MESON Chess Problem Database

Problem Display
PID: 93726 (7K/1Q6/3p1p2/1N1P3N/3PkPp1/4p3/b1n1P1n1/8 w - - 0 1)

Bosak, Juraj

Sachove umeni (Ceskoslovensky sach), 1953

7K/1Q6/3p1p2/1N1P3N/3PkPp1/4p3/b1n1P1n1/8

#2

8 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Qh7#
    • 1...Sxd4
      • 2.Sxd6#
    • 1...Sxf4
      • 2.Sg3#
  • Tries
    • 1.Sc3+?
      • 1...Kf5
        • 2.Qh7#
      • 1...Kxd4!
    • 1.Qe7+?
      • 1...Kf5
        • 2.Qh7#
      • 1...Kxd5!
    • 1.Qf7?
      • threat
        • 2.Qe6#
      • 1...Kf5
        • 2.Sxd6#
        • 2.Qh7#
      • 1...Sxd4
        • 2.Sxd6#
      • 1...Sxf4
        • 2.Sg3#
      • 1...Bxd5!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Qe6#
      • 1...Kxd5
        • 2.Sxf6#
      • 1...Bxd5
        • 2.Qxc2#
      • 1...Sxd4
        • 2.Sc3#
      • 1...Sxf4
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(e);S_FLIGHT::QAB(G)
    • S(b);SBLOCK,XP(B)::S(D),XP(g)
    • S(c);SBLOCK,XP(C)::S(F)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(e);S_FLIGHT::QAB(G)
      • Refutation
        • K(e);P-FLIGHT,XP(B)
    • Try
      • Q(G);CHECK
      • Vars
        • K(e);S_FLIGHT::QAB(G)
      • Refutation
        • K(e);S_FLIGHT,XP(E)
    • Try
      • Q(G);
      • Threat
        • QAR2(G)
      • Vars
        • S(b);SBLOCK,XP(B)::S(D),XP(g)
        • S(c);SBLOCK,XP(C)::S(F)
      • Refutation
        • B(a);XP(E)
  • Actual
    • Q(G);
    • Threat
      • QAR2(G)
    • Vars
      • K(e);S_FLIGHT,XP(E)::S(F),XP(h)
      • B(a);SBLOCK,XP(E)::QAB(G),XS(b)
      • S(b);SBLOCK,XP(B)::S(D)
      • S(c);SBLOCK,XP(C)::S(F),XP(h)
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