MESON Chess Problem Database

Problem Display
PID: 7905 (N7/1kBR4/8/p7/4K3/Q7/8/8 w - - 0 1)

Banaszek, Marcin

The Problemist, 1994

N7/1kBR4/8/p7/4K3/Q7/8/8

#2

5 + 2

145 StrateGems 2016

SOLUTION

  • SOUND
  • Tries
    • 1.Bh2+?
      • 1...Ka6
        • 2.Qd3#
      • 1...Kxa8
        • 2.Qf8#
        • 2.Qxa5#
      • 1...Kc8
        • 2.Sb6#
      • 1...Kc6!
    • 1.Bg3+?
      • 1...Ka6
        • 2.Qd3#
      • 1...Kxa8
        • 2.Qf8#
        • 2.Qxa5#
      • 1...Kc8
        • 2.Sb6#
      • 1...Kc6!
    • 1.Bf4+?
      • 1...Ka6
        • 2.Qd3#
      • 1...Kxa8
        • 2.Qf8#
        • 2.Qxa5#
      • 1...Kc8
        • 2.Sb6#
      • 1...Kc6!
    • 1.Be5+?
      • 1...Ka6
        • 2.Qd3#
      • 1...Kxa8
        • 2.Qf8#
        • 2.Qxa5#
      • 1...Kc8
        • 2.Sb6#
      • 1...Kc6!
    • 1.Bb6+?
      • 1...Ka6
        • 2.Qd3#
        • 2.Qxa5#
      • 1...Kc6
        • 2.Qa4#
      • 1...Kxa8
        • 2.Qf8#
      • 1...Kb8
        • 2.Qf8#
      • 1...Kc8!
    • 1.Qb3+?
      • 1...Ka6
        • 2.Qb6#
      • 1...Kc6
        • 2.Qd5#
      • 1...Kxa8
        • 2.Qb8#
      • 1...Kc8
        • 2.Rd8#
      • 1...Ka7!
    • 1.Qxa5?
      • 1...Kc6
        • 2.Qd5#
      • 1...Kc8!
  • Keys
    • 1.Bd6+!
      • 1...Ka6
        • 2.Qd3#
      • 1...Kc6
        • 2.Qa4#
      • 1...Kxa8
        • 2.Qxa5#
      • 1...Kc8
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::QAB(A)
        • K(b);S_FLIGHT::S(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(C);CHECK
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::QAB(A)
        • K(b);S_FLIGHT::S(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(C);CHECK
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::QAB(A)
        • K(b);S_FLIGHT::S(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(C);CHECK
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::QAB(A)
        • K(b);S_FLIGHT::S(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(C);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB(A)
        • K(b);P_SPINP(a),S_FLIGHT,XS(E)::QAR(A)
        • K(b);P-FLIGHT::QAR(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(A)
        • K(b);S_FLIGHT::QAB1(A)
        • K(b);OGATE,S_FLIGHT,XS(E)::QAR1(A)
        • K(b);S_FLIGHT::R1(D)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);XP(a)
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • B(C);CHECK
    • Vars
      • K(b);P_SPINP(a),S_FLIGHT::QAB(A)
      • K(b);S_FLIGHT::QAB(A)
      • K(b);P_SPINP(a),S_FLIGHT,XS(E)::QAR(A),XP(a)
      • K(b);S_FLIGHT::S(E)
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