MESON Chess Problem Database

Problem Display
PID: 230336 (8/4N3/3QN3/pr1P3r/4kP1p/1p2P3/b3K3/8 w - - 0 1)

Swords, WJ

Southend Times, 1939

(First published on Wed May 31 1939)

8/4N3/3QN3/pr1P3r/4kP1p/1p2P3/b3K3/8

#2

7 + 7

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4
      • 2.Sc5#
    • 1...Rc5
      • 2.Sxc5#
    • 1...Rb6
      • 2.Sc5#
    • 1...Rb7
      • 2.Sc5#
    • 1...Rb8
      • 2.Sc5#
    • 1...Re5
      • 2.Qxe5#
    • 1...Rg5
      • 2.Sxg5#
    • 1...Rh6
      • 2.Sg5#
      • 2.Qe5#
    • 1...Rh7
      • 2.Sg5#
      • 2.Qe5#
    • 1...Rh8
      • 2.Sg5#
      • 2.Qe5#
  • Tries
    • 1.Qb4+?
      • 1...Rxb4
        • 2.Sc5#
      • 1...axb4!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Qc4#
      • 1...Rbxd5
        • 2.Sc5#
      • 1...Rhxd5
        • 2.Sg5#
      • 1...Rb4
        • 2.Sc5#
      • 1...Rc5
        • 2.Sxc5#
      • 1...b2
        • 2.Qc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(f);N_GUARD::S(F)
    • R(f);N_GUARD::S(F),XR(f)
    • R(g);N_GUARD::QAR1(E),XR(g)
    • R(g);N_GUARD::S(F),XR(g)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • R(f);XQ(E)::S(F)
      • Refutation
        • P(e);XQ(E)
  • Actual
    • Q(E);
    • Threat
      • QAR2(E)
    • Vars
      • R(f);N_GUARD,P_SPINR(f),XP(D)::S(F)
      • R(g);N_GUARD,P_SPINR(g),XP(D)::S(F)
      • R(f);N_GUARD::S(F)
      • R(f);N_GUARD::S(F),XR(f)
      • P(b);N_GUARD::QAB(E)
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