MESON Chess Problem Database

Problem Display
PID: 261972 (2rnn3/RP1Pk1P1/R1b1Pb2/Bp1pP3/5p2/8/2Q5/2K5 w - - 0 1)

Knuppert, Hugo

Larsen, Lars Aksglade (= Aksglade, Lars)

3rd Prize, Problemnoter, 1961

2rnn3/RP1Pk1P1/R1b1Pb2/Bp1pP3/5p2/8/2Q5/2K5

#2

10 + 9

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bxb7
      • 2.dxc8S#
    • 1...Bxd7
      • 2.bxc8S#
  • Tries
    • 1.Qc5+?
      • 1...Sd6
        • 2.Qxd6#
      • 1...Kxe6!
    • 1.dxe8Q+?
      • 1...Bxe8
        • 2.bxc8S#
      • 1...Kxe8!
    • 1.dxe8R+?
      • 1...Bxe8
        • 2.bxc8S#
      • 1...Kxe8!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qxe8#
      • 1...Bxb7+
        • 2.dxc8S#
      • 1...Bxd7+
        • 2.bxc8S#
      • 1...Kxe6
        • 2.dxe8Q#
      • 1...Bxe5
        • 2.bxc8S#
        • 2.dxc8S#
      • 1...Sxe6
        • 2.bxc8S#
      • 1...Sxb7
        • 2.Qf7#
      • 1...Sxg7
        • 2.Qxf6#
      • 1...Sf7
        • 2.Qxf7#
      • 1...Sd6
        • 2.Qxf6#
      • 1...Sc7
        • 2.Qxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • B(d);P_PINQ(B),XP(H)::PXR(g)=S
    • B(d);P_PINQ(B),XP(I)::PXR(g)=S
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • S(i);N_GUARD,P_SPINS(i)::QAB1(B),XS(i)
      • Refutation
        • K(f);P-FLIGHT,P_SPINB(d),XP(F)
    • Try
      • P(I);CHECK,XS(i)
      • Vars
        • B(d);P_PINQ(B),SBLOCK,XQ(I)::PXR(g)=S
      • Refutation
        • K(f);P-FLIGHT,XQ(I)
    • Try
      • P(I);CHECK,XS(i)
      • Vars
        • B(d);P_PINQ(B),SBLOCK,XR(I)::PXR(g)=S
      • Refutation
        • K(f);P-FLIGHT,XR(I)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B),XS(i)
    • Vars
      • B(d);CHECK,XP(H)::PXR(g)=S
      • B(d);CHECK,XP(I)::PXR(g)=S
      • K(f);P-FLIGHT,P_SPINB(d),XP(F)::PXS(i)=Q
      • S(h);SBLOCK,XP(F)::PXR(g)=S
      • S(h);N_GUARD,XP(H)::QAR1(B)
      • S(i);N_GUARD,XP(J)::QAB1(B),XB(e)
      • S(h);N_GUARD::QAR1(B),XS(h)
      • S(i);N_GUARD::QAB1(B),XB(e)
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