MESON Chess Problem Database

Problem Display
PID: 195056 (8/8/4Q3/1K2bP1B/2N1k3/4P3/8/8 w - - 0 1)

Janet, Frank

Pittsburgh Gazette-Times, 1918

8/8/4Q3/1K2bP1B/2N1k3/4P3/8/8

#2

6 + 2

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Qc6+?
      • 1...Kxf5
        • 2.Qg6#
      • 1...Kd3!
    • 1.Qe7?
      • 1...Kd5
        • 2.Bf3#
        • 2.Qxe5#
        • 2.Qb7#
      • 1...Kxf5
        • 2.Qxe5#
      • 1...Kd3!
    • 1.Qe8?
      • 1...Kd5
        • 2.Bf3#
        • 2.Qc6#
        • 2.Qxe5#
        • 2.Qa8#
      • 1...Kxf5
        • 2.Qg6#
        • 2.Qxe5#
      • 1...Kd3!
  • Keys
    • 1.Qd5+!
      • 1...Kxd5
        • 2.Bf3#
      • 1...Kxf5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(F);CHECK,N_PINB(b)
      • Vars
        • K(a);OGATEB,S_FLIGHT,XP(D)::QAB1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(a);N_SPINB(b),S_FLIGHT,XP(D)::QAR1(F),XB(b)
      • Refutation
        • K(a);N_SPINB(b),S_FLIGHT
    • Try
      • Q(F);
      • Refutation
        • K(a);N_SPINB(b),S_FLIGHT
  • Actual
    • Q(F);CHECK,N_PINB(b)
    • Vars
      • K(a);S_FLIGHT,XQ(F)::B(E)
      • K(a);P_SPINB(b),S_FLIGHT,XP(D)::QAR1(F),XB(b)
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