MESON Chess Problem Database

Problem Display
PID: 137428 (1B1R3b/PB1n1r1Q/1PPnp3/3k2p1/R7/qP1N4/2r1NP2/3b2K1 w - - 0 1)

Latzel, Gerhard Paul

Lunds Dagblad, 1949

1B1R3b/PB1n1r1Q/1PPnp3/3k2p1/R7/qP1N4/2r1NP2/3b2K1

#2

13 + 10

6490 yacpdb 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Rf6
      • 2.Rd4#
    • 1...Rg7
      • 2.Rd4#
    • 1...Bd4
      • 2.Rxd4#
    • 1...Sc4
      • 2.cxd7#
    • 1...Se4
      • 2.Qxe4#
    • 1...Sb5
      • 2.Qe4#
    • 1...Sf5
      • 2.Qh1#
    • 1...Sxb7
      • 2.Qe4#
    • 1...Sc8
      • 2.Qe4#
    • 1...Se8
      • 2.Qe4#
    • 1...Sc5
      • 2.Rxd6#
    • 1...Se5
      • 2.Rd4#
      • 2.Qe4#
    • 1...Sxb6
      • 2.Qe4#
    • 1...Sf6
      • 2.Rd4#
    • 1...Sxb8
      • 2.Qe4#
    • 1...Sf8
      • 2.Qe4#
  • Tries
    • 1.Qh1+?
      • 1...Se4
        • 2.Qxe4#
      • 1...Rf3!
    • 1.cxd7+?
      • 1...Sxb7
        • 2.Qe4#
      • 1...Rc6!
  • Keys
    • 1.a8S!
      • threat
        • 2.Sc7#
      • 1...Sxb7
        • 2.Qe4#
      • 1...Sxb6
        • 2.Sxb6#
        • 2.Qe4#
      • 1...Sxb8
        • 2.Qe4#
      • 1...Sc4
        • 2.cxd7#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sb5
        • 2.Qe4#
      • 1...Sf5
        • 2.Qh1#
      • 1...Sc8
        • 2.Qe4#
      • 1...Se8
        • 2.Qe4#
      • 1...Sc5
        • 2.Rxd6#
      • 1...Se5
        • 2.Rd4#
        • 2.Qe4#
      • 1...Sf6
        • 2.Rd4#
      • 1...Sf8
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • R(i);S_CUTB(j)::R1(F)
    • B(j);N_GUARD,P_PINP(C)::R1(F),XB(j)
    • S(f);N_GUARD,P_SPINS(h),S_CUTR(b)::B(J)+P(H),XS(h)
    • S(f);N_GUARD,P_SPINS(h)::QAB1(K),XS(f)
    • S(f);N_GUARD,P_SPINS(h)::QAB1(K)
    • S(f);N_GUARD,P_SPINS(h),S_CUTR(i)::QAB(K)
    • S(f);N_GUARD,P_SPINS(h),XB(J)::QAB1(K)
    • S(h);OGATE,P_SPINS(f)::R1(M),XS(f)
    • S(h);P_SPINS(f),XP(G)::QAB1(K)
    • S(h);P_SPINS(f),S_CUTB(j)::R1(F)
    • S(h);P_SPINS(f),XB(L)::QAB1(K)
    • S(h);P_SPINS(f)::QAB1(K)
  • Tries
    • Try
      • Q(K);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAB1(K),XS(f)
      • Refutation
        • R(i);P_SPINR(i)
    • Try
      • P(H);CHECK,XS(h)
      • Vars
        • S(f);XB(J)::QAB1(K)
      • Refutation
        • R(b);P_SPINR(b)
  • Actual
    • P(I);
    • Threat
      • S(I)
    • Vars
      • S(f);N_GUARD,P_SPINS(h),XB(J)::QAB1(K)
      • S(h);P_SPINS(f),XB(L)::QAB1(K)
      • S(f);N_GUARD,P_SPINS(h),S_CUTR(b)::B(J)+P(H),XS(h)
      • S(f);N_GUARD,P_SPINS(h)::QAB1(K),XS(f)
      • S(f);N_GUARD,P_SPINS(h)::QAB1(K)
      • S(f);N_GUARD,P_SPINS(h),S_CUTR(i)::QAB(K)
      • S(h);OGATE,P_SPINS(f)::R1(M),XS(f)
      • S(h);P_SPINS(f),S_CUTB(j)::R1(F)
      • S(h);P_SPINS(f)::QAB1(K)
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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).