MESON Chess Problem Database

Problem Display
PID: 231794 (8/8/Np6/p7/kN6/5Q2/8/3K4 w - - 0 1)

Velikhanov, Kenan

ChessStar, 2011

8/8/Np6/p7/kN6/5Q2/8/3K4

#2

4 + 3

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kb5
      • 2.Qc6#
  • Tries
    • 1.Kc2?
      • 1...Kb5
        • 2.Qc6#
      • 1...b5
        • 2.Qb3#
      • 1...axb4!
    • 1.Sa2?
      • 1...b5
        • 2.Sc5#
      • 1...Kb5!
    • 1.Sc2?
      • 1...b5
        • 2.Sc5#
        • 2.Qa3#
      • 1...Kb5!
    • 1.Sd5?
      • 1...b5
        • 2.Sb6#
        • 2.Sc5#
      • 1...Kb5!
    • 1.Sc6?
      • 1...b5
        • 2.Sc5#
      • 1...Kb5!
    • 1.Qd5?
      • 1...Ka3
        • 2.Qa2#
      • 1...b5
        • 2.Qa2#
      • 1...axb4!
  • Keys
    • 1.Qc3!
      • 1...Kb5
        • 2.Qc6#
      • 1...axb4
        • 2.Qxb4#
      • 1...b5
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB1(B)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
        • P(c);SBLOCK::QAB1(B)
      • Refutation
        • P(b);XS(C)
    • Try
      • S(C);
      • Vars
        • P(c);N_GUARD,SBLOCK::S(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(C);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(C);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(C);
      • Vars
        • P(c);N_GUARD,SBLOCK::S(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
        • P(c);SBLOCK::QAR2(B)
      • Refutation
        • P(b);XS(C)
  • Actual
    • Q(B);
    • Vars
      • K(a);S_FLIGHT::QAB1(B)
      • P(b);OGATE,XS(C)::QAR1(B),XP(b)
      • P(c);N_GUARD,SBLOCK::S(D)
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