MESON Chess Problem Database

Problem Display
PID: 11638 (5K1k/8/5N1r/7P/1Q6/8/8/1B6 w - - 0 1)

Lider, Valentin Viktorovich

Platov MT, 1970

5K1k/8/5N1r/7P/1Q6/8/8/1B6

#2

5 + 2

3296 Shakhmatny zadachi miniaturi 1987
145 StrateGems 2008

SOLUTION

  • SOUND
  • Tries
    • 1.Qc3?
      • 1...Rxf6+
        • 2.Qxf6#
      • 1...Rxh5
        • 2.Sxh5#
      • 1...Rh7
        • 2.Sxh7#
      • 1...Rg6!
    • 1.Qb2?
      • 1...Rxf6+
        • 2.Qxf6#
      • 1...Rxh5
        • 2.Sxh5#
      • 1...Rh7
        • 2.Sxh7#
      • 1...Rg6!
    • 1.Qd4?
      • 1...Rxf6+
        • 2.Qxf6#
      • 1...Rxh5
        • 2.Sxh5#
      • 1...Rh7
        • 2.Sxh7#
      • 1...Rg6!
    • 1.Qh4?
      • 1...Rxf6+
        • 2.Qxf6#
      • 1...Rxh5
        • 2.Qxh5#
      • 1...Rg6
        • 2.hxg6#
      • 1...Rh7!
    • 1.Qb7?
      • threat
        • 2.Qg7#
      • 1...Rg6
        • 2.Qh7#
      • 1...Rh7
        • 2.Qxh7#
      • 1...Rxf6+!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qg7#
      • 1...Rxf6+
        • 2.Qxf6#
      • 1...Rg6
        • 2.Qh7#
      • 1...Rh7
        • 2.Qxh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);
      • Vars
        • R(a);CHECK,OGATE,P_SPINR(a),XS(D)::QAB(B),XR(a)
        • R(a);XP(C)::QAB(B)+S(D),XR(a)
        • R(a);N_GUARD::QAB(B)+S(D),XR(a)
      • Refutation
        • R(a);
    • Try
      • Q(B);
      • Vars
        • R(a);CHECK,OGATE,P_SPINR(a),XS(D)::QAB(B),XR(a)
        • R(a);XP(C)::QAB(B)+S(D),XR(a)
        • R(a);N_GUARD::QAB(B)+S(D),XR(a)
      • Refutation
        • R(a);
    • Try
      • Q(B);
      • Vars
        • R(a);CHECK,OGATE,P_SPINR(a),XS(D)::QAB(B),XR(a)
        • R(a);XP(C)::QAB(B)+S(D),XR(a)
        • R(a);N_GUARD::QAB(B)+S(D),XR(a)
      • Refutation
        • R(a);
    • Try
      • Q(B);
      • Vars
        • R(a);CHECK,OGATE,XS(D)::QAB(B),XR(a)
        • R(a);OGATE,P_SPINR(a),XP(C)::QAR(B),XR(a)
        • R(a);OGATE::QAR(B)+P(C),XR(a)
      • Refutation
        • R(a);
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • R(a);N_GUARD::QAR1(B)
        • R(a);N_GUARD::QAR1(B),XR(a)
      • Refutation
        • R(a);CHECK,XS(D)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • R(a);CHECK,OGATE,XS(D)::QAB(B),XR(a)
      • R(a);N_GUARD::QAR1(B)
      • R(a);N_GUARD::QAR1(B),XR(a)
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