MESON Chess Problem Database

Problem Display
PID: 261928 (4k2r/1p5p/4K3/8/8/8/8/4Q3 w - - 0 1)

Speckmann, Werner

Problemnoter, 1962

4k2r/1p5p/4K3/8/8/8/8/4Q3

#2

2 + 4

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Qc3?
      • threat
        • 2.Qxh8#
        • 2.Qc8#
      • 1...Kf8
        • 2.Qxh8#
      • 1...Rf8
        • 2.Qc8#
      • 1...Rg8
        • 2.Qc8#
      • 1...Kd8!
    • 1.Qg3?
      • threat
        • 2.Qb8#
      • 1...Kd8
        • 2.Qb8#
      • 1...Kf8!
    • 1.Qa1?
      • threat
        • 2.Qxh8#
        • 2.Qa8#
      • 1...Kf8
        • 2.Qxh8#
      • 1...Rf8
        • 2.Qa8#
      • 1...Rg8
        • 2.Qa8#
      • 1...Kd8!
  • Keys
    • 1.Qe5!
      • threat
        • 2.Qb8#
        • 2.Qxh8#
      • 1...Kd8
        • 2.Qb8#
      • 1...Kf8
        • 2.Qxh8#
      • 1...Rg8
        • 2.Qb8#
      • 1...Rf8
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT::QAR2(A),XR(d)
        • R(d);SBLOCK::QAR2(A)
        • R(d);::QAR2(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT::QAR2(A),XR(d)
        • R(d);SBLOCK::QAR(A)
        • R(d);::QAR(A)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • DUALS(2)
    • Vars
      • K(c);P-FLIGHT::QAR2(A)
      • K(c);P-FLIGHT::QAR2(A),XR(d)
      • R(d);::QAR(A)
      • R(d);SBLOCK::QAR(A)
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