MESON Chess Problem Database

Problem Display
PID: 249798 (4b3/4K3/3N1Np1/4kP2/8/p1P3P1/2nPBPn1/8 w - - 0 1)

Ulanov, Leonid

Schweizerische Schachzeitung, 1996

4b3/4K3/3N1Np1/4kP2/8/p1P3P1/2nPBPn1/8

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.d4#
    • 1...Sce1
      • 2.d4#
    • 1...Sce3
      • 2.d4#
    • 1...Sb4
      • 2.d4#
    • 1...Sge1
      • 2.f4#
    • 1...Sge3
      • 2.f4#
    • 1...Sh4
      • 2.f4#
    • 1...gxf5
      • 2.Sc4#
  • Tries
    • 1.Sf7+?
      • 1...Kxf5
        • 2.Bd3#
        • 2.Bg4#
      • 1...Bxf7!
    • 1.Sd7+?
      • 1...Kd5
        • 2.Bf3#
      • 1...Bxd7!
    • 1.Bd3?
      • threat
        • 2.Sc4#
      • 1...Bb5
        • 2.Sf7#
      • 1...Bf7
        • 2.Sxf7#
      • 1...Sge3
        • 2.f4#
      • 1...Sce3!
    • 1.Bf3?
      • threat
        • 2.Sg4#
      • 1...gxf5
        • 2.Sc4#
      • 1...Sce3
        • 2.d4#
      • 1...Sge3!
    • 1.Bc4?
      • threat
        • 2.Sg4#
      • 1...Sce3
        • 2.d4#
      • 1...Sge3
        • 2.f4#
      • 1...gxf5!
  • Keys
    • 1.Bg4!
      • threat
        • 2.Sc4#
      • 1...Bb5
        • 2.Sf7#
      • 1...Bf7
        • 2.Sxf7#
      • 1...Sce3
        • 2.d4#
      • 1...Sge3
        • 2.f4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • S(a);N_GUARD::P(A)
    • S(b);N_GUARD::P(C)
    • P(e);SBLOCK,XP(F)::S(G)
  • Tries
    • Try
      • S(G);CHECK
      • Refutation
        • B(f);XS(G)
    • Try
      • S(H);CHECK
      • Vars
        • K(d);P-FLIGHT,S_CUTB(f)::B(B)
      • Refutation
        • B(f);XS(H)
    • Try
      • B(B);
      • Threat
        • S(G)
      • Vars
        • B(f);N_GUARD::S(G)
        • B(f);N_GUARD::S(G),XB(f)
        • S(b);N_GUARD::P(C)
      • Refutation
        • S(a);
    • Try
      • B(B);
      • Threat
        • S(H)
      • Vars
        • P(e);SBLOCK,XP(F)::S(G)
        • S(a);N_GUARD::P(A)
      • Refutation
        • S(b);
    • Try
      • B(B);
      • Threat
        • S(H)
      • Vars
        • S(a);N_GUARD::P(A)
        • S(b);N_GUARD::P(C)
      • Refutation
        • P(e);XP(F)
  • Actual
    • B(B);
    • Threat
      • S(G)
    • Vars
      • B(f);N_GUARD::S(G)
      • B(f);N_GUARD::S(G),XB(f)
      • S(a);N_GUARD::P(A)
      • S(b);N_GUARD::P(C)
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