MESON Chess Problem Database

Problem Display
PID: 250168 (7K/3N1p1p/1Q1p1R2/Nn1k4/1p5r/2b2P2/3q1n1B/3R4 w - - 0 1)

Lebedev, Alexey Nikolaevich

64 Shakhmatnoe obozrenie, 1927

7K/3N1p1p/1Q1p1R2/Nn1k4/1p5r/2b2P2/3q1n1B/3R4

#2

8 + 10

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Qxb5#
      • 2.Qc6#
      • 2.Qb7#
    • 1...Rd4
      • 2.Qxb5#
      • 2.Qc6#
      • 2.Qb7#
    • 1...Bd4
      • 2.Qc6#
      • 2.Qb7#
    • 1...Sa3
      • 2.Qxd6#
    • 1...Sd4
      • 2.Rxd6#
      • 2.Qxd6#
    • 1...Sa7
      • 2.Qxd6#
    • 1...Sc7
      • 2.Qxd6#
  • Keys
    • 1.Qe3!
      • threat
        • 2.Sb6#
      • 1...Bxf6+
        • 2.Sxf6#
      • 1...Qd4
        • 2.Qg5#
      • 1...Rd4
        • 2.Rf5#
      • 1...Bd4
        • 2.Qb3#
      • 1...Sd4
        • 2.Rxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • S(f);N_GUARD::QAR1(E),XP(h)
  • Actual
    • Q(E);
    • Threat
      • S(G)
    • Vars
      • B(c);CHECK,XR(F)::S(G),XB(c)
      • Q(a);S_CUTB(c)::QAR(E)
      • R(e);N_PINR(F),N_SPINQ(a)::R(F)
      • B(c);N_SPINQ(a),OGATE,SBLOCK::QAB(E)
      • S(f);N_PINR(F),N_SPINQ(a)::R1(F),XP(h)
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