MESON Chess Problem Database

Problem Display
PID: 100926 (n1b5/k7/4R3/2N2P2/r2N2K1/R6Q/3b2BB/r7 w - - 0 1)

Faulkner, William J

Good Companions, 1919

n1b5/k7/4R3/2N2P2/r2N2K1/R6Q/3b2BB/r7

#2

9 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa3
      • 2.Sb5#
    • 1...Ra5
      • 2.Sb5#
    • 1...Ra6
      • 2.Sb5#
    • 1...Bb4
      • 2.Sb5#
  • Tries
    • 1.Rxa4+?
      • 1...Ba5
        • 2.Sb5#
      • 1...Ba6
        • 2.Sb5#
        • 2.Rexa6#
      • 1...Rxa4!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Bb8#
        • 2.Qb8#
      • 1...Rb1
        • 2.Bb8#
      • 1...Bb4
        • 2.Sb5#
      • 1...Bf4
        • 2.Sc6#
      • 1...Bb7
        • 2.Qxb7#
      • 1...Sb6
        • 2.Qxb6#
      • 1...Sc7
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • R(c);N_PINS(E),N_SPINR(c),XR(C)::S(E)
    • R(c);N_PINS(E)::S(E)
    • B(b);N_PINS(E)::S(E)
  • Tries
    • Try
      • R(C);CHECK,N_SPINS(E),XR(c)
      • Vars
        • B(b);P_SPINB(b)::S(E)
      • Refutation
        • R(a);P_PINS(E),XR(C)
  • Actual
    • Q(D);
    • Threat
      • DUALS(2)
    • Vars
      • R(a);::B(B)
      • B(b);N_PINS(E)::S(E)
      • B(f);N_GUARD::QAR1(D),XB(f)
      • S(e);N_GUARD::QAB1(D),XS(e)
      • S(e);N_GUARD::QAB1(D)
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