MESON Chess Problem Database

Problem Display
PID: 143304 (3K4/nPRQRPn1/1p3p2/1pNbNp2/1ppkpp2/3P4/2PBP3/8 w - - 0 1)

Sahlberg, Robert

Brentano's Chess Monthly, 1881

3K4/nPRQRPn1/1p3p2/1pNbNp2/1ppkpp2/3P4/2PBP3/8

#2

12 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...b3
      • 2.c3#
    • 1...cxd3
      • 2.Sb3#
    • 1...c3
      • 2.Sb3#
    • 1...exd3
      • 2.Sf3#
    • 1...e3
      • 2.Sf3#
    • 1...f3
      • 2.e3#
  • Tries
    • 1.Se6+?
      • 1...Kxe5
        • 2.Bxf4#
        • 2.d4#
      • 1...Sxe6+!
    • 1.Sc6+?
      • 1...Kxc5
        • 2.Bxb4#
        • 2.d4#
      • 1...Sxc6+!
  • Keys
    • 1.Qd6!
      • 1...Sc6+
        • 2.Sxc6#
      • 1...Se6+
        • 2.Sxe6#
      • 1...cxd3
        • 2.Sb3#
      • 1...exd3
        • 2.Sf3#
      • 1...bxc5
        • 2.Qxc5#
      • 1...fxe5
        • 2.Qxe5#
      • 1...Sc8
        • 2.Sc6#
      • 1...Sh5
        • 2.Se6#
      • 1...Se8
        • 2.Se6#
      • 1...b3
        • 2.c3#
      • 1...c3
        • 2.Sb3#
      • 1...e3
        • 2.Sf3#
      • 1...f3
        • 2.e3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • P(a);N_GUARD::P(A)
    • P(b);N_GUARD,XP(D)::S(E)
    • P(b);N_GUARD::S(E)
    • P(d);N_GUARD,XP(D)::S(F)
    • P(d);N_GUARD::S(F)
    • P(e);N_GUARD::P(C)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • S(l);CHECK,XS(E)
    • Try
      • S(F);CHECK
      • Refutation
        • S(k);CHECK,XS(F)
  • Actual
    • Q(I);
    • Vars
      • S(k);CHECK,N_GUARD::S(F),XS(k)
      • S(l);CHECK,N_GUARD::S(E),XS(l)
      • P(b);N_GUARD,XP(D)::S(E)
      • P(d);N_GUARD,XP(D)::S(F)
      • P(i);OGATE,XS(E)::QAB1(I),XP(i)
      • P(j);OGATE,XS(F)::QAB1(I),XP(j)
      • S(k);N_GUARD::S(F)
      • S(l);N_GUARD::S(E)
      • P(a);N_GUARD::P(A)
      • P(b);N_GUARD::S(E)
      • P(d);N_GUARD::S(F)
      • P(e);N_GUARD::P(C)
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