MESON Chess Problem Database

Problem Display
PID: 261352 (1Q6/2Pb3p/np1N4/p1PpP3/p2kpB2/5n2/3PPp1r/K1R5 w - - 0 1)

Petkov, Petko Andonov

Neue Zurcher Zeitung, 1989

1Q6/2Pb3p/np1N4/p1PpP3/p2kpB2/5n2/3PPp1r/K1R5

#2

10 + 12

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bh3
      • 2.Sb5#
    • 1...Bg4
      • 2.Sb5#
    • 1...Bb5
      • 2.Sxb5#
      • 2.Sf5#
    • 1...Bf5
      • 2.Sb5#
      • 2.Sxf5#
    • 1...Bc6
      • 2.Sf5#
    • 1...Be6
      • 2.Sb5#
    • 1...Bc8
      • 2.Sb5#
    • 1...Be8
      • 2.Sf5#
    • 1...Sxe5
      • 2.Be3#
    • 1...e3
      • 2.dxe3#
    • 1...bxc5
      • 2.Qb2#
  • Tries
    • 1.Qxb6?
      • threat
        • 2.Qb2#
      • 1...Bb5
        • 2.Sxb5#
        • 2.Sf5#
      • 1...Sb4
        • 2.c6#
      • 1...a3!
    • 1.Qh8?
      • threat
        • 2.Be3#
      • 1...Sxd2
        • 2.e6#
      • 1...e3
        • 2.Bxe3#
        • 2.dxe3#
      • 1...f1S!
    • 1.e6?
      • threat
        • 2.Sf5#
      • 1...Bxe6
        • 2.Sb5#
      • 1...Sh4
        • 2.Qh8#
      • 1...e3
        • 2.dxe3#
      • 1...Rh5!
  • Keys
    • 1.c6!
      • threat
        • 2.Sb5#
      • 1...Bxc6
        • 2.Sf5#
      • 1...Sxc7
        • 2.Qxb6#
      • 1...e3
        • 2.dxe3#
      • 1...b5
        • 2.Sxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • B(k);N_GUARD::S(H)
    • S(c);SBLOCK,XP(G)::B(E)
    • P(f);OGATE::P(C),XP(f)
    • P(j);OGATE,XP(F)::QAB(J)
  • Tries
    • Try
      • Q(J);XP(j)
      • Threat
        • QAB(J)
      • Vars
        • S(i);N_GUARD::QAB(J)+P(F)
      • Refutation
        • P(d);
    • Try
      • Q(J);
      • Threat
        • B(E)
      • Vars
        • S(c);N_GUARD,XP(C)::QAB(J)+P(G)
      • Refutation
        • P(a);
    • Try
      • P(G);
      • Threat
        • S(H)
      • Vars
        • B(k);N_GUARD,XP(G)::S(H)
        • S(c);N_GUARD::QAB(J)
        • P(f);OGATE::P(C),XP(f)
      • Refutation
        • R(b);
  • Actual
    • P(F);
    • Threat
      • S(H)
    • Vars
      • B(k);N_GUARD,XP(F)::S(H)
      • S(i);N_GUARD,XP(I)::QAB(J),XP(j)
      • P(f);OGATE::P(C),XP(f)
      • P(j);::S(H),XP(j)
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