MESON Chess Problem Database

Problem Display
PID: 153286 (3B4/8/3Q4/8/8/pk6/2bR4/2K5 w - - 0 1)

Lincoln, Robert A

StrateGems, 2012

3B4/8/3Q4/8/8/pk6/2bR4/2K5

#2

4 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Ba5?
      • 1...Ka4
        • 2.Qb4#
      • 1...Kc4
        • 2.Qb4#
        • 2.Qd5#
      • 1...Bb1
        • 2.Qb4#
      • 1...Bd1
        • 2.Qb4#
      • 1...Bd3
        • 2.Qb4#
      • 1...Be4
        • 2.Qb4#
      • 1...Bf5
        • 2.Qb4#
      • 1...Bg6
        • 2.Qb4#
      • 1...Bh7
        • 2.Qb4#
      • 1...a2
        • 2.Qb4#
      • 1...Ka2!
    • 1.Qb4+?
      • 1...Ka2
        • 2.Qb1#
      • 1...Kxb4!
    • 1.Qd5+?
      • 1...Kc3
        • 2.Ba5#
      • 1...Ka4
        • 2.Rd4#
        • 2.Qc4#
      • 1...Kb4!
    • 1.Qe6+?
      • 1...Kc3
        • 2.Ba5#
      • 1...Ka4
        • 2.Qc4#
      • 1...Kb4!
  • Keys
    • 1.Be7!
      • 1...Ka2
        • 2.Qxa3#
      • 1...Kc3
        • 2.Qb4#
      • 1...Ka4
        • 2.Qb4#
      • 1...Kc4
        • 2.Qb4#
      • 1...Bb1
        • 2.Qb4#
      • 1...Bd1
        • 2.Qb4#
      • 1...Bd3
        • 2.Qb4#
      • 1...Be4
        • 2.Qb4#
      • 1...Bf5
        • 2.Qb4#
      • 1...Bg6
        • 2.Qb4#
      • 1...Bh7
        • 2.Qb4#
      • 1...a2
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(D);
      • Vars
        • K(c);S_FLIGHT::QAR1(C)
        • B(a);::QAR1(C)
        • P(b);SBLOCK::QAR1(C)
      • Refutation
        • K(c);P_SPINB(a),S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);OGATE,P_SPINB(a),S_FLIGHT::QAB1(C)
      • Refutation
        • K(c);P-FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);P-FLIGHT::B(D)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);P-FLIGHT::B(D)
        • K(c);S_FLIGHT::QAR2(C)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • B(D);
    • Vars
      • K(c);P_SPINB(a),S_FLIGHT::QAR1(C),XP(b)
      • K(c);P-FLIGHT::QAB1(C)
      • K(c);S_FLIGHT::QAR1(C)
      • B(a);::QAR1(C)
      • P(b);SBLOCK::QAR1(C)
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