MESON Chess Problem Database

Problem Display
PID: 181933 (r2k4/2NPr1P1/8/PQ2p3/4K3/7B/8/3R4 w - - 0 1)

Greenwood, William M

British Chess Magazine, 1912

r2k4/2NPr1P1/8/PQ2p3/4K3/7B/8/3R4

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc7
      • 2.Qb6#
    • 1...Rxd7
      • 2.Qxd7#
    • 1...Rxa5
      • 2.Qb8#
    • 1...Ra6
      • 2.Qb8#
    • 1...Ra7
      • 2.Qb8#
    • 1...Rb8
      • 2.Qxb8#
    • 1...Rc8
      • 2.dxc8Q#
      • 2.dxc8R#
  • Tries
    • 1.Sd5?
      • threat
        • 2.Qb6#
      • 1...Rxd7
        • 2.Qxd7#
        • 2.g8Q#
        • 2.g8R#
      • 1...Ra6
        • 2.Qb8#
      • 1...Ra7
        • 2.Qb8#
      • 1...Rb8
        • 2.Qxb8#
      • 1...Rc8
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Re6!
    • 1.Qb4?
      • 1...Kxc7
        • 2.Qb6#
      • 1...Rxg7
        • 2.Se6#
      • 1...Rxa5
        • 2.Qb8#
      • 1...Re6
        • 2.Sxe6#
      • 1...Rf7
        • 2.Se6#
      • 1...Re8
        • 2.dxe8S#
      • 1...Ra6
        • 2.Qb8#
      • 1...Ra7
        • 2.Qb8#
      • 1...Rb8
        • 2.Qxb8#
      • 1...Rc8
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Rxd7!
    • 1.g8Q+?
      • 1...Kxc7
        • 2.Qb6#
      • 1...Re8!
    • 1.g8R+?
      • 1...Kxc7
        • 2.Qb6#
      • 1...Re8!
  • Keys
    • 1.g8S!
      • 1...Kxc7
        • 2.Qb6#
      • 1...Rxd7
        • 2.Qxd7#
      • 1...Rxa5
        • 2.Qb8#
      • 1...Re6
        • 2.Sxe6#
      • 1...Rf7
        • 2.Se6#
      • 1...Rg7
        • 2.Se6#
      • 1...Rh7
        • 2.Se6#
      • 1...Re8
        • 2.dxe8S#
      • 1...Ra6
        • 2.Qb8#
      • 1...Ra7
        • 2.Qb8#
      • 1...Rb8
        • 2.Qxb8#
      • 1...Rc8
        • 2.dxc8Q#
        • 2.dxc8R#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(d);OGATEB,S_FLIGHT,XS(F)::QAB1(E)
    • R(b);OGATE,P_SPINR(b),XP(G)::QAR1(E),XR(b)
    • R(c);N_GUARD,XP(D)::QAR2(E)
    • R(c);N_GUARD::QAR2(E)
    • R(c);N_GUARD::QAR2(E),XR(c)
    • R(c);OGATE::PXR(c)=Q
  • Tries
    • Try
      • S(F);
      • Threat
        • QAB(E)
      • Vars
        • R(c);N_GUARD::QAR2(E)
        • R(c);N_GUARD::QAR2(E),XR(c)
        • R(c);OGATE::PXR(c)=Q
      • Refutation
        • R(b);
    • Try
      • Q(E);
      • Vars
        • K(d);OGATEB,S_FLIGHT,XS(F)::QAB1(E)
        • R(b);N_GUARD,XP(H)::S(F)
        • R(c);N_GUARD,XP(D)::QAR2(E)
        • R(b);N_GUARD::S(F),XR(b)
        • R(b);N_GUARD::S(F)
        • R(b);OGATE::PXR(b)=S
        • R(c);N_GUARD::QAR2(E)
        • R(c);N_GUARD::QAR2(E),XR(c)
        • R(c);OGATE::PXR(c)=Q
      • Refutation
        • R(b);P_SPINR(b),XP(G)
    • Try
      • P(H);CHECK
      • Vars
        • K(d);S_FLIGHT,XS(F)::QAB1(E)
      • Refutation
        • R(b);P_SPINR(b)
    • Try
      • P(H);CHECK
      • Vars
        • K(d);S_FLIGHT,XS(F)::QAB1(E)
      • Refutation
        • R(b);P_SPINR(b)
  • Actual
    • P(H);
    • Vars
      • K(d);OGATEB,S_FLIGHT,XS(F)::QAB1(E)
      • R(b);OGATE,P_SPINR(b),XP(G)::QAR1(E),XR(b)
      • R(c);N_GUARD,XP(D)::QAR2(E)
      • R(b);N_GUARD::S(F),XR(b)
      • R(b);N_GUARD::S(F)
      • R(b);OGATE::PXR(b)=S
      • R(c);N_GUARD::QAR2(E)
      • R(c);N_GUARD::QAR2(E),XR(c)
      • R(c);OGATE::PXR(c)=Q
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