MESON Chess Problem Database

Problem Display
PID: 137256 (7K/6R1/6Q1/8/1p6/bP6/2RP4/1k6 w - - 0 1)

Boswell, Edward

The Field, 1924

(First published on Thu Sep 4 1924)

7K/6R1/6Q1/8/1p6/bP6/2RP4/1k6

#2

6 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Rc1+?
      • 1...Ka2
        • 2.Qb1#
      • 1...Kb2
        • 2.Qb1#
        • 2.Qc2#
      • 1...Kxc1!
    • 1.Ra2+?
      • 1...Kc1
        • 2.Qc2#
        • 2.Qg1#
      • 1...Kxa2!
    • 1.Rb2+?
      • 1...Ka1
        • 2.Qb1#
      • 1...Kc1
        • 2.Qb1#
        • 2.Qc2#
      • 1...Kxb2!
    • 1.Qg1+?
      • 1...Bc1
        • 2.Qxc1#
      • 1...Kxc2!
  • Keys
    • 1.Ra7!
      • 1...Bb2+
        • 2.Rc3#
      • 1...Ka1
        • 2.Qg1#
      • 1...Bc1
        • 2.Rca2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(D)
      • Refutation
        • K(a);P-FLIGHT,XR(A)
    • Try
      • R(A);CHECK
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • R(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(D)
      • Refutation
        • K(a);P-FLIGHT,XR(A)
    • Try
      • Q(D);CHECK
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::QAR1(D),XB(b)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
  • Actual
    • R(E);
    • Vars
      • B(b);CHECK,SBLOCK::QAB(D)+R(A)
      • K(a);P-FLIGHT,P_SPINB(b)::QAR(D)
      • B(b);SBLOCK::QAB(D)+R(A)
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