MESON Chess Problem Database

Problem Display
PID: 224225 (8/3K4/B7/4N3/3k4/6Q1/8/8 w - - 0 1)

Ladd, Herbert T

Brownson's Chess Journal, 1887

8/3K4/B7/4N3/3k4/6Q1/8/8

#2

4 + 1

5454 Near Snap 2020
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Sc4?
      • 1...Kc5
        • 2.Qd6#
      • 1...Kd5
        • 2.Qe5#
      • 1...Ke4!
    • 1.Sg4?
      • threat
        • 2.Qe5#
      • 1...Kc5
        • 2.Qd6#
      • 1...Kd5
        • 2.Qe5#
      • 1...Ke4!
    • 1.Sf7?
      • threat
        • 2.Qe5#
      • 1...Kc5
        • 2.Qd6#
      • 1...Kd5
        • 2.Qe5#
      • 1...Ke4!
    • 1.Qd3+?
      • 1...Kc5
        • 2.Qd6#
      • 1...Kxe5!
    • 1.Qe3+?
      • 1...Kd5
        • 2.Bc4#
        • 2.Bb7#
      • 1...Kxe3!
  • Keys
    • 1.Sg6!
      • threat
        • 2.Qe5#
      • 1...Ke4
        • 2.Qd3#
      • 1...Kc5
        • 2.Qd6#
      • 1...Kd5
        • 2.Qe5#

This anticipates 157524(1942), 95037(1975)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(B);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(B);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT,XS(B)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
  • Actual
    • S(B);
    • Threat
      • QAB1(A)
    • Vars
      • K(a);P-FLIGHT::QAB1(A)
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);P-FLIGHT::QAR1(A)
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