MESON Chess Problem Database

Problem Display
PID: 273127 (Q2Br2N/Np1P4/q1pnk2r/2P4b/2PRpR2/pB6/K7/8 w - - 0 1)

Subrahmanyam, Swaminatha

The Problemist, 1931

Q2Br2N/Np1P4/q1pnk2r/2P4b/2PRpR2/pB6/K7/8

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd7
      • 2.Qc8#
    • 1...Sf5
      • 2.Rfxe4#
    • 1...Sf7
      • 2.dxe8Q#
      • 2.dxe8R#
  • Keys
    • 1.Qb8!
      • threat
        • 2.Qxd6#
      • 1...Ke5
        • 2.Rdxe4#
      • 1...Kxd7
        • 2.Qc8#
      • 1...Sxc4
        • 2.Qd6#
      • 1...Sb5
        • 2.cxb5#
      • 1...Sf5
        • 2.Rfxe4#
      • 1...Sf7
        • 2.dxe8Q#
        • 2.dxe8R#
      • 1...Sc8
        • 2.dxc8Q#
        • 2.dxc8B#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(g);OGATEB,P_SPINS(f),S_FLIGHT,XP(H)::QAB1(I)
    • S(f);N_GUARD,SBLOCK::R(E),XP(b)
    • S(f);N_GUARD,S_CUTB(c)::PXR(j)=Q
  • Actual
    • Q(I);
    • Threat
      • QAR1(I),XS(f)
    • Vars
      • K(g);N_GUARD,P-FLIGHT,P_SPINS(f)::R1(D),XP(b)
      • K(g);OGATEB,P_SPINS(f),S_FLIGHT,XP(H)::QAB1(I)
      • S(f);P_SPINS(f),XP(C)::QAR1(I)
      • S(f);OGATE::B(B)+P(C),XS(f)
      • S(f);N_GUARD,SBLOCK::R(E),XP(b)
      • S(f);N_GUARD,S_CUTB(c)::PXR(j)=Q
      • S(f);OGATE::PXS(f)=Q
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