MESON Chess Problem Database

Problem Display
PID: 216563 (8/3B4/3p4/2pk4/5p2/5P2/2PPK3/Q7 w - - 0 1)

Klaar, Jan

Deutsche Schachzeitung, 1887

8/3B4/3p4/2pk4/5p2/5P2/2PPK3/Q7

#2

6 + 4

15148 Sadier Collection 2020
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Qa8+?
      • 1...Kc4
        • 2.Qe4#
      • 1...Kd4
        • 2.Qe4#
      • 1...Ke5!
  • Keys
    • 1.c3!
      • 1...Kc4
        • 2.Qa2#
      • 1...Ke5
        • 2.c4#
      • 1...c4
        • 2.Qa5#

This anticipates 121454(1947)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAR2(A)
        • K(c);OGATE,P-FLIGHT::QAR1(A)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • P(B);
    • Vars
      • K(c);S_FLIGHT::QAB(A)
      • K(c);P-FLIGHT::QAB(A)+P(B)
      • P(b);OGATEB,SBLOCK::QAR(A)
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