MESON Chess Problem Database

Problem Display
PID: 195034 (3K4/8/3b1Q2/3k4/3B2P1/3B4/3P4/8 w - - 0 1)

Janet, Frank

Pittsburgh Gazette-Times, 1918

3K4/8/3b1Q2/3k4/3B2P1/3B4/3P4/8

#2

6 + 2

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.Qf3#
  • Tries
    • 1.Bc4+?
      • 1...Ke4
        • 2.d3#
      • 1...Kc6
        • 2.Qf3#
      • 1...Kxc4!
    • 1.Qe5+?
      • 1...Kc6
        • 2.Be4#
        • 2.Qe4#
        • 2.Qb5#
      • 1...Bxe5!
    • 1.Qf3+?
      • 1...Ke6
        • 2.Bc4#
        • 2.Qf5#
      • 1...Kxd4!
    • 1.Qf7+?
      • 1...Kc6
        • 2.Qf3#
      • 1...Kxd4!
  • Keys
    • 1.Qe6+!
      • 1...Kxd4
        • 2.Qxd6#
      • 1...Kc6
        • 2.Qe4#
      • 1...Kxe6
        • 2.Bc4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);P_SPINB(b),S_FLIGHT::QAB(E)
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • K(a);S_FLIGHT::P(A)
        • K(a);P_SPINB(b),S_FLIGHT::QAB(E)
      • Refutation
        • K(a);S_FLIGHT,XB(B)
    • Try
      • Q(E);CHECK
      • Refutation
        • B(b);XQ(E)
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);P-FLIGHT,XB(C)
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB(E)
      • Refutation
        • K(a);P-FLIGHT,XB(C)
  • Actual
    • Q(E);CHECK
    • Vars
      • K(a);P-FLIGHT,XB(C)::QAR2(E),XB(b)
      • K(a);P_SPINB(b),S_FLIGHT::QAB(E)
      • K(a);S_FLIGHT,XQ(E)::B(B)
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