MESON Chess Problem Database

Problem Display
PID: 81184 (2Q5/1R6/1nP5/pk1N4/2pP4/2P5/1K6/8 w - - 0 1)

Wigan, TK

The Field, 1950

(First published on Sat Dec 16 1950)

2Q5/1R6/1nP5/pk1N4/2pP4/2P5/1K6/8

#2

7 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Ka6
      • 2.Sc7#
  • Tries
    • 1.Ka3?
      • threat
        • 2.Rxb6#
      • 1...Ka6
        • 2.Sc7#
      • 1...a4!
    • 1.Qc7?
      • 1...Ka6
        • 2.Rxb6#
        • 2.Qxb6#
      • 1...a4
        • 2.Qxb6#
      • 1...Ka4!
    • 1.Qd8?
      • 1...Ka6
        • 2.Sc7#
        • 2.Qxb6#
      • 1...Kxc6
        • 2.Rxb6#
      • 1...a4
        • 2.Qxb6#
      • 1...Ka4!
  • Keys
    • 1.Qf5!
      • 1...Ka4
        • 2.Sxb6#
      • 1...Ka6
        • 2.Sc7#
      • 1...Kxc6
        • 2.Rxb6#
      • 1...a4
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(c);N_SPINS(d),S_FLIGHT::S(D)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • R1(F),XS(d)
      • Vars
        • K(c);N_SPINS(d),S_FLIGHT::S(D)
      • Refutation
        • P(b);
    • Try
      • Q(G);
      • Vars
        • P(b);SBLOCK::QAR1(G),XS(d)
      • Refutation
        • K(c);N_SPINS(d),S_FLIGHT
    • Try
      • Q(G);
      • Vars
        • K(c);N_SPINS(d),S_FLIGHT,XP(E)::R1(F),XS(d)
        • P(b);SBLOCK::QAR1(G),XS(d)
      • Refutation
        • K(c);N_SPINS(d),S_FLIGHT
  • Actual
    • Q(G);
    • Vars
      • K(c);N_SPINS(d),S_FLIGHT::S(D),XS(d)
      • K(c);N_SPINS(d),S_FLIGHT::S(D)
      • K(c);N_SPINS(d),S_FLIGHT,XP(E)::R1(F),XS(d)
      • P(b);SBLOCK::QAR(G)+S(D)
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