MESON Chess Problem Database

Problem Display
PID: 46561 (8/2K5/4p3/2pk4/7Q/4PN2/8/8 w - - 0 1)

Zimmer, Eligiusz

Problem Observer, 2003

8/2K5/4p3/2pk4/7Q/4PN2/8/8

#2

4 + 3

5454 Near Snap 2020

SOLUTION

  • SOUND
  • Sets
    • 1...c4
      • 2.Qd4#
  • Tries
    • 1.Kb6?
      • 1...Kd6
        • 2.Qd8#
      • 1...c4
        • 2.Qd4#
      • 1...e5!
    • 1.Kb7?
      • 1...Kd6
        • 2.Qd8#
      • 1...c4
        • 2.Qd4#
      • 1...e5!
    • 1.Kd7?
      • 1...c4
        • 2.Qd4#
      • 1...e5!
    • 1.Se5?
      • 1...c4
        • 2.Qd4#
      • 1...Kxe5!
    • 1.Sg5?
      • threat
        • 2.Qe4#
      • 1...c4
        • 2.Qd4#
      • 1...Ke5!
    • 1.Qa4?
      • threat
        • 2.e4#
      • 1...c4
        • 2.Qc6#
      • 1...e5!
    • 1.Qf4?
      • 1...c4
        • 2.Qe5#
        • 2.Qd4#
      • 1...e5!
    • 1.Qg4?
      • 1...c4
        • 2.Qd4#
      • 1...e5!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Qe4#
      • 1...Ke5
        • 2.Qg5#
      • 1...c4
        • 2.Qd4#
      • 1...e5
        • 2.Qc4#

Anticipated by 513(1957)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(a);N_GUARD::QAR1(C)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Vars
        • K(b);P-FLIGHT::QAR2(C)
        • P(a);N_GUARD::QAR1(C)
      • Refutation
        • P(c);
    • Try
      • K(D);P-FLIGHT
      • Vars
        • K(b);P-FLIGHT::QAR2(C)
        • P(a);N_GUARD::QAR1(C)
      • Refutation
        • P(c);
    • Try
      • K(D);P-FLIGHT
      • Vars
        • P(a);N_GUARD::QAR1(C)
      • Refutation
        • P(c);
    • Try
      • S(B);
      • Vars
        • P(a);N_GUARD::QAR1(C)
      • Refutation
        • K(b);P-FLIGHT,XS(B)
    • Try
      • S(B);
      • Threat
        • QAB1(C)
      • Vars
        • P(a);N_GUARD::QAR1(C)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • P(A)
      • Vars
        • P(a);::QAB1(C)
      • Refutation
        • P(c);
    • Try
      • Q(C);
      • Refutation
        • P(c);
    • Try
      • Q(C);
      • Vars
        • P(a);N_GUARD::QAR1(C)
      • Refutation
        • P(c);
  • Actual
    • S(B);
    • Threat
      • QAB1(C)
    • Vars
      • K(b);P-FLIGHT::QAR2(C)
      • P(a);N_GUARD::QAR1(C)
      • P(c);SBLOCK::QAB1(C)
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