MESON Chess Problem Database

Problem Display
PID: 207506 (8/8/8/Q7/8/2P2kbB/3P4/K2b4 w - - 0 1)

Martindale, Frank W

Chess Problems - Martindale, FW, 1872

8/8/8/Q7/8/2P2kbB/3P4/K2b4

#2

5 + 3

6490 yacpdb 2020
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qf5#
    • 1...Kf4
      • 2.Qf5#
  • Tries
    • 1.Qh5+?
      • 1...Ke4
        • 2.Qf5#
      • 1...Kf4
        • 2.Qf5#
      • 1...Kf2!
  • Keys
    • 1.Qg5!
      • threat
        • 2.Qe3#
      • 1...Ke2
        • 2.Qe3#
      • 1...Kf2
        • 2.Qe3#
      • 1...Ke4
        • 2.Qf5#
      • 1...Bf4
        • 2.Qg2#
      • 1...Bf2
        • 2.Qg4#

This anticipates 212972(1882), 5103(1899), 248100(1899), 64275(1926), 142031(1926)

There are these versions: 57310

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(b);S_FLIGHT::QAB1(E)
    • K(b);P-FLIGHT::QAR1(E)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(E)
        • K(b);P-FLIGHT::QAR1(E)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(E);
    • Threat
      • QAR1(E)
    • Vars
      • K(b);S_FLIGHT::QAR1(E)
      • K(b);P-FLIGHT::QAB1(E)
      • K(b);S_FLIGHT::QAB1(E)
      • B(c);OGATE,SBLOCK::QAB1(E)
      • B(c);SBLOCK::QAB1(E)
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