MESON Chess Problem Database

Problem Display
PID: 6502 (5k2/1K3B1q/5Q1N/5R2/8/8/8/8 w - - 0 1)

Lebedev, Aleksandr N

Zadachi i Etyudi, 1929

5k2/1K3B1q/5Q1N/5R2/8/8/8/8

#2

5 + 2

3296 Shakhmatny zadachi miniaturi 1987
3813 300 Sachmatu Uzdaviniu 1991

SOLUTION

  • SOUND
  • Sets
    • 1...Qg6
      • 2.Bxg6#
    • 1...Qxf7+
      • 2.Qxf7#
    • 1...Qg7
      • 2.Qd8#
      • 2.Qd6#
  • Tries
    • 1.Rd5?
      • threat
        • 2.Rd8#
      • 1...Qxf7+
        • 2.Qxf7#
      • 1...Qd3
        • 2.Bh5#
        • 2.Bg6#
      • 1...Qe4
        • 2.Bh5#
        • 2.Bg6#
      • 1...Qb1+!
  • Keys
    • 1.Re5!
      • threat
        • 2.Re8#
      • 1...Qb1+
        • 2.Bb3#
      • 1...Qe4+
        • 2.Bd5#
      • 1...Qxf7+
        • 2.Qxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(a);N_PINB(E)::QAR(B)+B(E),XQ(a)
    • Q(a);CHECK,P_SPINQ(a),XB(E)::QAR1(B),XQ(a)
  • Tries
    • Try
      • R(A);
      • Threat
        • R(A)
      • Vars
        • Q(a);CHECK,P_SPINQ(a),XB(E)::QAR1(B),XQ(a)
      • Refutation
        • Q(a);CHECK,N_PINB(E)
  • Actual
    • R(A);
    • Threat
      • R1(A)
    • Vars
      • Q(a);CHECK,N_PINB(E)::QAR(B)+B(E)
      • Q(a);CHECK,P_SPINQ(a),XB(E)::QAR1(B),XQ(a)
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