MESON Chess Problem Database

Problem Display
PID: 271155 (8/p2r4/K1QP4/4kp1P/3N4/5p2/1B3P2/8 w - - 0 1)

Westbury, Eric Ernest

Reading Observer, 1902

8/p2r4/K1QP4/4kp1P/3N4/5p2/1B3P2/8

#2

7 + 5

17417 Westbury Scrapbooks 2023

SOLUTION

  • SOUND
  • Tries
    • 1.Sxf3+?
      • 1...Ke6
        • 2.Sg5#
      • 1...Kf4!
    • 1.Sb5+?
      • 1...Ke6
        • 2.Qc4#
      • 1...Kf4!
    • 1.Qd5+?
      • 1...Kf4
        • 2.Qxf5#
      • 1...Kf6
        • 2.Sxf3#
      • 1...Kxd5!
    • 1.Qxd7?
      • 1...Ke4
        • 2.Qxf5#
      • 1...Kf4
        • 2.Qxf5#
      • 1...Kf6
        • 2.Sxf3#
        • 2.Se6#
        • 2.Qe7#
      • 1...f4
        • 2.Qe6#
      • 1...Kd5!
    • 1.Qc5+?
      • 1...Ke4
        • 2.Qxf5#
      • 1...Kf4
        • 2.Qxf5#
      • 1...Kf6!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Sb5#
      • 1...Rxd6+
        • 2.Sc6#
      • 1...Ke4
        • 2.Sc2#
        • 2.Se2#
        • 2.Sb3#
        • 2.Sb5#
        • 2.Sc6#
        • 2.Se6#
      • 1...Kf4
        • 2.Se6#
      • 1...Kxd6
        • 2.Sxf5#
      • 1...Kf6
        • 2.Sxf3#
      • 1...f4
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK,XP(a)
      • Vars
        • K(b);N_GUARD,P-FLIGHT::S(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB(F)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(F),XP(c)
        • K(b);N_GUARD,S_FLIGHT::B(A)+S(C),XP(a)
      • Refutation
        • K(b);P-FLIGHT,XQ(F)
    • Try
      • Q(F);XR(e)
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAB1(F),XP(c)
        • K(b);N_GUARD,S_FLIGHT::QAR1(F),XP(c)
        • P(c);SBLOCK::QAR1(F)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAB1(F),XP(c)
        • K(b);OGATE,S_FLIGHT::QAR1(F),XP(c)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(F);
    • Threat
      • B(A)+S(C)
    • Vars
      • R(e);CHECK,SBLOCK,XP(G)::B(A)+S(C),DCHECK
      • K(b);N_GUARD,S_FLIGHT::QAR(F)+S(C),DCHECK
      • K(b);N_GUARD,S_FLIGHT,XP(G)::S(C),XP(c)
      • K(b);N_GUARD,S_FLIGHT::B(A)+S(C),XP(a)
      • P(c);SBLOCK::QAR1(F)
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