MESON Chess Problem Database

Problem Display
PID: 224472 (5B2/8/8/2Npk2K/8/8/8/5Q2 w - - 0 1)

Fortier, May

Philadelphia Times, 1888

5B2/8/8/2Npk2K/8/8/8/5Q2

#2

4 + 2

5454 Near Snap 2020
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Kg4?
      • threat
        • 2.Qf4#
      • 1...d4
        • 2.Qf5#
      • 1...Kd4!
    • 1.Kg5?
      • threat
        • 2.Qf4#
        • 2.Qf6#
      • 1...d4
        • 2.Qf5#
      • 1...Kd4!
    • 1.Kg6?
      • threat
        • 2.Qf6#
      • 1...d4
        • 2.Qf5#
      • 1...Kd4!
    • 1.Bd6+?
      • 1...Kd4
        • 2.Qd3#
      • 1...Kxd6!
  • Keys
    • 1.Qc1!
      • 1...Kd4
        • 2.Bg7#
      • 1...Kf5
        • 2.Qg5#
      • 1...Kf6
        • 2.Qf4#
      • 1...d4
        • 2.Qg5#

Anticipated by 1967(1863), 62402(1879)

This anticipates 28904(1923), 57768(1995)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • QAB1(A)
      • Vars
        • P(a);SBLOCK::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • K(C);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • P(a);SBLOCK::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • K(C);S_FLIGHT
      • Threat
        • QAB1(A)
      • Vars
        • P(a);SBLOCK::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(D);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT,XB(D)
  • Actual
    • Q(A);
    • Vars
      • K(b);S_FLIGHT::B(D)
      • K(b);P-FLIGHT::QAR1(A)
      • K(b);S_FLIGHT::QAR2(A)
      • P(a);SBLOCK::QAR2(A)
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