MESON Chess Problem Database

Problem Display
PID: 259325 (1QR2K2/3P4/8/2NP1pp1/1p1kB2R/2N5/b7/B1qnb3 w - - 0 1)

Harwood, C

Western Morning News, 1923

(First published on Sat Dec 8 1923)

1QR2K2/3P4/8/2NP1pp1/1p1kB2R/2N5/b7/B1qnb3

#2

10 + 8

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Bd3#
    • 1...Qe3
      • 2.Se6#
    • 1...Se3
      • 2.Se6#
    • 1...fxe4
      • 2.Rxe4#
  • Tries
    • 1.Sxd1+?
      • 1...Qb2
        • 2.Se6#
      • 1...Qxa1
        • 2.Se6#
      • 1...Qc3
        • 2.Se6#
      • 1...Bc3
        • 2.Se6#
      • 1...Kc4!
    • 1.Sb5+?
      • 1...Kc4
        • 2.Sd6#
      • 1...Ke3!
    • 1.Sb3+?
      • 1...Ke3
        • 2.Qa7#
        • 2.Qb6#
      • 1...Bxb3!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Sd3#
      • 1...Ke3
        • 2.Sb3#
      • 1...Kc4
        • 2.Bd3#
      • 1...Ke5
        • 2.Sd3#
      • 1...fxe4
        • 2.Rxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • K(f);N_GUARD,P-FLIGHT::R(D)+B(C),DCHECK
    • Q(a);SBLOCK::S(E)
    • S(b);SBLOCK::S(E)
    • P(g);OGATE,P_SPINP(g),XB(C)::R1(D),XP(g)
  • Tries
    • Try
      • S(B);CHECK,XS(b)
      • Vars
        • Q(a);P_SPINQ(a)::S(E)
        • Q(a);XB(A)::S(E)
        • B(c);P_SPINB(c)::S(E)
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • S(B);CHECK
      • Vars
        • K(f);N_GUARD,P-FLIGHT,S_CUTB(c),S_CUTQ(a),S_CUTQ(a),S_CUTQ(a),S_CUTS(b),S_CUTS(b)::S(B)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • S(E);CHECK
      • Refutation
        • B(d);XS(E)
  • Actual
    • Q(H);
    • Threat
      • QAB(H)+S(E)
    • Vars
      • K(f);N_GUARD,S_FLIGHT::QAB(H)+S(E)
      • K(f);N_GUARD,P-FLIGHT::R(D)+B(C),DCHECK
      • K(f);S_FLIGHT::S(E)
      • P(g);OGATE,P_SPINP(g),XB(C)::R1(D),XP(g)
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