MESON Chess Problem Database

Problem Display
PID: 15916 (1n1B4/qbR1Np1N/3pk1Pp/3prp1P/p2npp2/8/8/3K1B2 w - - 0 1)

Petkov, Petko Andonov

4th HM., Neue Zurcher Zeitung, 1989

1n1B4/qbR1Np1N/3pk1Pp/3prp1P/p2npp2/8/8/3K1B2

#2

8 + 14

3840 Petkov Selected Compositions 2000

SOLUTION

  • SOUND
  • Sets
    • 1...f6
      • 2.Sf8#
  • Tries
    • 1.Sxd5?
      • threat
        • 2.Sxf4#
      • 1...Kxd5
        • 2.Bc4#
      • 1...Rxd5
        • 2.Re7#
      • 1...Bxd5
        • 2.Sf8#
      • 1...f3
        • 2.Sf4#
      • 1...Se2!
    • 1.Sc6?
      • threat
        • 2.Sf8#
        • 2.Re7#
      • 1...Bxc6
        • 2.Sf8#
      • 1...Sdxc6
        • 2.Sf8#
      • 1...Sbxc6
        • 2.Sf8#
      • 1...Ba6
        • 2.Sf8#
      • 1...Ba8
        • 2.Sf8#
      • 1...Bc8
        • 2.Sf8#
      • 1...Sd7!
    • 1.Sc8?
      • threat
        • 2.Sf8#
        • 2.Re7#
      • 1...Bxc8
        • 2.Sf8#
      • 1...Ba6
        • 2.Sf8#
      • 1...Bc6
        • 2.Sf8#
      • 1...Ba8
        • 2.Sf8#
      • 1...Sdc6
        • 2.Sf8#
      • 1...Sbc6
        • 2.Sf8#
      • 1...Sd7!
    • 1.Sg8?
      • threat
        • 2.Sf8#
        • 2.Re7#
      • 1...Ba6
        • 2.Sf8#
      • 1...Bc6
        • 2.Sf8#
      • 1...Ba8
        • 2.Sf8#
      • 1...Bc8
        • 2.Sf8#
      • 1...Sdc6
        • 2.Sf8#
      • 1...Sbc6
        • 2.Sf8#
      • 1...Sd7!
  • Keys
    • 1.Sxf5!
      • threat
        • 2.Sg7#
      • 1...Kxf5
        • 2.Bh3#
      • 1...Rxf5
        • 2.Re7#
      • 1...Sxf5
        • 2.Sf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(m);SBLOCK::S(G)
  • Tries
    • Try
      • S(F);XP(e)
      • Threat
        • S(F),XP(d)
      • Vars
        • K(i);OGATEB,S_FLIGHT,XS(F)::B(B)
        • R(f);SBLOCK,XS(F)::R1(E)
        • B(l);SBLOCK,XS(F)::S(G)
        • P(d);::S(F)
      • Refutation
        • S(b);
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • B(l);XS(F)::S(G)
        • S(b);XS(F)::S(G)
        • S(n);XS(F)::S(G)
        • B(l);::S(G)
      • Refutation
        • S(n);
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • B(l);XS(F)::S(G)
        • B(l);::S(G)
        • S(b);::S(G)
        • S(n);::S(G)
      • Refutation
        • S(n);
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • B(l);::S(G)
        • S(b);::S(G)
        • S(n);::S(G)
      • Refutation
        • S(n);
  • Actual
    • S(F);XP(g)
    • Threat
      • S(F)
    • Vars
      • K(i);OGATEB,S_FLIGHT,XS(F)::B(B)
      • R(f);SBLOCK,XS(F)::R1(E)
      • S(b);SBLOCK,XS(F)::S(G)
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