MESON Chess Problem Database

Problem Display
PID: 70085 (4B3/8/8/3pp3/8/3k2K1/1Q6/3N4 w - - 0 1)

Lincoln, Robert A

4th Comm., Amirov MT, 2005

4B3/8/8/3pp3/8/3k2K1/1Q6/3N4

#2

4 + 3

145 StrateGems 2006

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qc3#
    • 1...Ke4
      • 2.Bg6#
    • 1...e4
      • 2.Bb5#
  • Tries
    • 1.Kf2?
      • 1...Kc4
        • 2.Qc3#
      • 1...d4
        • 2.Qe2#
      • 1...e4
        • 2.Bb5#
        • 2.Qc3#
      • 1...Ke4!
    • 1.Kf3?
      • threat
        • 2.Bb5#
        • 2.Qc3#
      • 1...Kc4
        • 2.Qc3#
      • 1...d4
        • 2.Bb5#
        • 2.Qe2#
      • 1...e4+!
    • 1.Kg4?
      • 1...Kc4
        • 2.Qc3#
      • 1...Ke4
        • 2.Bg6#
      • 1...e4
        • 2.Bb5#
      • 1...d4!
    • 1.Bh5?
      • 1...Ke4
        • 2.Bg6#
      • 1...d4
        • 2.Qe2#
      • 1...e4
        • 2.Be2#
        • 2.Qc3#
      • 1...Kc4!
    • 1.Qc3+?
      • 1...Ke4
        • 2.Bg6#
      • 1...Ke2!
    • 1.Qd2+?
      • 1...Kc4
        • 2.Qc3#
      • 1...Ke4
        • 2.Bg6#
      • 1...Kxd2!
  • Keys
    • 1.Ba4!
      • 1...Kc4
        • 2.Qc3#
      • 1...Ke4
        • 2.Bc2#
      • 1...d4
        • 2.Qc2#
      • 1...e4
        • 2.Bb5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAR1(B)
    • K(a);S_FLIGHT::B(D)
    • P(c);SBLOCK::B(D)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
        • P(b);SBLOCK::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(C);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • P(c);CHECK
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
        • K(a);S_FLIGHT::B(D)
        • P(c);SBLOCK::B(D)
      • Refutation
        • P(b);
    • Try
      • B(D);
      • Vars
        • K(a);S_FLIGHT::B(D)
        • P(b);SBLOCK::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT::B(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
        • K(a);S_FLIGHT::B(D)
      • Refutation
        • K(a);P-FLIGHT,XQ(B)
  • Actual
    • B(D);
    • Vars
      • K(a);S_FLIGHT::QAR1(B)
      • K(a);S_FLIGHT::B(D)
      • P(b);SBLOCK::QAB1(B)
      • P(c);SBLOCK::B(D)
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