MESON Chess Problem Database

Problem Display
PID: 199975 (6bK/5rQ1/p1B5/1P2n3/3kN2b/3p4/3P4/2R5 w - - 0 1)

Bonavia-Hunt, Rev Noel Aubrey

The Observer, 1947

(First published on Sun Mar 9 1947)

6bK/5rQ1/p1B5/1P2n3/3kN2b/3p4/3P4/2R5

#2

7 + 7

15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.Qa7#
    • 1...Rf2
      • 2.Qa7#
    • 1...Rf3
      • 2.Qa7#
    • 1...Rf4
      • 2.Qa7#
    • 1...Rf5
      • 2.Qa7#
    • 1...Rf6
      • 2.Qa7#
    • 1...Ra7
      • 2.Qxa7#
    • 1...Rf8
      • 2.Qa7#
  • Keys
    • 1.Sd6!
      • threat
        • 2.Rc4#
      • 1...Rxg7
        • 2.Sf5#
      • 1...axb5
        • 2.Sxb5#
      • 1...Rf1
        • 2.Qa7#
      • 1...Rf2
        • 2.Qa7#
      • 1...Rf3
        • 2.Qa7#
      • 1...Rf4
        • 2.Qa7#
      • 1...Rf5
        • 2.Sxf5#
        • 2.Qa7#
      • 1...Rf6
        • 2.Qa7#
      • 1...Ra7
        • 2.Sf5#
        • 2.Qxa7#
      • 1...Rb7
        • 2.Sf5#
      • 1...Rc7
        • 2.Sf5#
      • 1...Rd7
        • 2.Sf5#
      • 1...Re7
        • 2.Sf5#
      • 1...Rf8
        • 2.Qa7#
      • 1...Bf6
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • R(f);OGATE::QAB(F)
    • R(f);N_SPINS(d),OGATE::QAB(F)
    • R(f);OGATE::QAB(F),XR(f)
  • Actual
    • S(C);
    • Threat
      • R1(A)
    • Vars
      • R(f);N_GUARD,N_SPINS(d),XQ(F)::S(C)
      • P(e);XP(D)::S(C),XP(e)
      • R(f);OGATE::QAB(F)
      • R(f);N_SPINS(d),OGATE::QAB(F)
      • R(f);N_GUARD::S(C)
      • B(c);N_SPINS(d),P_PINQ(F),S_CUTR(f)::S(C)
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