MESON Chess Problem Database

Problem Display
PID: 15628 (q7/pk6/4B3/2Q5/3B4/2K5/8/8 w - - 0 1)

Lincoln, Robert A

Newark Star-Ledger, 1986

q7/pk6/4B3/2Q5/3B4/2K5/8/8

#2

4 + 3

2838 Fun with Chess Miniatures 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Kb8
      • 2.Qc8#
    • 1...Qc8
      • 2.Qxc8#
    • 1...a5
      • 2.Qb6#
    • 1...a6
      • 2.Qb6#
  • Tries
    • 1.Bd5+?
      • 1...Kb8
        • 2.Be5#
      • 1...Ka6!
    • 1.Bc8+?
      • 1...Kb8
        • 2.Be5#
      • 1...Qxc8!
    • 1.Qxa7+?
      • 1...Kc6
        • 2.Qb6#
        • 2.Qd7#
      • 1...Qxa7!
    • 1.Qe7+?
      • 1...Kc6
        • 2.Qd7#
      • 1...Kb8
        • 2.Be5#
      • 1...Ka6!
    • 1.Qc6+?
      • 1...Kb8
        • 2.Be5#
        • 2.Qc8#
      • 1...Kxc6!
    • 1.Qc7+?
      • 1...Ka6
        • 2.Bc4#
      • 1...Kxc7!
  • Keys
    • 1.Bd7!
      • 1...Ka6
        • 2.Qb5#
      • 1...Kb8
        • 2.Qc8#
      • 1...Qc8
        • 2.Qxc8#
      • 1...Qd8
        • 2.Qxa7#
      • 1...Qe8
        • 2.Qxa7#
      • 1...Qf8
        • 2.Qxa7#
      • 1...Qg8
        • 2.Qxa7#
      • 1...Qh8
        • 2.Qxa7#
      • 1...Qb8
        • 2.Qc6#
      • 1...a5
        • 2.Qb6#
      • 1...a6
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR1(C)
    • Q(c);N_GUARD,P_PINQ(C)::QAB1(C),XQ(c)
    • P(a);N_GUARD::QAR1(C)
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • K(b);P-FLIGHT::B(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(D);CHECK
      • Vars
        • K(b);P-FLIGHT::B(B)
      • Refutation
        • Q(c);P_PINQ(C),XB(D)
    • Try
      • Q(C);CHECK,XP(a)
      • Refutation
        • Q(c);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(C)
        • K(b);P-FLIGHT::B(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • K(b);S_FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);S_FLIGHT::B(D)
      • Refutation
        • K(b);P-FLIGHT,XQ(C)
  • Actual
    • B(D);
    • Vars
      • K(b);S_FLIGHT::QAB1(C)
      • K(b);P-FLIGHT::QAR1(C)
      • Q(c);N_GUARD,P_PINQ(C)::QAB1(C),XQ(c)
      • Q(c);N_GUARD::QAR1(C),XP(a)
      • Q(c);N_GUARD,P_PINB(B)::QAR1(C),XP(a)
      • Q(c);SBLOCK::QAB1(C)
      • P(a);N_GUARD::QAR1(C)
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