MESON Chess Problem Database

Problem Display
PID: 108463 (8/6B1/1p6/2N5/1kN5/3Q4/8/3B3K w - - 0 1)

Idunk, Dr Bohumil

Czech Federation, 1959

8/6B1/1p6/2N5/1kN5/3Q4/8/3B3K

#2

6 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...bxc5
      • 2.Qb3#
    • 1...b5
      • 2.Sa6#
  • Tries
    • 1.Sa3?
      • threat
        • 2.Qc3#
      • 1...Ka5
        • 2.Bc3#
        • 2.Qb5#
        • 2.Qd2#
        • 2.Qc3#
      • 1...Kxc5!
    • 1.Se5?
      • 1...Ka5
        • 2.Sc6#
      • 1...Kxc5
        • 2.Bf8#
      • 1...bxc5
        • 2.Sc6#
      • 1...b5!
    • 1.Sd6?
      • threat
        • 2.Qc3#
      • 1...Ka5
        • 2.Bc3#
        • 2.Qb5#
        • 2.Qd2#
        • 2.Qa3#
        • 2.Qc3#
      • 1...Kxc5!
    • 1.Ba4?
      • 1...Kxc5
        • 2.Bf8#
      • 1...bxc5
        • 2.Qb3#
      • 1...b5!
  • Keys
    • 1.Sa5!
      • 1...Kxa5
        • 2.Bc3#
      • 1...Kxc5
        • 2.Bf8#
      • 1...bxa5
        • 2.Sa6#
      • 1...bxc5
        • 2.Sc6#
      • 1...b5
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK,XS(E)::QAR1(C)
    • P(b);SBLOCK::S(E)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAB1(C)
      • Refutation
        • K(a);S_FLIGHT,XS(E)
    • Try
      • S(D);
      • Vars
        • K(a);S_FLIGHT::S(D)
        • K(a);OGATEB,S_FLIGHT,XS(E)::B(F)
        • P(b);SBLOCK,XS(E)::S(D)
      • Refutation
        • P(b);
    • Try
      • S(D);
      • Threat
        • QAB1(C)
      • Refutation
        • K(a);S_FLIGHT,XS(E)
    • Try
      • B(A);
      • Vars
        • K(a);OGATEB,S_FLIGHT,XS(E)::B(F)
        • P(b);SBLOCK,XS(E)::QAR1(C)
      • Refutation
        • P(b);
  • Actual
    • S(D);
    • Vars
      • K(a);S_FLIGHT,XS(D)::B(F)
      • K(a);OGATEB,S_FLIGHT,XS(E)::B(F)
      • P(b);SBLOCK,XS(D)::S(E)
      • P(b);SBLOCK,XS(E)::S(D)
      • P(b);SBLOCK::QAB1(C)
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