MESON Chess Problem Database

Problem Display
PID: 74858 (1NK3Q1/kn6/8/1P6/8/8/6B1/8 w - - 0 1)

Kirichenko, Anatoly Yakovlevich

Comm., Zheltonozhko-60 JT (Miniatures), 2006

1NK3Q1/kn6/8/1P6/8/8/6B1/8

#2

5 + 2

136 Problem Observer 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Ka8
      • 2.Qa2#
  • Tries
    • 1.Qa2+?
      • 1...Sa5
        • 2.Qf2#
        • 2.Qxa5#
      • 1...Kb6!
    • 1.Qe6?
      • threat
        • 2.Qa6#
      • 1...Ka8
        • 2.Qa2#
        • 2.Qa6#
      • 1...Sc5
        • 2.b6#
      • 1...Sd6+!
    • 1.Qf7?
      • threat
        • 2.Qxb7#
      • 1...Ka8
        • 2.Qa2#
        • 2.Qxb7#
      • 1...Kb6!
    • 1.Qh7?
      • threat
        • 2.Qxb7#
      • 1...Ka8
        • 2.Qxb7#
      • 1...Kb6!
    • 1.Qg6?
      • threat
        • 2.Qa6#
      • 1...Ka8
        • 2.Qa6#
      • 1...Sc5
        • 2.b6#
      • 1...Sd6+!
    • 1.Qg7?
      • threat
        • 2.Qxb7#
      • 1...Ka8
        • 2.Qa1#
        • 2.Qxb7#
      • 1...Kb6!
    • 1.b6+?
      • 1...Ka8
        • 2.Bxb7#
        • 2.Qa2#
      • 1...Kxb6!
  • Keys
    • 1.Kc7!
      • threat
        • 2.Sc6#
      • 1...Ka8
        • 2.Qa2#
      • 1...Sa5
        • 2.b6#
      • 1...Sd8
        • 2.Qa2#
        • 2.b6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT,P_SPINS(b)::QAR(E)
  • Tries
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • S(b);::P(B)
      • Refutation
        • S(b);CHECK
    • Try
      • Q(E);P_PINS(b)
      • Threat
        • QAR1(E),XS(b)
      • Refutation
        • K(a);N_SPINS(b),S_FLIGHT
    • Try
      • Q(E);P_PINS(b)
      • Threat
        • QAR1(E),XS(b)
      • Vars
        • K(a);P-FLIGHT::QAB1(E),XS(b)
      • Refutation
        • K(a);N_SPINS(b),S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • K(a);P-FLIGHT,P_SPINS(b)::QAR2(E)
        • S(b);::P(B)
      • Refutation
        • S(b);CHECK
    • Try
      • Q(E);P_PINS(b)
      • Threat
        • QAR1(E),XS(b)
      • Refutation
        • K(a);N_SPINS(b),S_FLIGHT
    • Try
      • P(B);CHECK
      • Refutation
        • K(a);S_FLIGHT,XP(B)
  • Actual
    • K(D);P-FLIGHT
    • Threat
      • S(C)
    • Vars
      • K(a);P-FLIGHT,P_SPINS(b)::QAR(E)
      • S(b);::P(B)
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