MESON Chess Problem Database

Problem Display
PID: 240024 (8/4RK2/3p3p/3BBk1p/r1p3pP/6n1/3P1pNb/1bQn1q1r w - - 0 1)

Schneider, Michael

Die Schwalbe, 1971

8/4RK2/3p3p/3BBk1p/r1p3pP/6n1/3P1pNb/1bQn1q1r

#2

8 + 14

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Se3#
    • 1...Sc3
      • 2.Se3#
    • 1...Se3
      • 2.Sxe3#
    • 1...Se2
      • 2.Qxb1#
  • Tries
    • 1.Qxb1+?
      • 1...Se4
        • 2.Bxe4#
        • 2.Qxe4#
      • 1...Qd3!
    • 1.d3?
      • threat
        • 2.Qf4#
      • 1...cxd3
        • 2.Qc8#
      • 1...dxe5
        • 2.Be6#
      • 1...Se3
        • 2.Sxe3#
      • 1...Se2
        • 2.Be4#
      • 1...Se4
        • 2.Bxe4#
      • 1...c3!
  • Keys
    • 1.d4!
      • threat
        • 2.Qf4#
      • 1...dxe5
        • 2.Rxe5#
      • 1...cxd4 ep
        • 2.Qc8#
      • 1...Se3
        • 2.Sxe3#
      • 1...Se2
        • 2.Qxb1#
      • 1...Se4
        • 2.Be6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(b);N_GUARD::S(C)
    • S(b);N_GUARD::S(C),XS(b)
    • S(g);N_GUARD,S_CUTQ(c)::QAB(A),XB(a)
  • Tries
    • Try
      • Q(A);CHECK,XB(a)
      • Refutation
        • Q(c);P_SPINQ(c)
    • Try
      • P(B);
      • Threat
        • QAR1(A)
      • Vars
        • P(i);OGATE,XP(B)::QAB(A)
        • P(m);SBLOCK,XB(F)::B(E)
        • S(b);N_GUARD::S(C),XS(b)
        • S(g);N_GUARD::B(E)
        • S(g);N_GUARD::B(E),XS(g)
      • Refutation
        • P(i);
  • Actual
    • P(B);
    • Threat
      • QAR1(A)
    • Vars
      • P(m);OGATE,XB(F)::R1(G),XP(m)
      • P(i);EP,OGATE,XP(B)::QAB(A)
      • S(b);N_GUARD::S(C),XS(b)
      • S(g);N_GUARD,S_CUTQ(c)::QAB(A),XB(a)
      • S(g);SBLOCK::B(E)
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