MESON Chess Problem Database

Problem Display
PID: 243835 (8/8/p2p4/3K4/k1N5/8/8/1Q6 w - - 0 1)

Chepizhni, Viktor Ivanovich

Kudesnik, 2005

8/8/p2p4/3K4/k1N5/8/8/1Q6

#2

3 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Kc6?
      • 1...a5
        • 2.Qb5#
      • 1...d5!
    • 1.Sd2?
      • 1...Ka3
        • 2.Qb3#
      • 1...a5
        • 2.Qb3#
      • 1...Ka5!
    • 1.Sa5?
      • 1...Ka3
        • 2.Qb3#
      • 1...Kxa5!
    • 1.Qa2+?
      • 1...Kb5
        • 2.Qb3#
        • 2.Qa5#
      • 1...Kb4!
    • 1.Qc2+?
      • 1...Kb5
        • 2.Qb3#
      • 1...Kb4!
    • 1.Qd1+?
      • 1...Kb5
        • 2.Qb3#
      • 1...Kb4!
  • Keys
    • 1.Qb2!
      • 1...a5
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • P(b);N_GUARD::QAB1(A)
      • Refutation
        • P(c);
    • Try
      • S(B);
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
        • P(b);SBLOCK::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(B);
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT,XS(B)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • P(b);SBLOCK::S(B)
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