MESON Chess Problem Database

Problem Display
PID: 135622 (b3R3/Q2p4/2k5/8/8/1K1N4/8/8 w - - 0 1)

Lincoln, Robert A

StrateGems, 2010

b3R3/Q2p4/2k5/8/8/1K1N4/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qc5#
      • 2.Qxd7#
    • 1...Kd6
      • 2.Qc5#
    • 1...Bb7
      • 2.Qc5#
  • Tries
    • 1.Kb4?
      • 1...Kd5
        • 2.Qc5#
        • 2.Qxd7#
      • 1...Kd6
        • 2.Qc5#
      • 1...Bb7
        • 2.Qc5#
      • 1...d5
        • 2.Re6#
      • 1...d6!
    • 1.Kc4?
      • 1...Kd6
        • 2.Qc5#
      • 1...Bb7
        • 2.Qc5#
      • 1...d6
        • 2.Sb4#
        • 2.Rc8#
      • 1...d5+!
    • 1.Re5?
      • 1...Kd6
        • 2.Qc5#
      • 1...Bb7
        • 2.Qc5#
      • 1...d6
        • 2.Sb4#
      • 1...d5!
    • 1.Qb6+?
      • 1...Kd5
        • 2.Sb4#
        • 2.Sf4#
        • 2.Re5#
        • 2.Qc5#
      • 1...Kxb6!
    • 1.Qa6+?
      • 1...Kc7
        • 2.Rc8#
      • 1...Kd5!
  • Keys
    • 1.Ka4!
      • 1...Kd5
        • 2.Qc5#
      • 1...Kd6
        • 2.Qc5#
      • 1...Bb7
        • 2.Qc5#
      • 1...d5
        • 2.Re6#
      • 1...d6
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAB1(C)
    • B(c);SBLOCK::QAR1(C)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
        • B(c);SBLOCK::QAR1(C)
        • P(b);N_GUARD,SBLOCK::R(D)
      • Refutation
        • P(b);
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
        • B(c);SBLOCK::QAR1(C)
      • Refutation
        • P(b);CHECK
    • Try
      • R(D);
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
        • B(c);SBLOCK::QAR1(C)
        • P(b);SBLOCK::S(B)
      • Refutation
        • P(b);
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::R1(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • K(A);S_FLIGHT
    • Vars
      • K(a);S_FLIGHT::QAR1(C)
      • K(a);P-FLIGHT::QAB1(C)
      • B(c);SBLOCK::QAR1(C)
      • P(b);N_GUARD,SBLOCK::R(D)
      • P(b);SBLOCK::S(B)
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