MESON Chess Problem Database

Problem Display
PID: 18134 (4n3/8/4b3/1QRppk1N/8/1N1P4/K5R1/8 w - - 0 1)

Bonavia-Hunt, Rev Noel Aubrey

Time & Tide, 1953

4n3/8/4b3/1QRppk1N/8/1N1P4/K5R1/8

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Bd7
      • 2.Qxd7#
    • 1...d4
      • 2.Rxe5#
  • Tries
    • 1.Qa4?
      • threat
        • 2.Qg4#
      • 1...e4
        • 2.Qxe4#
      • 1...Sf6
        • 2.Sg7#
      • 1...d4!
    • 1.Qxe8?
      • threat
        • 2.Qg6#
      • 1...Bf7
        • 2.Qxf7#
      • 1...e4!
    • 1.Qb4?
      • threat
        • 2.Qg4#
      • 1...e4
        • 2.Qxe4#
      • 1...Sf6
        • 2.Sg7#
      • 1...d4!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qg4#
      • 1...dxc4
        • 2.Sd4#
      • 1...e4
        • 2.Qxe4#
      • 1...Sf6
        • 2.Sg7#
      • 1...d4
        • 2.Sxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(d);OGATEB::QAB(E),XB(d)
    • P(a);OGATE,P_PINS(C),P_SPINP(b)::R1(F),XP(b)
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • P(b);P_SPINP(a)::QAB1(E),XP(b)
        • S(e);N_GUARD,SBLOCK::S(G)
      • Refutation
        • P(a);P_PINS(C),P_SPINP(b)
    • Try
      • Q(E);XS(e)
      • Threat
        • QAB1(E)
      • Vars
        • B(d);N_GUARD::QAR2(E),XB(d)
      • Refutation
        • P(b);P_SPINP(a)
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • P(b);P_SPINP(a)::QAB1(E),XP(b)
        • S(e);N_GUARD,SBLOCK::S(G)
      • Refutation
        • P(a);P_PINS(C),P_SPINP(b)
  • Actual
    • Q(E);
    • Threat
      • QAB1(E)
    • Vars
      • P(a);P_SPINP(b),XQ(E)::S(C)
      • P(b);P_SPINP(a)::QAB1(E),XP(b)
      • S(e);N_GUARD,SBLOCK::S(G)
      • P(a);P_SPINP(b)::S(C),XP(a)
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