MESON Chess Problem Database

Problem Display
PID: 320 (1QK1B3/8/2R5/2nk1P2/2Rb1P2/4p3/P3P3/8 w - - 0 1)

Harley, Ella Margaret

The Observer, 1923

(First published on Sun Feb 18 1923)

1QK1B3/8/2R5/2nk1P2/2Rb1P2/4p3/P3P3/8

#2

9 + 4

887 Mate in Two Moves 1931
15290 Harley Scrapbook 2015
15239 Valois Notebooks 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc4
      • 2.Qb3#
    • 1...Ke4
      • 2.Qe5#
    • 1...Ba1
      • 2.R6xc5#
    • 1...Bb2
      • 2.R6xc5#
    • 1...Bc3
      • 2.R6xc5#
    • 1...Be5
      • 2.R6xc5#
    • 1...Bf6
      • 2.R6xc5#
    • 1...Bg7
      • 2.R6xc5#
    • 1...Bh8
      • 2.R6xc5#
    • 1...Se4
      • 2.Bf7#
  • Tries
    • 1.R6xc5+?
      • 1...Ke4
        • 2.Bc6#
        • 2.Qe5#
      • 1...Bxc5!
    • 1.Qd6+?
      • 1...Ke4
        • 2.Qe5#
      • 1...Kxc4!
    • 1.Qb5?
      • 1...Ba1
        • 2.Bf7#
        • 2.Qxc5#
      • 1...Bb2
        • 2.Bf7#
        • 2.Qxc5#
      • 1...Bc3
        • 2.Bf7#
        • 2.Qxc5#
      • 1...Be5
        • 2.Bf7#
        • 2.Qxc5#
      • 1...Bf6
        • 2.Bf7#
        • 2.Qxc5#
      • 1...Bg7
        • 2.Bf7#
        • 2.Qxc5#
      • 1...Bh8
        • 2.Bf7#
        • 2.Qxc5#
      • 1...Ke4!
  • Keys
    • 1.Bh5!
      • 1...Kxc4
        • 2.Qb3#
      • 1...Ke4
        • 2.Qe5#
      • 1...Kxc6
        • 2.Bf3#
      • 1...Ba1
        • 2.R6xc5#
      • 1...Bb2
        • 2.R6xc5#
      • 1...Bc3
        • 2.R6xc5#
      • 1...Be5
        • 2.R6xc5#
      • 1...Bf6
        • 2.R6xc5#
      • 1...Bg7
        • 2.R6xc5#
      • 1...Bh8
        • 2.R6xc5#
      • 1...Sb3
        • 2.Bf3#
      • 1...Sd3
        • 2.Bf3#
      • 1...Sa4
        • 2.Bf3#
      • 1...Se4
        • 2.Bf7#
      • 1...Sa6
        • 2.Bf3#
      • 1...Se6
        • 2.Bf3#
      • 1...Sb7
        • 2.Bf3#
      • 1...Sd7
        • 2.Bf3#

Originally published under the name Ella M. Beddall.

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • K(d);OGATEB,P_SPINS(c),S_FLIGHT,XR(C)::QAB1(G)
    • K(d);P_SPINB(b),S_FLIGHT::QAR1(G)
    • B(b);N_GUARD::R1(F),XS(c)
    • S(c);N_GUARD,SBLOCK::B(I)
  • Tries
    • Try
      • R(F);CHECK,XS(c)
      • Refutation
        • B(b);XR(F)
    • Try
      • Q(G);CHECK
      • Vars
        • K(d);P_SPINB(b),S_FLIGHT::QAR1(G)
      • Refutation
        • K(d);P_SPINS(c),S_FLIGHT,XR(C)
    • Try
      • Q(G);P_PINS(c)
      • Refutation
        • K(d);N_SPINS(c),P_SPINB(b),S_FLIGHT
  • Actual
    • B(I);
    • Vars
      • K(d);OGATEB,P_SPINS(c),S_FLIGHT,XR(C)::QAB1(G)
      • K(d);P_SPINB(b),S_FLIGHT::QAR1(G)
      • K(d);P_SPINS(c),S_FLIGHT,XR(F)::B(I)
      • B(b);N_GUARD::R1(F),XS(c)
      • S(c);N_GUARD::B(I)
      • S(c);N_GUARD,SBLOCK::B(I)
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