MESON Chess Problem Database

Problem Display
PID: 244690 (8/2n5/8/2Q5/k3K3/B7/B1n5/8 w - - 0 1)

Chistyakov, Nikolay

Kudesnik, 1995

8/2n5/8/2Q5/k3K3/B7/B1n5/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Qb4#
    • 1...Se1
      • 2.Qb4#
    • 1...Se3
      • 2.Qb4#
    • 1...Sb4
      • 2.Qxb4#
    • 1...Sd4
      • 2.Qb4#
  • Tries
    • 1.Qa7+?
      • 1...Sa6
        • 2.Qxa6#
      • 1...Kb5!
    • 1.Qc4+?
      • 1...Kxa3
        • 2.Qb3#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Ka5!
  • Keys
    • 1.Qb6!
      • 1...Kxa3
        • 2.Qb3#
      • 1...Sxa3
        • 2.Bb3#
      • 1...Sa1
        • 2.Qb4#
      • 1...Se1
        • 2.Qb4#
      • 1...Se3
        • 2.Qb4#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Sd4
        • 2.Qb4#
      • 1...Sb5
        • 2.Qa6#
      • 1...Sd5
        • 2.Qa6#
      • 1...Sa6
        • 2.Qxa6#
      • 1...Se6
        • 2.Qa6#
      • 1...Sa8
        • 2.Qa6#
      • 1...Se8
        • 2.Qa6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAR1(D)
    • S(a);N_GUARD::QAR1(D),XS(a)
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAR2(D),XS(c)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);P-FLIGHT,XB(B)::QAR1(D)
        • S(a);N_GUARD,P_SPINS(a)::QAR1(D),XS(a)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(D);
    • Vars
      • K(b);P-FLIGHT,XB(B)::QAR1(D)
      • S(a);SBLOCK,XB(B)::B(A)
      • S(a);N_GUARD::QAR1(D)
      • S(a);N_GUARD::QAR1(D),XS(a)
      • S(c);N_GUARD::QAR2(D)
      • S(c);N_GUARD::QAR2(D),XS(c)
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