MESON Chess Problem Database

Problem Display
PID: 206302 (3B4/p3Q3/1r6/p2N4/k7/1p6/1K2n3/8 w - - 0 1)

Koops, Karl

Funkschach, 1925

3B4/p3Q3/1r6/p2N4/k7/1p6/1K2n3/8

#2

4 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rb5
      • 2.Qa3#
    • 1...Sc1
      • 2.Sc3#
    • 1...Sg1
      • 2.Sc3#
    • 1...Sc3
      • 2.Sxc3#
    • 1...Sg3
      • 2.Sc3#
    • 1...Sd4
      • 2.Sc3#
    • 1...Sf4
      • 2.Sc3#
  • Tries
    • 1.Qd7+?
      • 1...Rc6
        • 2.Qxc6#
      • 1...Rb5!
    • 1.Qe8+?
      • 1...Rc6
        • 2.Qxc6#
      • 1...Rb5!
  • Keys
    • 1.Qc5!
      • 1...Rb4
        • 2.Qxa5#
      • 1...Rb5
        • 2.Qa3#
      • 1...Ra6
        • 2.Qc4#
      • 1...Rc6
        • 2.Qxa5#
        • 2.Qxc6#
      • 1...Rd6
        • 2.Qc4#
        • 2.Qxa5#
      • 1...Re6
        • 2.Qc4#
        • 2.Qxa5#
      • 1...Rf6
        • 2.Qc4#
        • 2.Qxa5#
      • 1...Rg6
        • 2.Qc4#
        • 2.Qxa5#
      • 1...Rh6
        • 2.Qc4#
        • 2.Qxa5#
      • 1...Rb7
        • 2.Qxa5#
      • 1...Rb8
        • 2.Qxa5#
      • 1...Sc1
        • 2.Sc3#
      • 1...Sg1
        • 2.Sc3#
      • 1...Sc3
        • 2.Sxc3#
      • 1...Sg3
        • 2.Sc3#
      • 1...Sd4
        • 2.Sc3#
      • 1...Sf4
        • 2.Sc3#
      • 1...a6
        • 2.Sxb6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(e);SBLOCK::QAR1(C)
    • S(a);N_GUARD::S(B)
    • S(a);N_GUARD::S(B),XS(a)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • R(e);N_GUARD,P_SPINR(e)::QAB(C),XR(e)
      • Refutation
        • R(e);P_SPINR(e)
    • Try
      • Q(C);CHECK
      • Vars
        • R(e);N_GUARD,P_SPINR(e)::QAB(C),XR(e)
      • Refutation
        • R(e);P_SPINR(e)
  • Actual
    • Q(C);
    • Vars
      • R(e);::QAR1(C),XP(d)
      • R(e);SBLOCK::QAR1(C)
      • R(e);N_GUARD::QAR2(C)
      • S(a);N_GUARD::S(B)
      • S(a);N_GUARD::S(B),XS(a)
      • P(f);N_GUARD::S(B),XR(e)
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