MESON Chess Problem Database

Problem Display
PID: 28336 (4K3/3R4/p1B1Q3/Rq4kN/6Pp/4r2P/8/b1B1rn2 w - - 0 1)

Gooderson, Arthur R

The Problemist, 1955

4K3/3R4/p1B1Q3/Rq4kN/6Pp/4r2P/8/b1B1rn2

#2

9 + 8

3207 A R Gooderson An English Progressive 1996
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Rg7#
    • 1...Qf5
      • 2.Rxf5#
    • 1...Bg7
      • 2.Rxg7#
  • Tries
    • 1.Kf7?
      • threat
        • 2.Qg6#
      • 1...Qf5+
        • 2.Rxf5#
      • 1...Bf6
        • 2.Qxf6#
      • 1...Qd5!
    • 1.Rxb5+?
      • 1...Be5
        • 2.Rxe5#
        • 2.Rg7#
        • 2.Qf6#
      • 1...axb5!
    • 1.Rd5+?
      • 1...Be5
        • 2.Qf6#
      • 1...Qxd5!
  • Keys
    • 1.Be4!
      • threat
        • 2.Qg6#
      • 1...Bf6
        • 2.Qxf6#
      • 1...Qe5
        • 2.Rg7#
      • 1...Qf5
        • 2.Rxf5#

This anticipates 95697(1987)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(f);S_CUTB(a)::R(H)
    • Q(f);OGATE::R1(D),XQ(f)
    • B(a);N_GUARD::R(H),XB(a)
  • Tries
    • Try
      • K(I);N_SPINQ(G),S_FLIGHT
      • Threat
        • QAR1(G)
      • Vars
        • Q(f);CHECK,OGATE::R1(D),XQ(f)
        • B(a);N_GUARD::QAB1(G),XB(a)
      • Refutation
        • Q(f);P_PINQ(G)
    • Try
      • R(D);CHECK,XQ(f)
      • Refutation
        • P(h);XR(D)
    • Try
      • R(H);CHECK,N_PINQ(f),P_SPINB(F)
      • Vars
        • B(a);N_PINQ(G),P_SPINB(a)::QAB1(G)
      • Refutation
        • Q(f);N_PINB(F),P_SPINQ(f),XR(H)
  • Actual
    • B(F);N_SPINQ(G),P_SPINR(H)
    • Threat
      • QAR1(G)
    • Vars
      • B(a);N_GUARD::QAB1(G),XB(a)
      • Q(f);N_PINR(H),P_PINQ(G)::R(H)
      • Q(f);N_PINR(H),OGATE::R1(D),XQ(f)
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