MESON Chess Problem Database

Problem Display
PID: 204616 (1B4Q1/8/8/8/7p/4pK1p/8/7k w - - 0 1)

Barclay, William L

Deutsche Schachzeitung, 1988

1B4Q1/8/8/8/7p/4pK1p/8/7k

#2

3 + 4

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...h2
      • 2.Qg2#
  • Tries
    • 1.Bf4?
      • 1...h2
        • 2.Qg2#
      • 1...e2!
    • 1.Be5?
      • 1...h2
        • 2.Qg2#
      • 1...e2!
    • 1.Bd6?
      • 1...h2
        • 2.Qg2#
      • 1...e2!
    • 1.Ba7?
      • 1...h2
        • 2.Qg2#
      • 1...e2
        • 2.Qg1#
      • 1...Kh2!
    • 1.Bc7?
      • 1...h2
        • 2.Qg2#
      • 1...e2!
    • 1.Qa2?
      • threat
        • 2.Qb1#
        • 2.Qa1#
        • 2.Qh2#
      • 1...Kg1
        • 2.Qb1#
        • 2.Qa1#
      • 1...h2
        • 2.Qb1#
        • 2.Qa1#
        • 2.Qg2#
        • 2.Qxh2#
      • 1...e2!
    • 1.Qb3?
      • threat
        • 2.Qd1#
        • 2.Qb1#
      • 1...Kg1
        • 2.Qd1#
        • 2.Qb1#
      • 1...e2!
    • 1.Qc4?
      • threat
        • 2.Qf1#
        • 2.Qc1#
      • 1...Kg1
        • 2.Qc1#
      • 1...e2!
    • 1.Qh7?
      • threat
        • 2.Qb1#
      • 1...Kg1
        • 2.Qb1#
      • 1...e2!
    • 1.Qg3?
      • threat
        • 2.Qe1#
        • 2.Qh2#
      • 1...h2
        • 2.Qe1#
        • 2.Qxh2#
        • 2.Qg2#
      • 1...hxg3!
    • 1.Qg4?
      • 1...h2
        • 2.Qg2#
      • 1...e2!
    • 1.Qg5?
      • 1...h2
        • 2.Qg2#
      • 1...e2!
    • 1.Qc8?
      • threat
        • 2.Qc1#
      • 1...Kg1
        • 2.Qc1#
      • 1...e2!
    • 1.Qd8?
      • threat
        • 2.Qd1#
      • 1...Kg1
        • 2.Qd1#
      • 1...e2!
    • 1.Qh8?
      • threat
        • 2.Qa1#
      • 1...Kg1
        • 2.Qa1#
      • 1...e2!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Qd1#
      • 1...Kg1
        • 2.Qd1#
      • 1...e2
        • 2.Kf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(c);N_GUARD::QAB1(C)
  • Tries
    • Try
      • B(B);
      • Vars
        • P(c);N_GUARD::QAB1(C)
      • Refutation
        • P(b);
    • Try
      • B(B);
      • Vars
        • P(c);N_GUARD::QAB1(C)
      • Refutation
        • P(b);
    • Try
      • B(B);
      • Vars
        • P(c);N_GUARD::QAB1(C)
      • Refutation
        • P(b);
    • Try
      • B(B);
      • Vars
        • P(c);N_GUARD::QAB1(C)
        • P(b);::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(B);
      • Vars
        • P(c);N_GUARD::QAB1(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);
      • Threat
        • DUALS(3)
      • Refutation
        • P(b);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Refutation
        • P(b);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);
      • Threat
        • QAR(C)
      • Vars
        • K(a);P-FLIGHT::QAR(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Refutation
        • P(d);XQ(C)
    • Try
      • Q(C);
      • Vars
        • P(c);N_GUARD::QAB1(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);
      • Vars
        • P(c);N_GUARD::QAB1(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);
      • Threat
        • QAR(C)
      • Vars
        • K(a);P-FLIGHT::QAR(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);
      • Threat
        • QAR(C)
      • Vars
        • K(a);P-FLIGHT::QAR(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • K(a);P-FLIGHT::QAR(C)
      • Refutation
        • P(b);
  • Actual
    • Q(C);
    • Threat
      • QAR(C)
    • Vars
      • K(a);P-FLIGHT::QAR(C)
      • P(b);::QAB(C)+K(A)
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