MESON Chess Problem Database

Problem Display
PID: 11386 (bb6/r7/q5p1/1n1p4/1P1k2N1/1P1BR3/3P2K1/5Q2 w - - 0 1)

Binder, Friedrich

Deutsche Schachblatter, 1938

bb6/r7/q5p1/1n1p4/1P1k2N1/1P1BR3/3P2K1/5Q2

#2

8 + 8

5454 Near Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rc7
      • 2.Qf4#
    • 1...Bf4
      • 2.Qxf4#
    • 1...Sa3
      • 2.Qa1#
    • 1...Sd6
      • 2.Qf6#
    • 1...Sc7
      • 2.Qf4#
  • Tries
    • 1.Bb1?
      • threat
        • 2.Qd3#
      • 1...Sc3
        • 2.dxc3#
      • 1...Sd6
        • 2.Qf6#
      • 1...Sc7
        • 2.Qf4#
      • 1...Sa3!
    • 1.Be4?
      • threat
        • 2.Qd3#
      • 1...dxe4
        • 2.Qc4#
      • 1...Sa3
        • 2.Qa1#
      • 1...Sc3
        • 2.dxc3#
      • 1...Sd6
        • 2.Qf6#
      • 1...Sc7!
    • 1.Bf5?
      • threat
        • 2.Rd3#
        • 2.Qd3#
      • 1...gxf5
        • 2.Qd3#
      • 1...Sa3
        • 2.Qa1#
      • 1...Sc3
        • 2.dxc3#
      • 1...Sc7
        • 2.Qf4#
      • 1...Sd6!
    • 1.Bxg6?
      • threat
        • 2.Rd3#
        • 2.Qd3#
      • 1...Sa3
        • 2.Qa1#
      • 1...Sc3
        • 2.dxc3#
      • 1...Sd6
        • 2.Qf6#
      • 1...Sc7
        • 2.Qf4#
      • 1...Qxg6!
    • 1.Qa1+?
      • 1...Sc3
        • 2.Qxc3#
        • 2.dxc3#
      • 1...Qxa1!
    • 1.Qf6+?
      • 1...Be5
        • 2.Qxe5#
      • 1...Qxf6!
  • Keys
    • 1.Bc2!
      • threat
        • 2.Qd3#
      • 1...Sa3
        • 2.Qa1#
      • 1...Sc3
        • 2.dxc3#
      • 1...Sd6
        • 2.Qf6#
      • 1...Sc7
        • 2.Qf4#

This anticipates 195276(1979)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(f);S_CUTB(h)::QAR2(A)
    • B(h);N_GUARD::QAR2(A),XB(h)
    • S(b);N_GUARD,S_CUTQ(d)::QAB(A)
    • S(b);S_CUTB(h),S_CUTQ(d)::QAB(A)
    • S(b);S_CUTB(h)::QAR2(A)
  • Tries
    • Try
      • B(E);
      • Threat
        • QAR1(A)
      • Vars
        • S(b);OGATE::P(B),XS(b)
        • S(b);S_CUTB(h),S_CUTQ(d)::QAB(A)
        • S(b);S_CUTB(h)::QAR2(A)
      • Refutation
        • S(b);
    • Try
      • B(E);
      • Threat
        • QAR1(A)
      • Vars
        • P(c);N_GUARD,XB(E)::QAR1(A)
        • S(b);N_GUARD,S_CUTQ(d)::QAB(A)
        • S(b);OGATE::P(B),XS(b)
        • S(b);S_CUTB(h),S_CUTQ(d)::QAB(A)
      • Refutation
        • S(b);
    • Try
      • B(E);
      • Threat
        • DUALS(2)
      • Vars
        • P(e);XB(E)::QAR1(A)
        • S(b);N_GUARD,S_CUTQ(d)::QAB(A)
        • S(b);OGATE::P(B),XS(b)
        • S(b);S_CUTB(h)::QAR2(A)
      • Refutation
        • S(b);
    • Try
      • B(E);XP(e)
      • Threat
        • DUALS(2)
      • Vars
        • S(b);N_GUARD,S_CUTQ(d)::QAB(A)
        • S(b);OGATE::P(B),XS(b)
        • S(b);S_CUTB(h),S_CUTQ(d)::QAB(A)
        • S(b);S_CUTB(h)::QAR2(A)
      • Refutation
        • Q(d);P_PINS(H),XB(E)
    • Try
      • Q(A);CHECK
      • Refutation
        • Q(d);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • B(h);N_GUARD,P_SPINB(h)::QAB1(A),XB(h)
      • Refutation
        • Q(d);XQ(A)
  • Actual
    • B(E);
    • Threat
      • QAR1(A)
    • Vars
      • S(b);N_GUARD,S_CUTQ(d)::QAB(A)
      • S(b);OGATE::P(B),XS(b)
      • S(b);S_CUTB(h),S_CUTQ(d)::QAB(A)
      • S(b);S_CUTB(h)::QAR2(A)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).