MESON Chess Problem Database

Problem Display
PID: 175529 (3K4/3N1Q2/8/k7/p1P5/8/3P4/8 w - - 0 1)

Zimmermann, Stepan

Source?, 1900

3K4/3N1Q2/8/k7/p1P5/8/3P4/8

#2

5 + 2

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Qd5+?
      • 1...Ka6
        • 2.Qa8#
      • 1...Kb4!
    • 1.Qf6?
      • threat
        • 2.Qb6#
      • 1...Kb4
        • 2.Qc3#
      • 1...a3!
    • 1.Qe7?
      • 1...a3
        • 2.Qxa3#
      • 1...Ka6!
    • 1.Qf8?
      • 1...a3
        • 2.Qxa3#
      • 1...Ka6!
  • Keys
    • 1.Qf3!
      • 1...Kb4
        • 2.Qc3#
      • 1...Ka6
        • 2.Qa8#
      • 1...a3
        • 2.Qxa3#

This anticipates 109642(1991)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(D)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(D);
      • Threat
        • QAB1(D)
      • Vars
        • K(b);S_FLIGHT::QAB1(D)
      • Refutation
        • P(a);
    • Try
      • Q(D);
      • Vars
        • P(a);OGATEB::QAR2(D),XP(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(D);
      • Vars
        • P(a);OGATEB::QAR2(D),XP(a)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(D);
    • Vars
      • K(b);S_FLIGHT::QAB1(D)
      • K(b);P-FLIGHT::QAR2(D)
      • P(a);OGATEB::QAR2(D),XP(a)
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