MESON Chess Problem Database

Problem Display
PID: 74844 (6B1/qN3nK1/1p2rP1p/pR6/2kB1bnR/3p4/1Q4N1/5br1 w - - 0 1)

Lies, Heinz

Tijdschrift vd KNSB, 1938

6B1/qN3nK1/1p2rP1p/pR6/2kB1bnR/3p4/1Q4N1/5br1

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Sd6#
    • 1...Se5
      • 2.Bxe6#
    • 1...Sd6
      • 2.Bxe6#
    • 1...Sh8
      • 2.Bxe6#
    • 1...a4
      • 2.Qb4#
  • Tries
    • 1.Bc3?
      • threat
        • 2.Qb3#
      • 1...a4
        • 2.Qb4#
      • 1...d2!
    • 1.Bxb6?
      • threat
        • 2.Rc5#
        • 2.Qb3#
      • 1...Rxb6
        • 2.Rc5#
      • 1...d2
        • 2.Qb3#
      • 1...Re5
        • 2.Sd6#
        • 2.Qb3#
      • 1...Rc6
        • 2.Qb3#
      • 1...Be3
        • 2.Qb3#
      • 1...Bd6
        • 2.Qb3#
      • 1...a4
        • 2.Rc5#
        • 2.Qb4#
      • 1...Qxb6!
  • Keys
    • 1.Be5!
      • threat
        • 2.Qb3#
      • 1...Rxe5
        • 2.Sd6#
      • 1...Bxe5
        • 2.Se3#
      • 1...Sgxe5
        • 2.Rxf4#
      • 1...Sfxe5
        • 2.Bxe6#
      • 1...a4
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(i);N_GUARD,P_SPINS(l),S_CUTB(e)::S(G)
    • S(l);OGATE,P_PINS(G),P_SPINR(i)::B(I),XR(i)
    • P(g);N_GUARD::QAR1(A)
  • Tries
    • Try
      • B(C);
      • Threat
        • QAB1(A)
      • Vars
        • P(g);N_GUARD::QAR1(A)
      • Refutation
        • P(c);
    • Try
      • B(C);XP(h)
      • Threat
        • DUALS(2)
      • Vars
        • R(i);P_SPINS(l),XB(C)::R1(E)
        • P(c);::QAB1(A)
        • R(i);P_SPINS(l)::QAB1(A)
        • B(e);P_SPINS(f)::QAB1(A)
      • Refutation
        • Q(k);XB(C)
  • Actual
    • B(C);
    • Threat
      • QAB1(A)
    • Vars
      • R(i);N_GUARD,P_SPINS(l),XB(C)::S(G)
      • B(e);N_GUARD,P_PINP(F),P_SPINS(f),XB(C)::S(B)
      • S(f);OGATE,P_PINS(B),P_SPINB(e),XB(C)::R(D),XB(e)
      • S(l);OGATE,P_PINS(G),P_SPINR(i),XB(C)::B(I),XR(i)
      • P(g);N_GUARD::QAR1(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).