MESON Chess Problem Database

Problem Display
PID: 156917 (8/K7/1B6/8/kb6/8/1Q1N4/8 w - - 0 1)

Agapov, Igor Alexeyevich

Juk SSHN-10, 2015

8/K7/1B6/8/kb6/8/1Q1N4/8

#2

4 + 2

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Ba3
      • 2.Qb3#
    • 1...Bc3
      • 2.Qb3#
    • 1...Ba5
      • 2.Qb3#
    • 1...Bc5
      • 2.Qb3#
    • 1...Bd6
      • 2.Qb3#
    • 1...Be7
      • 2.Qb3#
    • 1...Bf8
      • 2.Qb3#
  • Tries
    • 1.Se4?
      • 1...Be1
        • 2.Sc5#
      • 1...Bd2
        • 2.Sc5#
      • 1...Ba3
        • 2.Sc3#
      • 1...Bc3
        • 2.Sxc3#
        • 2.Sc5#
      • 1...Ba5
        • 2.Sc5#
      • 1...Bc5
        • 2.Sc3#
        • 2.Sxc5#
      • 1...Bd6
        • 2.Sc3#
      • 1...Be7
        • 2.Sc3#
      • 1...Bf8
        • 2.Sc3#
      • 1...Kb5!
    • 1.Qa2+?
      • 1...Ba3
        • 2.Qb3#
      • 1...Kb5!
    • 1.Qc2+?
      • 1...Ka3
        • 2.Sb1#
        • 2.Sc4#
        • 2.Qb3#
      • 1...Kb5!
  • Keys
    • 1.Qd4!
      • 1...Ka3
        • 2.Qa1#
      • 1...Kb5
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • B(b);::QAB1(A)
    • B(b);P_PINB(C)::QAB1(A)
  • Tries
    • Try
      • S(B);
      • Vars
        • B(b);N_GUARD::S(B)
      • Refutation
        • K(a);P_SPINB(b),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • B(b);P_SPINB(b)::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);P_PINB(b)
    • Vars
      • K(a);N_SPINB(b),P-FLIGHT::QAR2(A)
      • K(a);N_SPINB(b),S_FLIGHT::QAB(A)
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