MESON Chess Problem Database

Problem Display
PID: 110142 (Q7/8/8/8/3K4/8/Pn1kP3/R7 w - - 0 1)

Lebedev, Danilo

Kudesnik, 1997

Q7/8/8/8/3K4/8/Pn1kP3/R7

#2

5 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe2
      • 2.Qg2#
  • Tries
    • 1.Qg2?
      • threat
        • 2.e3#
        • 2.e4#
      • 1...Kc2
        • 2.e3#
        • 2.e4#
      • 1...Sd3
        • 2.exd3#
      • 1...Sd1!
    • 1.Qf3?
      • 1...Kc2
        • 2.Qc3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sa4
        • 2.Qd3#
      • 1...Sc4
        • 2.Qd3#
      • 1...Sd1!
    • 1.Qe4?
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sa4
        • 2.Qd3#
      • 1...Sc4
        • 2.Qd3#
      • 1...Sd1!
    • 1.Qa3?
      • threat
        • 2.Qxb2#
      • 1...Kc2
        • 2.Qc3#
      • 1...Kxe2
        • 2.Qe3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sa4
        • 2.Qd3#
      • 1...Sc4
        • 2.Qd3#
      • 1...Sd1!
    • 1.Qa5+?
      • 1...Kc2
        • 2.Qc3#
      • 1...Kxe2!
  • Keys
    • 1.Qh1!
      • 1...Kc2
        • 2.Qc1#
      • 1...Kxe2
        • 2.Qg2#
      • 1...Sd1
        • 2.Qxd1#
      • 1...Sd3
        • 2.Qd1#
      • 1...Sa4
        • 2.Qd1#
      • 1...Sc4
        • 2.Qd1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,P-FLIGHT,XP(C)::QAR2(E)
  • Tries
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);OGATE::QAR(E)+P(C),XS(a)
      • Refutation
        • S(a);
    • Try
      • Q(E);
      • Vars
        • K(b);P-FLIGHT::QAR1(E)
        • S(a);N_GUARD::QAR1(E),XS(a)
        • S(a);N_GUARD::QAR1(E)
      • Refutation
        • S(a);
    • Try
      • Q(E);
      • Vars
        • S(a);N_GUARD::QAR1(E),XS(a)
        • S(a);N_GUARD::QAR1(E)
      • Refutation
        • S(a);
    • Try
      • Q(E);
      • Threat
        • QAR2(E),XS(a)
      • Vars
        • K(b);P-FLIGHT::QAR1(E)
        • K(b);P-FLIGHT,XP(C)::QAR1(E)
        • S(a);N_GUARD::QAR1(E),XS(a)
        • S(a);N_GUARD::QAR1(E)
      • Refutation
        • S(a);
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(E)
      • Refutation
        • K(b);P-FLIGHT,XP(C)
  • Actual
    • Q(E);
    • Vars
      • K(b);P-FLIGHT::QAR1(E)
      • K(b);OGATEB,P-FLIGHT,XP(C)::QAR2(E)
      • S(a);N_GUARD::QAR1(E),XS(a)
      • S(a);N_GUARD::QAR1(E)
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