MESON Chess Problem Database

Problem Display
PID: 210255 (8/1B6/p7/1r6/k1P5/pN6/N1P5/QK6 w - - 0 1)

Ernst, Erich

Badische Neueste Nachrichten, 1989

8/1B6/p7/1r6/k1P5/pN6/N1P5/QK6

#2

7 + 4

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4
      • 2.Sc3#
  • Tries
    • 1.Qc3?
      • 1...Rxb3+
        • 2.cxb3#
      • 1...Rxb7
        • 2.Qa5#
      • 1...Ra5
        • 2.Qb4#
        • 2.Qxa5#
      • 1...Rb4
        • 2.Qxb4#
      • 1...Rc5
        • 2.Sxc5#
        • 2.Qb4#
      • 1...Rd5
        • 2.Qb4#
      • 1...Re5
        • 2.Qb4#
      • 1...Rf5
        • 2.Qb4#
      • 1...Rg5
        • 2.Qb4#
      • 1...Rh5
        • 2.Qb4#
      • 1...Rb6
        • 2.Qa5#
      • 1...a5!
  • Keys
    • 1.Bc6!
      • 1...a5
        • 2.Bxb5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(c);SBLOCK::S(C)
  • Tries
    • Try
      • Q(A);
      • Vars
        • R(c);CHECK,OGATE,XS(E)::P(D),XR(c)
        • R(c);N_GUARD,XB(G)::QAR1(A)
        • R(c);N_GUARD::QAR1(A),XR(c)
        • R(c);N_GUARD,N_PINS(E)::QAR1(A)
        • R(c);N_GUARD::QAR1(A)
      • Refutation
        • P(d);
  • Actual
    • B(G);P_PINR(c)
    • Vars
      • P(d);N_GUARD::B(G),XR(c)
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