MESON Chess Problem Database

Problem Display
PID: 164408 (8/5Q2/3p4/8/2p5/PkN5/8/2K5 w - - 0 1)

Kozhakin, Vladimir Vladimirovich

Sachmatija, 2006

8/5Q2/3p4/8/2p5/PkN5/8/2K5

#2

4 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Qxc4+?
      • 1...Kxa3
        • 2.Sb1#
        • 2.Sb5#
        • 2.Qa4#
      • 1...Kxc4!
    • 1.Qe8?
      • 1...Kxa3
        • 2.Qa4#
      • 1...Kxc3
        • 2.Qe3#
      • 1...d5!
    • 1.Qa7?
      • 1...Kxc3
        • 2.Qe3#
      • 1...d5!
    • 1.Qb7+?
      • 1...Kxa3
        • 2.Qb2#
      • 1...Kxc3!
    • 1.Qe7?
      • 1...Kxc3
        • 2.Qe3#
      • 1...d5
        • 2.Qb4#
      • 1...Kxa3!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Qb2#
      • 1...Kxa3
        • 2.Qb2#
      • 1...Kxc3
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(D);CHECK,XP(b)
      • Refutation
        • K(a);S_FLIGHT,XQ(D)
    • Try
      • Q(D);N_PINP(b)
      • Vars
        • K(a);P-FLIGHT,XP(B)::QAR1(D)
        • K(a);OGATEB,P-FLIGHT,XS(C)::QAR2(D)
      • Refutation
        • P(c);
    • Try
      • Q(D);N_PINP(b)
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(C)::QAR2(D)
      • Refutation
        • P(c);
    • Try
      • Q(D);CHECK,N_PINP(b)
      • Vars
        • K(a);OGATE,P-FLIGHT,XP(B)::QAB1(D)
      • Refutation
        • K(a);P-FLIGHT,XS(C)
    • Try
      • Q(D);N_PINP(b)
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(C)::QAR2(D)
        • P(c);OGATE::QAR1(D)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(c),XP(B)
  • Actual
    • Q(D);N_PINP(b)
    • Threat
      • QAR1(D)
    • Vars
      • K(a);P-FLIGHT,XP(B)::QAB1(D)
      • K(a);OGATEB,P-FLIGHT,XS(C)::QAR2(D)
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