MESON Chess Problem Database

Problem Display
PID: 287116 (2R5/2N5/3K1P2/4P3/7q/p1kN1R2/Bb5r/6Q1 w - - 0 1)

Sumner, Christopher Richard Benson

Grantham Journal, 1924

(First published on Sat Oct 4 1924)

2R5/2N5/3K1P2/4P3/7q/p1kN1R2/Bb5r/6Q1

#2

9 + 5

15239 Valois Notebooks 2026

SOLUTION

  • SOUND
  • Sets
    • 1...Rd2
      • 2.Sb5#
      • 2.Sd5#
  • Tries
    • 1.Sxb2+?
      • 1...Kxb2
        • 2.Qb1#
      • 1...Kd2
        • 2.Qd1#
      • 1...Kb4
        • 2.Qc5#
        • 2.Qb6#
      • 1...Kc2!
    • 1.Sf2+?
      • 1...Kc2
        • 2.Qd1#
      • 1...Kd2
        • 2.Qd1#
      • 1...Kd4
        • 2.Sb5#
        • 2.Se6#
        • 2.Rd3#
        • 2.Qd1#
      • 1...Kb4!
    • 1.Qc1+?
      • 1...Kd4
        • 2.Qc4#
      • 1...Rc2
        • 2.Sb5#
      • 1...Bxc1!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Sb5#
      • 1...Qxf6+
        • 2.Se6#
      • 1...Qb4+
        • 2.Sc5#
      • 1...Qd4+
        • 2.Sd5#
      • 1...Kd4
        • 2.Sf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK,XB(a)
      • Vars
        • K(d);N_GUARD,S_FLIGHT,XS(C)::QAR1(A)
        • K(d);N_GUARD,S_FLIGHT::QAR1(A)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • K(d);N_GUARD,P-FLIGHT::QAB1(A)
        • K(d);N_GUARD,S_FLIGHT::QAR1(A)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);OGATE,S_FLIGHT::QAR1(A)
        • R(b);P_SPINR(b)::R(I)+S(H),DCHECK
      • Refutation
        • B(a);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • R(I)+S(H),DCHECK
    • Vars
      • Q(e);CHECK,N_GUARD,XP(G)::R(I)+S(H)
      • Q(e);CHECK,SBLOCK::R(D)+S(C)
      • Q(e);CHECK,SBLOCK::R(I)+S(H),DCHECK
      • K(d);N_GUARD,S_FLIGHT::QAR(A)+S(C)
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