MESON Chess Problem Database

Problem Display
PID: 212375 (1BQ5/1n1pb2K/Nr5p/3kPBp1/3q4/1p6/5N2/3RR2b w - - 0 1)

Shire, David J

The Problemist, 1986

1BQ5/1n1pb2K/Nr5p/3kPBp1/3q4/1p6/5N2/3RR2b

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd1
      • 2.Rxd1#
    • 1...Qd2
      • 2.Rxd2#
    • 1...Qd3
      • 2.Rxd3#
    • 1...Rd6
      • 2.Sb4#
    • 1...Sd6
      • 2.Qc5#
    • 1...d6
      • 2.Be6#
  • Tries
    • 1.Be4+?
      • 1...Ke6
        • 2.Qg8#
      • 1...Bxe4+!
    • 1.Qxd7+?
      • 1...Rd6
        • 2.Be6#
      • 1...Bd6
        • 2.Be6#
      • 1...Sd6
        • 2.Be6#
      • 1...Kc4!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Se3#
      • 1...Qxd1
        • 2.Rxd1#
      • 1...Qd2
        • 2.Rxd2#
      • 1...Qd3
        • 2.Rxd3#
      • 1...Rd6
        • 2.Sb4#
      • 1...Bd6
        • 2.Sf6#
      • 1...Sd6
        • 2.Qc5#
      • 1...d6
        • 2.Be6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(c);N_SPINQ(c),OGATE,XR(A)::R(B),XQ(c)
    • Q(c);OGATEB::R(A),XQ(c)
    • Q(c);OGATEB,P_PINB(E)::R(A),XQ(c)
    • R(f);N_GUARD,S_CUTB(j)::S(F)
    • S(h);N_GUARD,S_CUTB(j)::QAR1(I)
    • P(i);N_GUARD,S_CUTR(f)::B(E)
  • Tries
    • Try
      • B(E);CHECK
      • Vars
        • K(d);N_SPINQ(c),P_SPINP(i),S_FLIGHT::QAB(I)
      • Refutation
        • B(a);CHECK,XB(E)
    • Try
      • Q(I);CHECK,XP(i)
      • Vars
        • R(f);P_SPINR(f)::B(E)
        • B(j);P_SPINB(j)::B(E)
        • S(h);P_SPINS(h)::B(E)
      • Refutation
        • K(d);N_SPINQ(c),S_FLIGHT
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • Q(c);N_SPINQ(c),OGATE,XR(A)::R(B),XQ(c)
      • Q(c);OGATEB::R(A),XQ(c)
      • Q(c);OGATEB,P_PINB(E)::R(A),XQ(c)
      • R(f);N_GUARD,S_CUTB(j)::S(F)
      • B(j);N_GUARD,S_CUTR(f)::S(C)
      • S(h);N_GUARD,S_CUTB(j)::QAR1(I)
      • P(i);N_GUARD,S_CUTR(f)::B(E)
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