MESON Chess Problem Database

Problem Display
PID: 203243 (4K2B/8/8/1N1k4/8/1p6/1Q2P3/8 w - - 0 1)

Ingram, Jesse George

Chess Amateur (The), 1924

4K2B/8/8/1N1k4/8/1p6/1Q2P3/8

#2

5 + 2

6490 yacpdb 2020
5454 Near Snap 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qe5#
    • 1...Ke6
      • 2.Qe5#
  • Tries
    • 1.Qc3?
      • 1...Ke4
        • 2.Qe5#
        • 2.Qf3#
      • 1...Ke6
        • 2.Qe5#
      • 1...b2!
    • 1.Qd4+?
      • 1...Ke6
        • 2.Qe5#
        • 2.Qe4#
        • 2.Qd7#
      • 1...Kc6!
  • Keys
    • 1.Sa7!
      • 1...Kc4
        • 2.Qd4#
      • 1...Ke4
        • 2.Qe5#
      • 1...Kc5
        • 2.Qd4#
      • 1...Kd6
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#

This anticipates 231209(1927), 213411(1972)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAR1(A)
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(b);S_FLIGHT::QAR1(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(C);
    • Vars
      • K(b);S_FLIGHT::QAR1(A)
      • K(b);P-FLIGHT::QAB1(A)
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