MESON Chess Problem Database

Problem Display
PID: 101614 (8/7N/pR1P4/3kN2R/8/4P3/7K/6Qb w - - 0 1)

Dujardin, Paul

diagrammes, 1989

8/7N/pR1P4/3kN2R/8/4P3/7K/6Qb

#2

8 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Sf6#
    • 1...Kc5
      • 2.e4#
    • 1...Ke6
      • 2.Qg8#
  • Tries
    • 1.Kxh1?
      • 1...Ke4
        • 2.Sf6#
      • 1...Kc5
        • 2.e4#
      • 1...Ke6
        • 2.Qg8#
      • 1...a5!
    • 1.Sf6+?
      • 1...Kc5
        • 2.e4#
      • 1...Ke6!
    • 1.Qc1?
      • threat
        • 2.Qc4#
      • 1...Ke4
        • 2.Sf6#
      • 1...Ke6!
    • 1.Qd1+?
      • 1...Ke4
        • 2.Qd3#
        • 2.Qd4#
      • 1...Kc5
        • 2.Qd4#
      • 1...Ke6!
    • 1.Qxh1+?
      • 1...Kc5
        • 2.Qc6#
      • 1...Ke6!
    • 1.Qg4?
      • threat
        • 2.Sd3#
        • 2.Sf3#
        • 2.Sc4#
        • 2.Sg6#
        • 2.Sd7#
        • 2.Sf7#
        • 2.Qc4#
      • 1...Kc5
        • 2.Sd7#
        • 2.Qd4#
      • 1...Bf3
        • 2.Sd3#
        • 2.Sxf3#
        • 2.Sc4#
        • 2.Sg6#
        • 2.Sd7#
        • 2.Sf7#
        • 2.Qc4#
      • 1...Be4!
    • 1.Qg8+?
      • 1...Kc5
        • 2.Sd7#
      • 1...Ke4!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Qc4#
      • 1...Ke4
        • 2.Qd3#
      • 1...Kc5
        • 2.Sd7#
      • 1...Ke6
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::S(H)
    • K(b);P-FLIGHT::QAB(A)+P(C)
    • K(b);S_FLIGHT::QAB(A)
  • Tries
    • Try
      • K(B);P-FLIGHT,XB(a)
      • Vars
        • K(b);S_FLIGHT::S(H)
        • K(b);P-FLIGHT::QAB(A)+P(C)
        • K(b);S_FLIGHT::QAB(A)
      • Refutation
        • P(c);
    • Try
      • S(H);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB(A)+P(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(b);S_FLIGHT::S(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK,XB(a)
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(7)
      • Refutation
        • B(a);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::R(E)+S(D),DCHECK
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(b);S_FLIGHT::QAB1(A)
      • K(b);P-FLIGHT::R(E)+S(D),DCHECK
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