MESON Chess Problem Database

Problem Display
PID: 234450 (4Q3/8/8/8/5P1K/5k1N/2P5/7b w - - 0 1)

Lincoln, Robert A

ChessStar, 2013

4Q3/8/8/8/5P1K/5k1N/2P5/7b

#2

5 + 2

15148 Sadier Collection 2021
3713 Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kg2
      • 2.Qe2#
  • Tries
    • 1.Qg6?
      • 1...Ke3
        • 2.Qd3#
      • 1...Bg2
        • 2.Qd3#
      • 1...Ke2!
    • 1.Qe1?
      • 1...Kg2
        • 2.Qf2#
        • 2.Qe2#
      • 1...Bg2!
    • 1.Qe3+?
      • 1...Kg2
        • 2.Qf2#
        • 2.Qe2#
      • 1...Kxe3!
    • 1.Qe5?
      • 1...Kg2
        • 2.Qe2#
      • 1...Bg2!
    • 1.Qe6?
      • 1...Kg2
        • 2.Qe2#
      • 1...Bg2!
    • 1.Qe7?
      • 1...Kg2
        • 2.Qe2#
      • 1...Bg2!
    • 1.c3?
      • 1...Kg2
        • 2.Qe2#
      • 1...Bg2!
    • 1.c4?
      • 1...Kg2
        • 2.Qe2#
      • 1...Bg2!
    • 1.f5?
      • 1...Kg2
        • 2.Qe2#
      • 1...Bg2!
  • Keys
    • 1.Qb5!
      • 1...Kg2
        • 2.Qe2#
      • 1...Ke3
        • 2.Qd3#
      • 1...Ke4
        • 2.Qd3#
      • 1...Bg2
        • 2.Qd3#

Anticipated by 5974(1926)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAR2(E)
  • Tries
    • Try
      • Q(E);
      • Vars
        • K(b);P-FLIGHT::QAR1(E)
        • B(a);SBLOCK::QAR2(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);
      • Refutation
        • B(a);
    • Try
      • Q(E);CHECK
      • Refutation
        • K(b);P-FLIGHT,XQ(E)
    • Try
      • Q(E);
      • Vars
        • K(b);S_FLIGHT::QAR2(E)
      • Refutation
        • B(a);
    • Try
      • Q(E);
      • Vars
        • K(b);S_FLIGHT::QAR2(E)
      • Refutation
        • B(a);
    • Try
      • Q(E);
      • Vars
        • K(b);S_FLIGHT::QAR2(E)
      • Refutation
        • B(a);
    • Try
      • P(A);
      • Vars
        • K(b);S_FLIGHT::QAR2(E)
      • Refutation
        • B(a);
    • Try
      • P(A);
      • Vars
        • K(b);S_FLIGHT::QAR2(E)
      • Refutation
        • B(a);
    • Try
      • P(C);
      • Vars
        • K(b);S_FLIGHT::QAR2(E)
      • Refutation
        • B(a);
  • Actual
    • Q(E);
    • Vars
      • K(b);S_FLIGHT::QAR2(E)
      • K(b);P-FLIGHT::QAR1(E)
      • K(b);S_FLIGHT::QAB1(E)
      • B(a);SBLOCK::QAR2(E)
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