MESON Chess Problem Database

Problem Display
PID: 185817 (Br6/1N1pQ3/8/N2k1P2/8/1K2P3/8/8 w - - 0 1)

Stubbs, Arthur Goodwin

The Observer, 1932

(First published on Sun Jan 3 1932)

Br6/1N1pQ3/8/N2k1P2/8/1K2P3/8/8

#2

7 + 3

15239 Valois Notebooks 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb7+
      • 2.Bxb7#
    • 1...Rd8
      • 2.Sxd8#
    • 1...Re8
      • 2.Sd8#
    • 1...Rf8
      • 2.Sd8#
    • 1...Rg8
      • 2.Sd8#
    • 1...Rh8
      • 2.Sd8#
    • 1...d6
      • 2.Qe6#
  • Tries
    • 1.Qxd7+?
      • 1...Ke5
        • 2.Qe6#
      • 1...Ke4!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Sb4#
      • 1...Kxc6
        • 2.Qc5#
      • 1...dxc6
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • R(c);CHECK,OGATE,P_SPINR(c),XS(E)::B(G),XR(c)
    • R(c);N_PINS(E)::B(G)+S(E),XR(c)
    • R(c);N_PINS(E)::B(G)+S(E)
    • P(b);N_GUARD::QAB1(F)
  • Tries
    • Try
      • Q(F);CHECK,XP(b)
      • Vars
        • K(a);P-FLIGHT::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • K(a);S_FLIGHT,XS(C)::QAR1(F)
      • P(b);N_GUARD,XS(C)::QAB1(F)
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