MESON Chess Problem Database

Problem Display
PID: 80645 (2nNn3/3PR3/3k2pK/3P3R/3P4/8/2r5/8 w - - 0 1)

Welburn, T

The Field, 1948

(First published on Sat Jan 3 1948)

2nNn3/3PR3/3k2pK/3P3R/3P4/8/2r5/8

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.dxc8S#
    • 1...Rb2
      • 2.dxc8S#
    • 1...Rd2
      • 2.dxc8S#
    • 1...Re2
      • 2.dxc8S#
    • 1...Rf2
      • 2.dxc8S#
    • 1...Rg2
      • 2.dxc8S#
    • 1...Rh2
      • 2.dxc8S#
    • 1...Sc7
      • 2.dxc8S#
  • Tries
    • 1.dxe8Q?
      • threat
        • 2.Sb7#
        • 2.Sf7#
        • 2.Rd7#
        • 2.Qd7#
      • 1...gxh5
        • 2.Rd7#
        • 2.Qd7#
      • 1...g5
        • 2.Rd7#
        • 2.Qd7#
      • 1...Rb2
        • 2.Sf7#
        • 2.Rd7#
        • 2.Qd7#
      • 1...Rf2
        • 2.Sb7#
        • 2.Rd7#
        • 2.Qd7#
      • 1...Rc7
        • 2.Sf7#
        • 2.Re6#
      • 1...Sb6
        • 2.Sb7#
        • 2.Sf7#
      • 1...Sxe7!
  • Keys
    • 1.Sc6!
      • threat
        • 2.dxc8S#
        • 2.dxe8S#
        • 2.d8Q#
        • 2.d8R#
      • 1...Kc7
        • 2.d8Q#
      • 1...Rxc6
        • 2.d8Q#
      • 1...Sxe7
        • 2.d8Q#
      • 1...Rc1
        • 2.dxc8S#
        • 2.dxe8S#
        • 2.d8Q#
        • 2.d8R#
      • 1...Ra2
        • 2.dxc8S#
        • 2.dxe8S#
        • 2.d8Q#
        • 2.d8R#
      • 1...Rb2
        • 2.dxc8S#
        • 2.dxe8S#
        • 2.d8Q#
        • 2.d8R#
      • 1...Rd2
        • 2.dxc8S#
        • 2.dxe8S#
        • 2.d8Q#
        • 2.d8R#
      • 1...Re2
        • 2.dxc8S#
        • 2.dxe8S#
        • 2.d8Q#
        • 2.d8R#
      • 1...Rf2
        • 2.dxc8S#
        • 2.dxe8S#
        • 2.d8Q#
        • 2.d8R#
      • 1...Rg2
        • 2.dxc8S#
        • 2.dxe8S#
        • 2.d8Q#
        • 2.d8R#
      • 1...Rh2
        • 2.dxc8S#
        • 2.dxe8S#
        • 2.d8Q#
        • 2.d8R#
      • 1...Rc3
        • 2.dxc8S#
        • 2.dxe8S#
        • 2.d8Q#
        • 2.d8R#
      • 1...Rc4
        • 2.dxc8S#
        • 2.dxe8S#
        • 2.d8Q#
        • 2.d8R#
      • 1...Rc5
        • 2.dxc8S#
        • 2.dxe8S#
        • 2.d8Q#
        • 2.d8R#
      • 1...Sb6
        • 2.dxe8S#
      • 1...Sa7
        • 2.dxe8S#
        • 2.d8Q#
        • 2.d8R#
      • 1...Sf6
        • 2.dxc8S#
      • 1...Sc7
        • 2.dxc8S#
        • 2.d8Q#
        • 2.d8R#
      • 1...Sg7
        • 2.dxc8S#
        • 2.d8Q#
        • 2.d8R#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 8
  • Sets
    • R(a);N_GUARD::PXS(d)=S
    • R(a);N_GUARD,P_PINR(C)::PXS(d)=S
    • S(e);S_CUTR(a)::PXS(d)=S
  • Tries
    • Try
      • P(E);XS(e)
      • Threat
        • DUALS(4)
      • Refutation
        • S(d);XR(F)
  • Actual
    • S(G);
    • Threat
      • DUALS(4)
    • Vars
      • K(b);S_FLIGHT::P=Q
      • R(a);XS(G)::P=Q
      • S(d);XR(F)::P=Q
      • S(d);::PXS(e)=S
      • S(e);::PXS(d)=S
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