MESON Chess Problem Database

Problem Display
PID: 75548 (3B1b2/4p1pB/R2P2N1/RN3kp1/1K4p1/2p1P3/1p2Q1P1/1q6 w - - 0 1)

Laue, Kurt

1st HM., Sachsische Schachbund, 1926

3B1b2/4p1pB/R2P2N1/RN3kp1/1K4p1/2p1P3/1p2Q1P1/1q6

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Sxc3#
  • Tries
    • 1.Sd4+?
      • 1...Ke4
        • 2.Re5#
      • 1...Kf6!
    • 1.Sc7+?
      • 1...Ke4
        • 2.Re5#
      • 1...e5
        • 2.Sh4#
        • 2.Rxe5#
      • 1...Kf6!
    • 1.dxe7?
      • threat
        • 2.Sxc3#
      • 1...Qe4+
        • 2.Sd4#
      • 1...Ke4
        • 2.Sxc3#
        • 2.Sd6#
      • 1...Qa2
        • 2.Qd3#
        • 2.Qc2#
        • 2.e4#
      • 1...Qd3
        • 2.Qxd3#
      • 1...Qa1
        • 2.Qd3#
        • 2.Qc2#
        • 2.e4#
      • 1...Qd1
        • 2.e4#
      • 1...c2
        • 2.Sc3#
        • 2.Qd3#
        • 2.e4#
      • 1...Bxe7+!
  • Keys
    • 1.d7!
      • 1...Qe4+
        • 2.Sd4#
      • 1...e5+
        • 2.Se7#
      • 1...e6+
        • 2.Sd6#
      • 1...Ke4
        • 2.Sxc3#
      • 1...Qa2
        • 2.Qd3#
        • 2.Qc2#
        • 2.e4#
      • 1...Qc2
        • 2.Qxc2#
      • 1...Qd3
        • 2.Qxd3#
      • 1...Qa1
        • 2.Qd3#
        • 2.Qc2#
        • 2.e4#
      • 1...Qc1
        • 2.Qd3#
        • 2.e4#
      • 1...Qd1
        • 2.e4#
      • 1...Qe1
        • 2.Qd3#
        • 2.Qc2#
        • 2.e4#
      • 1...Qf1
        • 2.e4#
      • 1...Qg1
        • 2.Qd3#
        • 2.Qc2#
        • 2.e4#
      • 1...Qh1
        • 2.Qd3#
        • 2.Qc2#
        • 2.e4#
      • 1...c2
        • 2.Qd3#
        • 2.e4#
      • 1...g3
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • K(e);S_FLIGHT::S(F),XP(c)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(e);S_FLIGHT::R1(E)
      • Refutation
        • K(e);P-FLIGHT,P_SPINP(g)
    • Try
      • S(F);CHECK
      • Vars
        • K(e);S_FLIGHT::R1(E)
      • Refutation
        • K(e);P-FLIGHT,P_SPINP(g)
    • Try
      • P(H);P_SPINP(H),XP(g)
      • Threat
        • R(E)+S(F),XP(c)
      • Vars
        • Q(a);CHECK,SBLOCK::R(E)+S(F),DCHECK
        • Q(a);N_GUARD::QAB(A),XQ(a)
        • Q(a);N_GUARD::P(C)
      • Refutation
        • B(i);CHECK,XP(H)
  • Actual
    • P(H);
    • Vars
      • Q(a);CHECK,SBLOCK::R(E)+S(F),DCHECK
      • P(g);CHECK,SBLOCK::B(J)+S(I),DCHECK
      • P(g);CHECK,SBLOCK::R(E)+S(F),DCHECK
      • K(e);S_FLIGHT::S(F),XP(c)
      • Q(a);N_GUARD::QAB(A),XQ(a)
      • Q(a);N_GUARD::P(C)
      • P(d);N_GUARD::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).