MESON Chess Problem Database

Problem Display
PID: 56206 (8/Q4p2/8/5K1k/8/8/8/8 w - - 0 1)

Ehrenstein, Moritz

Oesterreichische Lesehalle, 1881

8/Q4p2/8/5K1k/8/8/8/8

#2

2 + 2

4331 Schachminiaturen II 1903
5454 Near Snap 2009

SOLUTION

  • SOUND
  • Sets
    • 1...f6
      • 2.Qh7#
  • Tries
    • 1.Qg1?
      • threat
        • 2.Qh2#
        • 2.Qh1#
        • 2.Qg5#
      • 1...Kh4
        • 2.Qh2#
        • 2.Qg4#
      • 1...f6
        • 2.Qh2#
        • 2.Qh1#
      • 1...Kh6!
    • 1.Qe3?
      • threat
        • 2.Qg5#
        • 2.Qh3#
      • 1...f6
        • 2.Qh3#
      • 1...Kh4!
    • 1.Qd4?
      • threat
        • 2.Qh8#
      • 1...Kh6
        • 2.Qh8#
      • 1...f6!
    • 1.Qa1?
      • threat
        • 2.Qh8#
        • 2.Qh1#
      • 1...Kh6
        • 2.Qh8#
      • 1...f6
        • 2.Qh1#
      • 1...Kh4!
    • 1.Qa2?
      • threat
        • 2.Qh2#
      • 1...Kh4
        • 2.Qh2#
      • 1...Kh6!
    • 1.Qc7?
      • threat
        • 2.Qh2#
      • 1...Kh4
        • 2.Qh2#
      • 1...Kh6!
    • 1.Qe7?
      • threat
        • 2.Qg5#
      • 1...f6
        • 2.Qh7#
      • 1...Kh6!
    • 1.Qxf7+?
      • 1...Kh6
        • 2.Qg6#
      • 1...Kh4!
    • 1.Qa8?
      • threat
        • 2.Qh1#
        • 2.Qh8#
      • 1...Kh6
        • 2.Qh8#
      • 1...Kh4!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Qh2#
        • 2.Qh8#
      • 1...Kh4
        • 2.Qh2#
      • 1...Kh6
        • 2.Qh8#

Anticipated by 44561(1870)

This anticipates 4604(1882), 47232(1906), 22033(1923)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(b);OGATE::QAR2(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
      • Refutation
        • P(b);
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
        • P(b);::QAR(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • P(b);OGATE::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);CHECK,XP(b)
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • DUALS(2)
    • Vars
      • K(a);P-FLIGHT::QAR2(B)
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