MESON Chess Problem Database

Problem Display
PID: 211362 (7K/2P1N3/2p1Pk2/6p1/6n1/B2N3B/3Q4/8 w - - 0 1)

Quack, Godfrey C

The Problemist, 1986

7K/2P1N3/2p1Pk2/6p1/6n1/B2N3B/3Q4/8

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Sf2
      • 2.Qc3#
      • 2.Qb2#
      • 2.Qxf2#
    • 1...Sh2
      • 2.Qc3#
      • 2.Qb2#
    • 1...Se3
      • 2.Qc3#
      • 2.Qb2#
    • 1...Sh6
      • 2.Qc3#
      • 2.Qb2#
  • Tries
    • 1.Qe1?
      • 1...Se5
        • 2.Qxe5#
      • 1...Sf2
        • 2.Qxf2#
        • 2.Qc3#
        • 2.Qa1#
        • 2.Qe5#
      • 1...Sh2
        • 2.Qc3#
        • 2.Qa1#
        • 2.Qe5#
      • 1...Se3
        • 2.Qc3#
        • 2.Qa1#
      • 1...Sh6
        • 2.Qc3#
        • 2.Qa1#
        • 2.Qe5#
      • 1...c5!
    • 1.Qc3+?
      • 1...Se5
        • 2.Qxe5#
      • 1...Kxe6!
    • 1.Qf4+?
      • 1...Kxe6
        • 2.Bxg4#
        • 2.Qf5#
        • 2.c8Q#
        • 2.c8B#
      • 1...gxf4!
    • 1.Qa5?
      • threat
        • 2.Qf5#
      • 1...Kxe6
        • 2.Qf5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Se3
        • 2.Qc3#
        • 2.Qe5#
      • 1...Sh6
        • 2.Qc3#
        • 2.Qe5#
      • 1...c5!
    • 1.Qxg5+?
      • 1...Kxe6
        • 2.Qf5#
      • 1...Kxg5!
    • 1.Qb2+?
      • 1...Se5
        • 2.Qxe5#
      • 1...Kxe6!
    • 1.Qe2?
      • 1...Se5
        • 2.Qxe5#
      • 1...Sf2
        • 2.Qf3#
        • 2.Qb2#
        • 2.Qxf2#
        • 2.Qe5#
      • 1...Sh2
        • 2.Qb2#
        • 2.Qe5#
      • 1...Se3
        • 2.Qb2#
      • 1...Sh6
        • 2.Qb2#
        • 2.Qe5#
      • 1...c5!
    • 1.Qf2+?
      • 1...Kxe6
        • 2.Bxg4#
        • 2.Qf5#
        • 2.c8Q#
        • 2.c8B#
      • 1...Sxf2!
  • Keys
    • 1.Sc5!
      • 1...Ke5
        • 2.Bb2#
      • 1...Kxe7
        • 2.Qd8#
      • 1...Sf2
        • 2.Sd7#
      • 1...Sh2
        • 2.Sd7#
      • 1...Se3
        • 2.Sd7#
      • 1...Se5
        • 2.Se4#
      • 1...Sh6
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Vars
        • S(a);N_GUARD::QAB1(A),XS(a)
      • Refutation
        • P(c);
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(A),XS(a)
      • Refutation
        • K(d);P-FLIGHT,P_SPINS(a),XP(E)
    • Try
      • Q(A);CHECK
      • Refutation
        • P(b);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(d);P-FLIGHT,P_SPINS(a),XP(E)::QAB1(A)
        • S(a);N_GUARD::QAB1(A),XS(a)
      • Refutation
        • P(c);
    • Try
      • Q(A);CHECK,XP(b)
      • Vars
        • K(d);P-FLIGHT,P_SPINS(a),XP(E)::QAB1(A)
      • Refutation
        • K(d);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(A),XS(a)
      • Refutation
        • K(d);P-FLIGHT,P_SPINS(a),XP(E)
    • Try
      • Q(A);
      • Vars
        • S(a);N_GUARD::QAB1(A),XS(a)
        • S(a);N_GUARD::QAB(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);CHECK
      • Refutation
        • S(a);XQ(A)
  • Actual
    • S(C);
    • Vars
      • K(d);S_FLIGHT::B(B)
      • K(d);OGATEB,S_FLIGHT,XS(G)::QAB1(A)
      • S(a);::S(C)
      • S(a);SBLOCK::S(C)
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