MESON Chess Problem Database

Problem Display
PID: 250395 (1Q6/6p1/6K1/3k4/P7/2R5/3N4/8 w - - 0 1)

Nikitin, V?

Uralski Problemist, 2009

1Q6/6p1/6K1/3k4/P7/2R5/3N4/8

#2

5 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Kf5?
      • threat
        • 2.Qe5#
        • 2.Qd8#
      • 1...Kd4
        • 2.Qe5#
      • 1...g6+!
    • 1.Sf3?
      • threat
        • 2.Qe5#
      • 1...Ke4
        • 2.Qe5#
      • 1...Ke6!
    • 1.Rd3+?
      • 1...Kc5
        • 2.Qd6#
        • 2.Qb5#
      • 1...Ke6
        • 2.Qd6#
        • 2.Qe8#
      • 1...Kc6!
    • 1.Qc7?
      • 1...Kd4
        • 2.Qc5#
      • 1...Ke6!
    • 1.Qd8+?
      • 1...Ke6
        • 2.Re3#
      • 1...Ke5!
  • Keys
    • 1.Sc4!
      • 1...Kd4
        • 2.Qe5#
      • 1...Ke4
        • 2.Qe5#
      • 1...Kc5
        • 2.Qd6#
      • 1...Kc6
        • 2.Sb6#
      • 1...Ke6
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAB1(E)
      • Refutation
        • P(b);CHECK
    • Try
      • S(A);
      • Threat
        • QAR1(E)
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(B);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::R(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(A);
    • Vars
      • K(a);N_GUARD,P-FLIGHT::QAB1(E)
      • K(a);N_GUARD,S_FLIGHT::QAR1(E)
      • K(a);N_GUARD,S_FLIGHT::R(B)+S(A)
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