MESON Chess Problem Database

Problem Display
PID: 54094 (1N2Q3/8/2K5/1r1P4/kB6/2P5/P7/8 w - - 0 1)

Bonavia-Hunt, Rev Noel Aubrey

Chess, 1943

1N2Q3/8/2K5/1r1P4/kB6/2P5/P7/8

#2

7 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5+
      • 2.Kxc5#
    • 1...Rxd5
      • 2.Kxd5#
    • 1...Rb6+
      • 2.Kxb6#
    • 1...Rb7
      • 2.Kxb7#
  • Tries
    • 1.Qd7?
      • 1...Rc5+
        • 2.Kxc5#
      • 1...Rb6+
        • 2.Kxb6#
      • 1...Rxb4
        • 2.Qa7#
      • 1...Rxd5
        • 2.Kxd5#
      • 1...Rxb8
        • 2.Qa7#
      • 1...Rb7
        • 2.Kxb7#
      • 1...Ra5!
  • Keys
    • 1.Sd7!
      • 1...Rc5+
        • 2.Sxc5#
      • 1...Rb6+
        • 2.Sxb6#
      • 1...Rxb4
        • 2.Qa8#
      • 1...Rxd5
        • 2.Sb6#
      • 1...Ra5
        • 2.Sb6#
      • 1...Rb7
        • 2.Sc5#
      • 1...Rb8
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(b);CHECK::QAB(G)+K(E),XR(b)
    • R(b);XP(D)::QAB(G)+K(E),XR(b)
    • R(b);::QAB(G)+K(E),XR(b)
  • Tries
    • Try
      • Q(G);
      • Vars
        • R(b);CHECK::QAB(G)+K(E),XR(b)
        • R(b);N_GUARD,XB(C)::QAR(G)
        • R(b);XP(D)::QAB(G)+K(E),XR(b)
        • R(b);N_GUARD,XS(F)::QAR(G)
        • R(b);::QAB(G)+K(E),XR(b)
      • Refutation
        • R(b);
  • Actual
    • S(F);
    • Vars
      • R(b);CHECK,N_GUARD::S(F),XR(b)
      • R(b);N_GUARD,XB(C)::QAR(G)
      • R(b);N_GUARD,XP(D)::S(F)
      • R(b);N_GUARD::S(F)
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