MESON Chess Problem Database

Problem Display
PID: 146991 (2KnR3/Q1p2kN1/1P1p4/1N1P4/1b2P3/3p4/3P2R1/B1r5 w - - 0 1)

Ling, John Francis

Chess, 1955

2KnR3/Q1p2kN1/1P1p4/1N1P4/1b2P3/3p4/3P2R1/B1r5

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Qxc7#
    • 1...Rd1
      • 2.Qxc7#
    • 1...Re1
      • 2.Qxc7#
    • 1...Rf1
      • 2.Qxc7#
    • 1...Rg1
      • 2.Qxc7#
    • 1...Rh1
      • 2.Qxc7#
    • 1...Rc5
      • 2.Sxd6#
    • 1...Bxd2
      • 2.Sxd6#
    • 1...Ba5
      • 2.Sxd6#
    • 1...Bc5
      • 2.Qxc7#
    • 1...Se6
      • 2.dxe6#
  • Keys
    • 1.bxc7!
      • threat
        • 2.Qf2#
      • 1...Rxc7+
        • 2.Qxc7#
      • 1...Bxd2
        • 2.Sxd6#
      • 1...Bc3
        • 2.cxd8Q#
        • 2.cxd8B#
      • 1...Rf1
        • 2.cxd8Q#
        • 2.cxd8S#
        • 2.cxd8B#
        • 2.cxd8R#
      • 1...Rc5
        • 2.Sxd6#
      • 1...Bc5
        • 2.cxd8S#
      • 1...Se6
        • 2.dxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • R(a);N_GUARD::QAR(H),XP(e)
    • R(a);S_CUTB(c)::S(E),XP(d)
    • B(c);N_GUARD,XP(B)::S(E),XP(d)
    • B(c);N_GUARD::S(E),XP(d)
    • B(c);S_CUTR(a)::QAR(H),XP(e)
    • S(g);OGATE::P(F),XS(g)
  • Actual
    • P(G);P_SPINP(G),XP(e)
    • Threat
      • QAR(H)
    • Vars
      • R(a);CHECK,OGATE,P_SPINR(a),XP(G)::QAR(H),XR(a)
      • B(c);N_GUARD,XP(B)::S(E),XP(d)
      • B(c);N_PINP(G)::PXS(g)=Q
      • R(a);S_CUTB(c)::S(E),XP(d)
      • B(c);N_PINP(G)::PXS(g)=S
      • S(g);OGATE::P(F),XS(g)
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