MESON Chess Problem Database

Problem Display
PID: 176196 (8/3Q4/8/n2K4/8/6n1/R7/2k5 w - - 0 1)

Renn, Albert

Schach-Echo, 1971

8/3Q4/8/n2K4/8/6n1/R7/2k5

#2

3 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Qa4?
      • threat
        • 2.Qc2#
      • 1...Kb1
        • 2.Qc2#
      • 1...Sb3!
    • 1.Qf5?
      • threat
        • 2.Qc2#
      • 1...Kd1
        • 2.Qb1#
      • 1...Se4
        • 2.Qf1#
      • 1...Sxf5!
    • 1.Qg7?
      • threat
        • 2.Qa1#
      • 1...Kb1
        • 2.Qa1#
        • 2.Qb2#
      • 1...Kd1
        • 2.Qa1#
      • 1...Sb3!
  • Keys
    • 1.Qh7!
      • threat
        • 2.Qc2#
      • 1...Kd1
        • 2.Qb1#
      • 1...Se4
        • 2.Qh1#
      • 1...Sf5
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • S(c);
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
        • S(b);N_GUARD::QAR(C)
      • Refutation
        • S(b);XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAR2(C)
      • Vars
        • K(a);P-FLIGHT::QAR(C)
      • Refutation
        • S(c);
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • K(a);P-FLIGHT::QAR2(C)
      • S(b);N_GUARD::QAR(C)
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