MESON Chess Problem Database

Problem Display
PID: 51430 (7b/prQ5/2N1p3/5b1R/RN2kP2/5p2/Bp3P2/1K6 w - - 0 1)

Massingham, HW

The Guardian, 1960

7b/prQ5/2N1p3/5b1R/RN2kP2/5p2/Bp3P2/1K6

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Be5
      • 2.Qxe5#
  • Tries
    • 1.Sd3+?
      • 1...Rb4
        • 2.Sc5#
      • 1...Bd4
        • 2.Sc5#
        • 2.Rxd4#
      • 1...Kxd3!
    • 1.Sa6+?
      • 1...Rb4
        • 2.Sc5#
      • 1...Bd4
        • 2.Sc5#
        • 2.Rxd4#
      • 1...Kd3!
  • Keys
    • 1.Se5!
      • threat
        • 2.Qc4#
      • 1...Kd4+
        • 2.Sc2#
      • 1...Kxf4+
        • 2.Sbd3#
      • 1...Rxb4
        • 2.Rxb4#
      • 1...Rxc7
        • 2.Sbc6#
      • 1...Bxe5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(h);N_GUARD::QAR1(I),XB(h)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • R(g);P_SPINR(g)::S(E)
      • Refutation
        • K(c);S_FLIGHT,XS(E)
    • Try
      • S(E);CHECK
      • Vars
        • R(g);P_SPINR(g)::S(E)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • S(H);
    • Threat
      • QAR2(I)
    • Vars
      • K(c);CHECK,P-FLIGHT::R(D)+S(E),DCHECK
      • K(c);CHECK,P-FLIGHT,XP(F)::R(D)+S(E),DCHECK
      • R(g);OGATE,P_SPINR(g),XS(E)::R(D),XR(g)
      • R(g);N_GUARD,XQ(I)::R(D)+S(E)
      • B(h);OGATE,XS(H)::QAR1(I),XB(h)
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Developed and maintained by Brian Stephenson.
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