MESON Chess Problem Database

Problem Display
PID: 165470 (8/8/5Q2/3k4/8/8/2K1P3/2B2B2 w - - 0 1)

Lincoln, Robert A

The Problemist, 2017

8/8/5Q2/3k4/8/8/2K1P3/2B2B2

#2

5 + 1

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Bg2#
  • Tries
    • 1.Kb3?
      • 1...Ke4
        • 2.Bg2#
      • 1...Kc5!
    • 1.Kc3?
      • 1...Ke4
        • 2.Bg2#
        • 2.Qe6#
      • 1...Kc5!
    • 1.Ba3?
      • 1...Kc4
        • 2.e4#
      • 1...Ke4!
    • 1.Be3?
      • 1...Ke4
        • 2.Qe6#
      • 1...Kc4!
    • 1.e3?
      • 1...Ke4
        • 2.Bg2#
      • 1...Kc5!
  • Keys
    • 1.e4+!
      • 1...Kxe4
        • 2.Bg2#
      • 1...Kc5
        • 2.Ba3#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::B(B)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(a);S_FLIGHT::B(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(C);P-FLIGHT
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(A);
      • Vars
        • K(a);S_FLIGHT::B(B)+P(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(A);
      • Vars
        • K(a);S_FLIGHT::QAR2(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(D);
      • Vars
        • K(a);S_FLIGHT::B(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • P(D);CHECK
    • Vars
      • K(a);S_FLIGHT,XP(D)::B(B)
      • K(a);P-FLIGHT::B(A)
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