MESON Chess Problem Database

Problem Display
PID: 6110 (Q7/1rkB1K2/4P2b/1p6/1B6/8/8/8 w - - 0 1)

Sumner, Christopher Richard Benson

Chess Amateur (The), 1927

Q7/1rkB1K2/4P2b/1p6/1B6/8/8/8

#2

5 + 4

3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Kb6
      • 2.Qa5#
    • 1...Rb6
      • 2.Qc8#
  • Tries
    • 1.Be7?
      • threat
        • 2.Qd8#
      • 1...Ra7
        • 2.Qxa7#
      • 1...Rb6
        • 2.Qc8#
      • 1...Rb8
        • 2.Qc6#
      • 1...Kb6!
    • 1.Qxb7+?
      • 1...Kd8
        • 2.Ba5#
        • 2.Be7#
        • 2.Qc8#
        • 2.Qb6#
        • 2.Qb8#
        • 2.e7#
      • 1...Kxb7!
  • Keys
    • 1.e7!
      • threat
        • 2.Qd8#
      • 1...Kb6
        • 2.Qa5#
      • 1...Kxd7
        • 2.Qxb7#
      • 1...Ra7
        • 2.Qxa7#
      • 1...Rb6
        • 2.Qc8#
      • 1...Rb8
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(d);P_PINB(C),S_FLIGHT::QAB1(E)
    • R(c);SBLOCK::QAR1(E)
  • Tries
    • Try
      • B(A);
      • Threat
        • QAB1(E)
      • Vars
        • R(c);OGATEB::QAR2(E),XR(c)
        • R(c);SBLOCK::QAR1(E)
        • R(c);OGATE,SBLOCK::QAR1(E)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(E);CHECK,XR(c)
      • Refutation
        • K(d);P-FLIGHT,XQ(E)
  • Actual
    • P(B);
    • Threat
      • QAB1(E)
    • Vars
      • K(d);S_FLIGHT::QAB1(E)
      • K(d);P-FLIGHT,XB(C)::QAR2(E),XR(c)
      • R(c);OGATEB::QAR2(E),XR(c)
      • R(c);SBLOCK::QAR1(E)
      • R(c);OGATE,SBLOCK::QAR1(E)
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