MESON Chess Problem Database

Problem Display
PID: 272366 (8/b1R5/4pK2/1qNP4/PP5Q/2kP1p2/1R2b1p1/B3r1r1 w - - 0 1)

Westbury, Eric Ernest

Reading Observer, 1907

8/b1R5/4pK2/1qNP4/PP5Q/2kP1p2/1R2b1p1/B3r1r1

#2

10 + 9

17417 Westbury Scrapbooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa4
      • 2.Qc4#
    • 1...Qc4
      • 2.Qxc4#
    • 1...Qc6
      • 2.Qc4#
    • 1...Qd7
      • 2.Qc4#
    • 1...Qe8
      • 2.Qc4#
    • 1...Qxb4
      • 2.Qxb4#
    • 1...Qa5
      • 2.Qc4#
    • 1...Qb6
      • 2.Qc4#
    • 1...Qb7
      • 2.Qc4#
    • 1...Qb8
      • 2.Qc4#
    • 1...Bd1
      • 2.Ra2#
      • 2.Re2#
      • 2.Rf2#
      • 2.Rxg2#
  • Tries
    • 1.Se4+?
      • 1...Kxd3
        • 2.Rb3#
      • 1...Kd4!
  • Keys
    • 1.Ke5!
      • threat
        • 2.Qd4#
      • 1...Bd1+
        • 2.Re2#
      • 1...Bf1+
        • 2.Qxe1#
      • 1...Bxd3+
        • 2.Se4#
      • 1...Qxd3
        • 2.Se4#
      • 1...Qxb4
        • 2.Qxb4#
      • 1...Qc4
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 8
  • Sets
    • Q(g);N_GUARD,XP(D)::QAR1(F)
    • Q(g);N_GUARD::QAR1(F),XQ(g)
    • Q(g);N_GUARD::QAR1(F)
    • Q(g);OGATE,XP(E)::QAB1(F),XQ(g)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(e);N_GUARD,P-FLIGHT,XP(C)::R(B)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • K(I);S_FLIGHT
    • Threat
      • QAB1(F)
    • Vars
      • B(c);CHECK,S_CUTR(a)::B(A)+R(B)
      • B(c);CHECK,S_CUTR(b)::QAB(F),XR(a)
      • B(c);CHECK,SBLOCK,XP(C)::R(J)+S(G),DCHECK
      • Q(g);SBLOCK,XP(C)::R(J)+S(G),DCHECK
      • Q(g);OGATE,XP(E)::QAB1(F),XQ(g)
      • Q(g);N_GUARD::QAR1(F),XQ(g)
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