MESON Chess Problem Database

Problem Display
PID: 226893 (n7/3P4/2K1NP2/4PN2/pQpPk1P1/qp5r/4P2b/8 w - - 0 1)

Kopaev, Viacheslav Georgievich

The Problemist, 1987

n7/3P4/2K1NP2/4PN2/pQpPk1P1/qp5r/4P2b/8

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.Sd6#
    • 1...Bf4
      • 2.Sc5#
  • Tries
    • 1.Qb7?
      • threat
        • 2.Kb5#
      • 1...Qc5+
        • 2.Kxc5#
      • 1...Qd6+
        • 2.Kxd6#
      • 1...Sb6
        • 2.Kxb6#
      • 1...Sc7
        • 2.Kxc7#
      • 1...Qb4!
  • Keys
    • 1.Qd2!
      • threat
        • 2.Sg5#
      • 1...Qc5+
        • 2.Sxc5#
      • 1...Qd6+
        • 2.Sxd6#
      • 1...Re3
        • 2.Qxe3#
      • 1...Rh5
        • 2.Qe3#
      • 1...Bf4
        • 2.Qxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(d);SBLOCK::S(F)
    • B(a);SBLOCK::S(H)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAB(B)+K(G)
      • Vars
        • Q(b);CHECK::QAB(B)+K(G),XQ(b)
        • S(h);::QAB(B)+K(G),XS(h)
      • Refutation
        • Q(b);
  • Actual
    • Q(B);
    • Threat
      • S(H)
    • Vars
      • Q(b);CHECK,N_GUARD::S(H),XQ(b)
      • Q(b);CHECK,N_GUARD::S(F),XQ(b)
      • R(d);N_GUARD::QAR1(B),XR(d)
      • R(d);N_GUARD::QAR1(B)
      • B(a);N_GUARD::QAR1(B),XB(a)
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