MESON Chess Problem Database

Problem Display
PID: 180525 (1rN2k2/5B1p/1p2pQ2/2q4P/8/B3pK2/8/8 w - - 0 1)

Lider, Valentin Viktorovich

Northwest Chess, 1973

1rN2k2/5B1p/1p2pQ2/2q4P/8/B3pK2/8/8

#2

6 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qb4
      • 2.Bxb4#
    • 1...Qd6
      • 2.Bxd6#
    • 1...Qe7
      • 2.Bxe7#
    • 1...b5
      • 2.Bxc5#
  • Keys
    • 1.Se7!
      • threat
        • 2.Bg6#
      • 1...Qd5+
        • 2.Sxd5#
      • 1...Qf5+
        • 2.Sxf5#
      • 1...Qxh5+
        • 2.Bxh5#
      • 1...Qc6+
        • 2.Sxc6#
      • 1...Qxe7
        • 2.Bxe7#
      • 1...Qd4
        • 2.Sg6#
      • 1...Qc3
        • 2.Sg6#
      • 1...Qe5
        • 2.Sg6#
      • 1...Qg5
        • 2.Sd5#
        • 2.Sf5#
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • Q(b);OGATEB::B(A),XQ(b)
    • Q(b);OGATE::B(A),XQ(b)
    • P(c);N_GUARD::B(A),XQ(b)
  • Actual
    • S(F);N_PINQ(b)
    • Threat
      • QAR(D)+B(E)
    • Vars
      • Q(b);CHECK::B(A)+S(F),XQ(b)
      • Q(b);CHECK,OGATE,XP(C)::QAR(D)+B(E),XQ(b)
      • Q(b);OGATE,P_SPINQ(b),XS(F)::B(A),XQ(b)
      • Q(b);::B(A)+S(F),DCHECK
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