MESON Chess Problem Database

Problem Display
PID: 16007 (5K2/2Q2n2/8/3k4/3P4/3P4/3N4/3R4 w - - 0 1)

Surkov, Ruslan Albertovich

Die Schwalbe, 2000

5K2/2Q2n2/8/3k4/3P4/3P4/3N4/3R4

#2

6 + 2

23 Die Schwalbe 2003

SOLUTION

  • SOUND
  • Sets
    • 1...Sg5
      • 2.Qd7#
    • 1...Sh6
      • 2.Qd7#
    • 1...Sd8
      • 2.Qd7#
    • 1...Sh8
      • 2.Qd7#
  • Tries
    • 1.Ke7?
      • threat
        • 2.Qc4#
        • 2.Qc5#
      • 1...Se5
        • 2.Qd6#
        • 2.Qc5#
      • 1...Sd6
        • 2.Qxd6#
        • 2.Qc5#
      • 1...Kxd4!
    • 1.Sc4?
      • 1...Ke6
        • 2.Qxf7#
      • 1...Se5
        • 2.Qd6#
      • 1...Sg5
        • 2.Qd6#
        • 2.Qd7#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sh6
        • 2.Qd6#
        • 2.Qd7#
      • 1...Sd8
        • 2.Qd6#
        • 2.Qd7#
      • 1...Sh8
        • 2.Qd6#
        • 2.Qd7#
      • 1...Kxd4!
    • 1.Re1?
      • threat
        • 2.Qc5#
      • 1...Kxd4
        • 2.Qc4#
      • 1...Se5!
  • Keys
    • 1.Se4!
      • threat
        • 2.Qc4#
      • 1...Kxd4
        • 2.Qc5#
      • 1...Ke6
        • 2.Qxf7#
      • 1...Se5
        • 2.Qd6#
      • 1...Sd6
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • S(b);N_GUARD::QAR2(E)
  • Tries
    • Try
      • K(F);S_FLIGHT
      • Threat
        • DUALS(2)
      • Refutation
        • K(a);P-FLIGHT,XP(D)
    • Try
      • S(B);
      • Vars
        • K(a);S_FLIGHT::QAB1(E),XS(b)
        • S(b);N_GUARD::QAR1(E)
        • S(b);N_GUARD::QAR1(E),XS(b)
      • Refutation
        • K(a);P-FLIGHT,XP(D)
    • Try
      • R(A);
      • Threat
        • QAR1(E)
      • Vars
        • K(a);P-FLIGHT,XP(D)::QAR1(E)
      • Refutation
        • S(b);
  • Actual
    • S(B);
    • Threat
      • QAB1(E)
    • Vars
      • K(a);P-FLIGHT,XP(D)::QAB1(E)
      • K(a);S_FLIGHT::QAB1(E),XS(b)
      • S(b);N_GUARD::QAR1(E)
      • S(b);N_GUARD::QAR1(E),XS(b)
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