MESON Chess Problem Database

Problem Display
PID: 249371 (8/2K2p2/4kp2/2Q3p1/8/3P4/8/8 w - - 0 1)

Gold, Samuel

Deutsche Schachzeitung, 1894

8/2K2p2/4kp2/2Q3p1/8/3P4/8/8

#2

3 + 4

5454 Near Snap 2021
6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...f5
      • 2.Qd6#
  • Tries
    • 1.Kc6?
      • 1...f5
        • 2.Qd6#
      • 1...g4!
    • 1.Qe3+?
      • 1...Kf5
        • 2.Qe4#
      • 1...Kd5!
    • 1.Qd4?
      • threat
        • 2.Qe4#
      • 1...Kf5
        • 2.Qe4#
      • 1...f5
        • 2.Qd6#
      • 1...Ke7!
    • 1.Qe7+?
      • 1...Kd5
        • 2.Qd6#
      • 1...Kf5
        • 2.Qe4#
      • 1...Kxe7!
    • 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.d4?
      • 1...f5
        • 2.Qd6#
        • 2.Qe5#
      • 1...g4!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qe4#
      • 1...Kd5
        • 2.Qd6#
      • 1...Ke5
        • 2.Qe4#
      • 1...Kf5
        • 2.Qe4#
      • 1...f5
        • 2.Qd6#

Anticipated by 2841(1887)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::QAR1(B)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • P(a);
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
        • K(b);OGATE,S_FLIGHT::QAB1(B)
      • Refutation
        • K(b);P-FLIGHT,XQ(B)
    • 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
      • P(A);
      • Refutation
        • P(a);
  • 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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