MESON Chess Problem Database

Problem Display
PID: 252102 (8/2pK4/8/3kP3/3p4/3P4/3Q4/8 w - - 0 1)

Popovski, Aleksandr

Zadachi i Etyudi, 2004

8/2pK4/8/3kP3/3p4/3P4/3Q4/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qa5#
    • 1...Kxe5
      • 2.Qg5#
  • Tries
    • 1.Qe1?
      • 1...Kc5
        • 2.Qa5#
      • 1...c5
        • 2.Qe4#
      • 1...c6!
    • 1.Qh6?
      • 1...Kxe5
        • 2.Qg5#
      • 1...c5
        • 2.Qd6#
        • 2.Qe6#
      • 1...c6
        • 2.Qd6#
      • 1...Kc5!
    • 1.Qa2+?
      • 1...Kc5
        • 2.Qa5#
      • 1...Kxe5!
    • 1.Qg2+?
      • 1...Kxe5
        • 2.Qg5#
      • 1...Kc5!
  • Keys
    • 1.e6!
      • threat
        • 2.Qg5#
      • 1...Kc5
        • 2.Qa5#
      • 1...Ke5
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT,S_CUTP(c)::QAR2(A)
    • K(b);OGATEB,P-FLIGHT,XP(C)::QAR2(A)
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT,S_CUTP(c)::QAR2(A)
        • P(c);SBLOCK::QAB1(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Vars
        • K(b);OGATEB,P-FLIGHT,XP(C)::QAR2(A)
        • P(c);N_GUARD::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT,S_CUTP(c)::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT,XP(C)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATEB,P-FLIGHT,XP(C)::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • P(C);
    • Threat
      • QAR(A)
    • Vars
      • K(b);P-FLIGHT,S_CUTP(c)::QAR2(A)
      • K(b);P-FLIGHT::QAR2(A)
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