MESON Chess Problem Database

Problem Display
PID: 74948 (8/p6Q/P2p4/5K2/3p3N/4k3/R7/8 w - - 0 1)

Turevski, Dmitri Evgenevich

Problem Online, 2007

8/p6Q/P2p4/5K2/3p3N/4k3/R7/8

#2

5 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Qxa7#
  • Tries
    • 1.Sg2+?
      • 1...Kf3
        • 2.Qh3#
      • 1...Kd3!
    • 1.Rc2?
      • 1...Kd3
        • 2.Kf4#
      • 1...d3
        • 2.Qxa7#
      • 1...d5!
    • 1.Qg6?
      • threat
        • 2.Qg3#
      • 1...d3
        • 2.Qg1#
      • 1...Kd3!
    • 1.Qb7?
      • threat
        • 2.Qf3#
        • 2.Qe4#
      • 1...Kd3
        • 2.Qb3#
      • 1...d3
        • 2.Qe4#
        • 2.Qxa7#
      • 1...d5!
    • 1.Qc7?
      • 1...d5
        • 2.Qg3#
      • 1...d3
        • 2.Qxa7#
      • 1...Kd3!
    • 1.Qf7?
      • 1...Kd3
        • 2.Qb3#
      • 1...d3
        • 2.Qxa7#
      • 1...d5!
    • 1.Qg7?
      • threat
        • 2.Qg3#
      • 1...d3
        • 2.Qg1#
        • 2.Qxa7#
      • 1...Kd3!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Qg3#
      • 1...Kd3
        • 2.Qb3#
      • 1...d3
        • 2.Qg1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATEB,SBLOCK::QAB(E),XP(d)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(A);
      • Vars
        • K(a);P-FLIGHT::QAB(E)+K(C)
        • P(b);OGATEB,SBLOCK::QAB(E),XP(d)
      • Refutation
        • P(c);
    • Try
      • Q(E);
      • Threat
        • QAR2(E)
      • Vars
        • P(b);SBLOCK::QAB(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR2(E)
      • Refutation
        • P(c);
    • Try
      • Q(E);
      • Vars
        • P(c);OGATE::QAR2(E)
        • P(b);OGATEB,SBLOCK::QAB(E),XP(d)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);P-FLIGHT::QAR2(E)
        • P(b);OGATEB,SBLOCK::QAB(E),XP(d)
      • Refutation
        • P(c);
    • Try
      • Q(E);
      • Threat
        • QAR2(E)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(E);
    • Threat
      • QAR2(E)
    • Vars
      • K(a);P-FLIGHT::QAR2(E)
      • P(b);SBLOCK::QAB(E)
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