MESON Chess Problem Database

Problem Display
PID: 169979 (1Q6/8/3B4/3k3N/P7/5R2/6K1/8 w - - 0 1)

Lincoln, Robert A

StrateGems, 2017

1Q6/8/3B4/3k3N/P7/5R2/6K1/8

#2

6 + 1

SOLUTION

  • SOUND
  • Tries
    • 1.Sf4+?
      • 1...Kc4
        • 2.Qb4#
      • 1...Kd4
        • 2.Qb4#
      • 1...Kc6
        • 2.Qc7#
      • 1...Ke4!
    • 1.Sf6+?
      • 1...Kc4
        • 2.Qb4#
      • 1...Kd4
        • 2.Qb4#
      • 1...Kc6
        • 2.Rc3#
        • 2.Qc7#
      • 1...Ke6!
    • 1.Qb5+?
      • 1...Kd4
        • 2.Qd3#
      • 1...Ke4
        • 2.Qd3#
        • 2.Qc4#
        • 2.Qe5#
      • 1...Ke6
        • 2.Rf6#
      • 1...Kxd6!
    • 1.Qb6?
      • 1...Kc4
        • 2.Qc5#
      • 1...Ke4
        • 2.Sf6#
      • 1...Ke6!
  • Keys
    • 1.Be5!
      • 1...Kc4
        • 2.Qb5#
      • 1...Ke4
        • 2.Sf6#
      • 1...Kc5
        • 2.Qb5#
      • 1...Kc6
        • 2.Qb5#
      • 1...Ke6
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(F)
        • K(a);P-FLIGHT::QAR2(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(F)
        • K(a);P-FLIGHT::QAR2(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(F)
        • K(a);S_FLIGHT::R1(B)
      • Refutation
        • K(a);P-FLIGHT,XB(E)
    • Try
      • Q(F);
      • Vars
        • K(a);S_FLIGHT::QAR1(F)
        • K(a);S_FLIGHT::S(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • B(E);
    • Vars
      • K(a);S_FLIGHT::QAB1(F)
      • K(a);S_FLIGHT::S(D)
      • K(a);P-FLIGHT::QAR1(F)
      • K(a);S_FLIGHT::QAR1(F)
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