MESON Chess Problem Database

Problem Display
PID: 2841 (8/2K2p2/4kp2/1Q4p1/8/3P4/8/8 w - - 0 1)

Loyd, Sam

Source?, 1887

8/2K2p2/4kp2/1Q4p1/8/3P4/8/8

#2

3 + 4

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qc4+?
      • 1...Ke5
        • 2.Qe4#
      • 1...Kf5
        • 2.Qe4#
      • 1...Ke7!
    • 1.Qc6+?
      • 1...Ke5
        • 2.Qe4#
      • 1...Kf5
        • 2.Qe4#
      • 1...Ke7!
    • 1.Qe8+?
      • 1...Kf5
        • 2.Qe4#
      • 1...Kd5!
    • 1.Qc5?
      • 1...f5
        • 2.Qd6#
      • 1...g4!
    • 1.d4?
      • threat
        • 2.Qd7#
      • 1...f5
        • 2.Qe5#
      • 1...Ke7!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qe4#
      • 1...Kd5
        • 2.Qd6#
      • 1...Ke5
        • 2.Qe4#
      • 1...Kf5
        • 2.Qe4#
      • 1...f5
        • 2.Qd6#

This anticipates 249371(1894)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
        • K(b);S_FLIGHT::QAB1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
        • K(b);S_FLIGHT::QAB1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • P(a);
    • Try
      • P(A);
      • Threat
        • QAB1(B)
      • Vars
        • P(c);N_GUARD::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAR2(B)
    • Vars
      • K(b);S_FLIGHT::QAR1(B)
      • K(b);P-FLIGHT::QAR1(B)
      • K(b);S_FLIGHT::QAB1(B)
      • P(c);SBLOCK::QAR1(B)
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