MESON Chess Problem Database

Problem Display
PID: 165044 (1q6/1P1p4/R3PPn1/2p1k1r1/4B2B/8/3P1QN1/4RK2 w - - 0 1)

Stubbs, Arthur Goodwin

The Observer, 1927

(First published on Sun Mar 6 1927)

1q6/1P1p4/R3PPn1/2p1k1r1/4B2B/8/3P1QN1/4RK2

#2

11 + 6

15239 Valois Notebooks 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6
      • 2.Bc6#
    • 1...Qxb7
      • 2.Bxb7#
    • 1...Rxg2
      • 2.Bxg2#
    • 1...Rf5
      • 2.Bf3#
    • 1...d5
      • 2.Bb1#
      • 2.Bc2#
      • 2.Bd3#
      • 2.Bxg6#
    • 1...d6
      • 2.Bc6#
  • Keys
    • 1.d3!
      • threat
        • 2.Qb2#
      • 1...Qxb7
        • 2.Bxb7#
      • 1...Rxg2
        • 2.Bxg2#
      • 1...Qd6
        • 2.Bc6#
      • 1...d6
        • 2.Bc6#
      • 1...Rf5
        • 2.Bf3#
      • 1...c4
        • 2.d4#
      • 1...d5
        • 2.Bxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(f);SBLOCK::R(A)+B(F)
    • Q(f);OGATE,XP(K)::R(A)+B(F),XQ(f)
    • R(c);OGATE,XS(E)::R(A)+B(F),XR(c)
    • R(c);P_PINQ(D),SBLOCK::R(A)+B(F)
    • P(e);SBLOCK::R(A)+B(F)
  • Actual
    • P(C);
    • Threat
      • QAB(D)
    • Vars
      • Q(f);OGATE,XP(K)::R(A)+B(F),XQ(f)
      • R(c);OGATE,XS(E)::R(A)+B(F),XR(c)
      • Q(f);SBLOCK::R(A)+B(F)
      • P(e);SBLOCK::R(A)+B(F)
      • R(c);P_PINQ(D),SBLOCK::R(A)+B(F)
      • P(a);N_GUARD::P(C)
      • P(e);SBLOCK::R(A)+B(F),XS(d)
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