MESON Chess Problem Database

Problem Display
PID: 72889 (5Q2/7p/2p1P1p1/4k1NP/3pP1R1/3p4/Brqn1NKb/2B3n1 w - - 0 1)

Ellerman, Arnoldo

Tijdschrift vd KNSB, 1936

5Q2/7p/2p1P1p1/4k1NP/3pP1R1/3p4/Brqn1NKb/2B3n1

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Sxd3#
    • 1...Qa4
      • 2.Sxd3#
    • 1...Qxc1
      • 2.Sxd3#
    • 1...Qc5
      • 2.Sxd3#
    • 1...Bf4
      • 2.Qxf4#
    • 1...Sxe4
      • 2.Rxe4#
  • Tries
    • 1.Rg3?
      • threat
        • 2.Sg4#
      • 1...Sxe4
        • 2.Bf4#
        • 2.Qf4#
      • 1...Qd1
        • 2.Sxd3#
      • 1...Sb1
        • 2.Bf4#
        • 2.Qf4#
      • 1...Sf1
        • 2.Bf4#
        • 2.Qf4#
      • 1...Sb3
        • 2.Bf4#
        • 2.Qf4#
      • 1...Sdf3
        • 2.Bf4#
        • 2.Qf4#
      • 1...Sc4
        • 2.Bf4#
        • 2.Qf4#
      • 1...gxh5!
  • Keys
    • 1.Rf4!
      • threat
        • 2.Sg4#
      • 1...Sxe4
        • 2.Sf7#
        • 2.Rxe4#
      • 1...gxh5
        • 2.Rf5#
      • 1...Qd1
        • 2.Sxd3#
      • 1...Sb1
        • 2.Sf7#
      • 1...Sf1
        • 2.Sf7#
      • 1...Sb3
        • 2.Qb8#
      • 1...Sdf3
        • 2.Sf7#
      • 1...Sc4
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 5
  • Sets
    • Q(c);N_GUARD::S(C),XP(f)
    • Q(c);N_GUARD,XB(A)::S(C),XP(f)
    • B(e);N_GUARD::QAB1(J),XB(e)
    • S(d);OGATE,P_PINS(C),XP(E)::R1(F),XS(d)
  • Tries
    • Try
      • R(F);
      • Threat
        • S(C)
      • Vars
        • Q(c);N_GUARD::S(C),XP(f)
      • Refutation
        • P(j);XP(H)
  • Actual
    • R(F);
    • Threat
      • S(C)
    • Vars
      • P(j);N_GUARD,XP(H)::R1(F)
      • Q(c);N_GUARD::S(C),XP(f)
      • S(d);P_PINS(C)::S(G)
      • S(d);P_PINS(C),S_CUTR(b)::QAB(J)
      • S(d);P_PINS(C),S_CUTQ(c)::QAR2(J)
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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).