MESON Chess Problem Database

Problem Display
PID: 121337 (8/1Q6/4p3/5kBb/r1N3R1/p6p/4Nn2/K6n w - - 0 1)

Sobek, Karel

Hana, 1947

8/1Q6/4p3/5kBb/r1N3R1/p6p/4Nn2/K6n

#2

6 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bg6
      • 2.Qf3#
    • 1...Sd1
      • 2.Qe4#
    • 1...Sd3
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
  • Tries
    • 1.Sd4+?
      • 1...Kg6
        • 2.Se5#
      • 1...Kxg4!
    • 1.Se3+?
      • 1...Ke5
        • 2.Qc7#
        • 2.Qb8#
      • 1...Kg6!
    • 1.Be7?
      • threat
        • 2.Rg5#
        • 2.Qf3#
      • 1...Kxg4
        • 2.Se3#
      • 1...Rxc4
        • 2.Rg5#
      • 1...Sxg4
        • 2.Qb1#
      • 1...e5
        • 2.Qc8#
        • 2.Qd7#
      • 1...Sd3
        • 2.Rg5#
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...Bxg4!
    • 1.Qf7+?
      • 1...Kxg4
        • 2.Qf4#
      • 1...Bxf7!
  • Keys
    • 1.Bd8!
      • threat
        • 2.Rg5#
        • 2.Qf3#
      • 1...Kxg4
        • 2.Se3#
      • 1...Rxc4
        • 2.Rg5#
      • 1...Bxg4
        • 2.Qh7#
      • 1...Sxg4
        • 2.Qb1#
      • 1...e5
        • 2.Qc8#
        • 2.Qd7#
      • 1...Sd3
        • 2.Rg5#
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • B(g);SBLOCK::QAR2(F)
    • S(b);N_GUARD::QAB1(F)
    • S(b);N_GUARD::QAB1(F),XS(b)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(f);S_FLIGHT::S(C)
      • Refutation
        • K(f);S_FLIGHT,XR(D)
    • Try
      • S(C);CHECK
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • B(E);
      • Threat
        • DUALS(2)
      • Vars
        • K(f);S_FLIGHT,XR(D)::S(C)
        • R(e);XS(C)::R1(D)
        • S(b);N_GUARD,SBLOCK,XR(D)::QAB(F)
        • S(b);N_GUARD::QAB1(F),XS(b)
      • Refutation
        • B(g);XR(D)
    • Try
      • Q(F);CHECK
      • Vars
        • K(f);OGATE,S_FLIGHT,XR(D)::QAR1(F)
      • Refutation
        • B(g);XQ(F)
  • Actual
    • B(E);
    • Threat
      • DUALS(2)
    • Vars
      • K(f);S_FLIGHT,XR(D)::S(C)
      • R(e);XS(C)::R1(D)
      • B(g);N_GUARD,SBLOCK,XR(D)::QAB(F)
      • S(b);N_GUARD,SBLOCK,XR(D)::QAB(F)
      • S(b);N_GUARD::QAB1(F),XS(b)
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