MESON Chess Problem Database

Problem Display
PID: 108009 (N3B3/r2n1p2/3PkP1K/3pPpP1/8/2QN4/4n3/8 w - - 0 1)

Ducak, Jan

Sachove umeni (Ceskoslovensky sach), 1984

N3B3/r2n1p2/3PkP1K/3pPpP1/8/2QN4/4n3/8

#2

9 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Sc7#
    • 1...Ra2
      • 2.Sc7#
    • 1...Ra3
      • 2.Sc7#
    • 1...Ra4
      • 2.Sc7#
    • 1...Ra5
      • 2.Sc7#
    • 1...Ra6
      • 2.Sc7#
    • 1...Rc7
      • 2.Sxc7#
    • 1...Sc1
      • 2.Sf4#
    • 1...Sg1
      • 2.Sf4#
    • 1...Sg3
      • 2.Sf4#
    • 1...Sf4
      • 2.Sxf4#
    • 1...Sc5
      • 2.Sxc5#
    • 1...Sxe5
      • 2.Qxe5#
    • 1...Sb6
      • 2.Sc5#
    • 1...Sxf6
      • 2.Sc5#
    • 1...Sb8
      • 2.Sc5#
    • 1...Sf8
      • 2.Sc5#
    • 1...d4
      • 2.Qb3#
      • 2.Qc4#
  • Tries
    • 1.Kg7?
      • threat
        • 2.Bxf7#
      • 1...Sxe5
        • 2.Qxe5#
      • 1...Sxf6
        • 2.Sc5#
      • 1...Sc5
        • 2.Sxc5#
      • 1...Sb6
        • 2.Sc5#
      • 1...Sb8
        • 2.Sc5#
      • 1...Sf8
        • 2.Sc5#
      • 1...f4!
    • 1.Bxd7+?
      • 1...Rxd7
        • 2.Sc5#
      • 1...Kxd7!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Bxd7#
      • 1...Rxc7
        • 2.Sxc7#
      • 1...Sxe5
        • 2.Sc5#
      • 1...Sxf6
        • 2.Bxf7#
      • 1...d4
        • 2.Qc4#
      • 1...Sc5
        • 2.Bxf7#
      • 1...Sb6
        • 2.Bxf7#
      • 1...Sb8
        • 2.Bxf7#
      • 1...Sf8
        • 2.Bxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 6
    • ADDED MATES = 1
    • REMOVED MATES = 10
  • Sets
    • R(e);N_GUARD::S(H)
    • R(e);N_GUARD::S(H),XR(e)
    • S(a);N_GUARD::S(B)
    • S(a);N_GUARD::S(B),XS(a)
    • S(f);N_GUARD::S(B),XS(f)
    • S(f);OGATE,XP(C)::QAR1(A),XS(f)
    • S(f);N_GUARD::S(B)
    • S(f);N_GUARD,XP(F)::S(B)
  • Tries
    • Try
      • K(G);S_FLIGHT
      • Threat
        • B(I),XP(g)
      • Vars
        • S(f);OGATE,XP(C)::QAR1(A),XS(f)
        • S(f);N_GUARD,XP(F)::S(B)
        • S(f);N_GUARD::S(B),XS(f)
        • S(f);N_GUARD::S(B)
      • Refutation
        • P(c);
    • Try
      • B(I);CHECK,XS(f)
      • Vars
        • R(e);XB(I)::S(B)
      • Refutation
        • K(d);S_FLIGHT,XB(I)
  • Actual
    • Q(A);
    • Threat
      • B(I),XS(f)
    • Vars
      • R(e);XQ(A)::S(H),XR(e)
      • S(f);N_GUARD,SBLOCK,XP(C)::S(B)
      • S(f);XP(F)::B(I),XP(g)
      • P(b);OGATEB::QAB(A)
      • S(f);::B(I),XP(g)
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