MESON Chess Problem Database

Problem Display
PID: 84214 (RQR5/1K6/1P6/8/8/1k6/4n3/8 w - - 0 1)

Drazkowski, Krzysztof

Schach M, 1989

RQR5/1K6/1P6/8/8/1k6/4n3/8

#2

5 + 2

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qe5?
      • threat
        • 2.Qb5#
      • 1...Kb4
        • 2.Qb2#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sd4!
    • 1.Qd6?
      • threat
        • 2.Qa3#
      • 1...Kb2
        • 2.Qb4#
      • 1...Sc3!
    • 1.Qa7?
      • threat
        • 2.Qa3#
      • 1...Kb2
        • 2.Qa2#
      • 1...Kb4
        • 2.Qa4#
      • 1...Sc3!
  • Keys
    • 1.Qc7!
      • 1...Kb2
        • 2.Qc2#
      • 1...Kb4
        • 2.Qc4#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sc1
        • 2.Qc3#
      • 1...Sg1
        • 2.Qc3#
      • 1...Sg3
        • 2.Qc3#
      • 1...Sd4
        • 2.Qc3#
      • 1...Sf4
        • 2.Qc3#

Anticipated by 38294(1970)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(D);
      • Threat
        • QAR2(D)
      • Vars
        • K(b);P-FLIGHT::QAR2(D)
        • S(a);N_GUARD::QAR1(D),XS(a)
      • Refutation
        • S(a);
    • Try
      • Q(D);
      • Threat
        • QAR1(D)
      • Vars
        • K(b);P-FLIGHT::QAR2(D)
      • Refutation
        • S(a);
    • Try
      • Q(D);
      • Threat
        • QAR1(D)
      • Vars
        • K(b);P-FLIGHT::QAR1(D)
      • Refutation
        • S(a);
  • Actual
    • Q(D);
    • Vars
      • K(b);P-FLIGHT::QAR1(D)
      • S(a);N_GUARD::QAR1(D),XS(a)
      • S(a);N_GUARD::QAR1(D)
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