8Q#
      • 1...Se6
        • 2.Qxe6#
      • 1...Kf7!
    • 1.Qe8+?
      • 1...Kd6
        • 2.Se4#
        • 2.Sb7#
      • 1...Kf6
        • 2.gxf8Q#
        • 2.gxh8Q#
        • 2.gxh8B#
      • 1...Kxe8!
    • 1.Qd6+?
      • 1...Kf7
        • 2.gxf8Q#
      • 1...Ke8
        • 2.Qxf8#
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...Kxd6!
  • Keys
    • 1.Rh7!
      • 1...Kf7
        • 2.gxh8S#
      • 1...Bxg7
        • 2.Rxg7#
      • 1...Sxh7
        • 2.Qe6#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sd7
        • 2.Qe6#
      • 1...Sg6
        • 2.Qe6#
      • 1...Sf6
        • 2.g8S#
      • 1...Sh6
        • 2.g8S#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::QAR1(C),XS(b)
    • S(b);N_GUARD::QAR1(C)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAR1(C),XS(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(B);XB(d)
      • Vars
        • S(b);N_GUARD::QAR1(C),XS(b)
        • S(b);N_GUARD::QAR1(C)
        • S(c);::PXS(b)=Q
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);S_FLIGHT::S(A)
        • K(a);S_FLIGHT::PXS(b)=Q
        • S(b);N_GUARD,P_SPINS(b)::QAR1(C),XS(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::PXS(b)=Q
      • Refutation
        • K(a);S_FLIGHT,XQ(C)
  • Actual
    • R(B);
    • Vars
      • K(a);P-FLIGHT::PXB(d)=S
      • B(d);OGATE,P_SPINB(d),XP(D)::R(B),XB(d)
      • S(b);N_GUARD,XR(B)::QAR1(C)
      • S(b);N_GUARD::QAR1(C),XS(b)
      • S(b);N_GUARD::QAR1(C)
      • S(c);OGATE::P=S
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