MESON Chess Problem Database

Problem Display
PID: 241497 (n3N3/b1p2K2/8/4k3/2P1ppP1/2P5/1Q3N2/7b w - - 0 1)

Pilchenko, Viacheslav Karlovich

Shavirin, Valery Mikhailovich

Sachove umeni (Ceskoslovensky sach), 1979

n3N3/b1p2K2/8/4k3/2P1ppP1/2P5/1Q3N2/7b

#2

7 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bd4
      • 2.cxd4#
  • Tries
    • 1.Qd2?
      • threat
        • 2.Qd5#
      • 1...Bd4
        • 2.Qxd4#
        • 2.cxd4#
      • 1...Sb6
        • 2.Qd4#
      • 1...f3
        • 2.Qg5#
      • 1...c6
        • 2.Qd6#
      • 1...e3!
    • 1.Qb5+?
      • 1...Bc5
        • 2.Qxc5#
      • 1...c5!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qd5#
      • 1...f3
        • 2.Qxe4#
      • 1...Sb6
        • 2.Qxc7#
      • 1...e3
        • 2.Sd3#
      • 1...c6
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(e);OGATE::P(C),XB(e)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(g);S_CUTB(e)::QAB1(A)
        • P(c);OGATE::QAR2(A)
        • P(f);N_GUARD::QAB1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);CHECK
      • Vars
        • B(e);N_GUARD,P_SPINB(e)::QAR2(A),XB(e)
      • Refutation
        • P(f);P_SPINP(f)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • P(c);S_CUTB(a)::QAR1(A),XP(b)
      • S(g);N_GUARD::QAB(A),XP(f)
      • P(b);N_GUARD::S(B)
      • P(f);OGATE::QAR2(A)
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