MESON Chess Problem Database

Problem Display
PID: 199293 (1B6/2q4N/3rB2b/5p2/R3pk2/4R3/5N2/4Q2K w - - 0 1)

Braithwaite, Kenneth Holmes

The Problemist, 1982

1B6/2q4N/3rB2b/5p2/R3pk2/4R3/5N2/4Q2K

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Bxd6#
    • 1...Qc2
      • 2.Bxd6#
    • 1...Qc4
      • 2.Bxd6#
    • 1...Qa7
      • 2.Bxd6#
    • 1...Qb7
      • 2.Bxd6#
    • 1...Qf7
      • 2.Bxd6#
    • 1...Qc8
      • 2.Bxd6#
  • Tries
    • 1.Sd3+?
      • 1...Rxd3
        • 2.Qg3#
      • 1...Kg4!
    • 1.Sh3+?
      • 1...Kg4
        • 2.Sf6#
      • 1...Ke5!
  • Keys
    • 1.Sxe4!
      • threat
        • 2.Qg3#
      • 1...Kg4
        • 2.Sef6#
      • 1...Ke5
        • 2.Seg5#
      • 1...Qc1
        • 2.Sc3#
      • 1...Qg7
        • 2.Sef6#
      • 1...Rd1
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • Q(f);OGATE,P_PINQ(A),P_SPINR(d)::B(H),XR(d)
    • Q(f);OGATE,P_SPINR(d)::B(H),XR(d)
    • Q(f);N_SPINP(a),OGATE,P_SPINR(d)::B(H),XR(d)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • R(d);P_SPINQ(f),XS(C)::QAB1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • K(b);P-FLIGHT::S(G)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(C);XP(a)
    • Threat
      • QAB1(A)
    • Vars
      • K(b);P-FLIGHT,P_SPINP(c)::R(E)+S(C),DCHECK
      • K(b);S_FLIGHT::R(D)+S(C)
      • Q(f);N_GUARD,P_PINQ(A),P_SPINR(d)::R(E)+S(C)
      • Q(f);N_GUARD,P_SPINR(d)::R(E)+S(C)
      • R(d);N_GUARD,P_PINQ(A),P_SPINQ(f)::R(E)+S(C)
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