MESON Chess Problem Database

Problem Display
PID: 265178 (3Nb2K/5p2/nP1k1P2/6R1/1p6/3P3B/nQP5/q7 w - - 0 1)

Carter, WH

Sunday Referee, 1936

(First published on Sun Nov 8 1936)

3Nb2K/5p2/nP1k1P2/6R1/1p6/3P3B/nQP5/q7

#2

9 + 7

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Qd4#
      • 2.Qe5#
    • 1...Qc1
      • 2.Qd4#
      • 2.Qe5#
    • 1...Qd1
      • 2.Qd4#
      • 2.Qe5#
    • 1...Qe1
      • 2.Qd4#
    • 1...Qf1
      • 2.Qd4#
      • 2.Qe5#
    • 1...Qg1
      • 2.Qe5#
    • 1...Qh1
      • 2.Qe5#
    • 1...Bc6
      • 2.Sxf7#
  • Tries
    • 1.Qxa1?
      • threat
        • 2.Qd4#
        • 2.Qe5#
      • 1...Bc6
        • 2.Sxf7#
        • 2.Qe5#
      • 1...Sc7
        • 2.Qe5#
      • 1...Sc3!
  • Keys
    • 1.c4!
      • threat
        • 2.Rd5#
      • 1...bxc4 ep
        • 2.Qh2#
      • 1...Qh1
        • 2.Qe5#
      • 1...Bc6
        • 2.Sxf7#
      • 1...Sc3
        • 2.Qh2#
      • 1...Sc7
        • 2.c5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(a);N_GUARD::QAR2(A)
    • Q(a);N_GUARD::QAB1(A)
    • Q(a);N_GUARD,P_PINB(D)::QAB1(A)
    • B(g);N_GUARD,SBLOCK::S(H),XP(f)
  • Tries
    • Try
      • Q(A);XQ(a)
      • Threat
        • DUALS(2)
      • Vars
        • S(d);::QAB1(A)
      • Refutation
        • S(b);
  • Actual
    • P(B);
    • Threat
      • R1(E)
    • Vars
      • P(c);EP,S_CUTQ(a),XP(B)::QAB(A)
      • Q(a);N_GUARD,P_PINB(D)::QAB1(A)
      • B(g);N_GUARD,SBLOCK::S(H),XP(f)
      • S(b);S_CUTQ(a)::QAB(A)
      • S(d);N_GUARD::P(B)
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