MESON Chess Problem Database

Problem Display
PID: 149058 (1Q6/8/8/3p2p1/3pkPP1/8/5PP1/1K6 w - - 0 1)

Weiss, Berthold

Good Companions (May Meredith Ty.), 1918

1Q6/8/8/3p2p1/3pkPP1/8/5PP1/1K6

#2

6 + 4

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Qe5#
  • Tries
    • 1.Kc2?
      • threat
        • 2.Qe5#
      • 1...gxf4
        • 2.Qe8#
      • 1...d3+!
    • 1.Qc7?
      • 1...Kd3
        • 2.Qc2#
      • 1...d3
        • 2.Qe5#
      • 1...gxf4!
    • 1.Qc8?
      • threat
        • 2.Qf5#
      • 1...Kd3
        • 2.Qc2#
      • 1...Kxf4
        • 2.Qf5#
      • 1...d3!
  • Keys
    • 1.Qb2!
      • 1...Kd3
        • 2.Qc2#
      • 1...Kxf4
        • 2.Qxd4#
      • 1...gxf4
        • 2.Qe2#
      • 1...d3
        • 2.Qe5#

This anticipates 65303(1922), 18421(1955)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(a);SBLOCK::QAR1(F)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • QAR1(F)
      • Vars
        • P(d);SBLOCK,XP(D)::QAR(F)
      • Refutation
        • P(a);CHECK
    • Try
      • Q(F);
      • Vars
        • K(b);S_FLIGHT::QAB1(F)
        • P(a);SBLOCK::QAR1(F)
      • Refutation
        • P(d);XP(D)
    • Try
      • Q(F);
      • Threat
        • QAB1(F)
      • Vars
        • K(b);S_FLIGHT::QAB1(F)
        • K(b);P-FLIGHT,XP(D)::QAR1(F)
      • Refutation
        • P(a);
  • Actual
    • Q(F);
    • Vars
      • K(b);S_FLIGHT::QAB1(F)
      • K(b);P-FLIGHT,XP(D)::QAR2(F),XP(a)
      • P(d);SBLOCK,XP(D)::QAR2(F)
      • P(a);OGATE,SBLOCK::QAR1(F)
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