MESON Chess Problem Database

Problem Display
PID: 165195 (3B4/1pnr2N1/5Rp1/2kP4/PNp1p1KQ/2P5/5P2/8 w - - 0 1)

Petrov, Evgeny Aleksandrovich

Novi Temi, 1982

3B4/1pnr2N1/5Rp1/2kP4/PNp1p1KQ/2P5/5P2/8

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Re7
      • 2.Bxe7#
    • 1...Sb5
      • 2.Bb6#
    • 1...Sa6
      • 2.Bb6#
    • 1...Se8
      • 2.Bb6#
    • 1...b5
      • 2.Rc6#
    • 1...b6
      • 2.Rc6#
  • Tries
    • 1.Qg5?
      • threat
        • 2.Qe3#
      • 1...Rxd5
        • 2.Be7#
      • 1...Sxd5
        • 2.Bb6#
      • 1...Sb5
        • 2.Bb6#
        • 2.d6#
      • 1...e3
        • 2.Qxe3#
      • 1...Se6!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qe3#
      • 1...Rxd5
        • 2.Qxc7#
      • 1...Sxd5
        • 2.Se6#
      • 1...Sb5
        • 2.Se6#
        • 2.Bb6#
      • 1...Se6
        • 2.Sxe6#
      • 1...e3
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • R(g);N_GUARD::B(J),XR(g)
    • S(f);OGATE::B(J)
    • P(e);N_GUARD::R1(H)
  • Tries
    • Try
      • Q(F);
      • Threat
        • QAB(F)
      • Vars
        • R(g);N_GUARD,P_SPINR(g),XP(G)::B(J)
        • S(f);OGATE,P_SPINS(f),XP(G)::B(J)
        • P(b);::QAB(F),XP(b)
      • Refutation
        • S(f);
  • Actual
    • Q(F);
    • Threat
      • QAB(F)
    • Vars
      • R(g);N_GUARD,XP(G)::QAR2(F),XS(f)
      • S(f);N_GUARD,XP(G)::S(I)
      • S(f);N_GUARD::S(I),XS(f)
      • P(b);::QAB(F),XP(b)
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