MESON Chess Problem Database

Problem Display
PID: 258246 (1BQ5/1p6/4pr1b/1BN5/3R1p2/5kPK/b2PNp2/2n2r1n w - - 0 1)

Ellerman, Arnoldo

Probleemblad, 1948

1BQ5/1p6/4pr1b/1BN5/3R1p2/5kPK/b2PNp2/2n2r1n

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Sxe2
      • 2.Rd3#
    • 1...Sb3
      • 2.Qxb7#
    • 1...e5
      • 2.Qg4#
  • Tries
    • 1.Rd3+?
      • 1...Sxd3
        • 2.Sd4#
      • 1...Kxe2!
    • 1.Ra4?
      • threat
        • 2.Sd4#
      • 1...Sb3
        • 2.Qxb7#
      • 1...e5
        • 2.Qg4#
      • 1...Sxe2!
    • 1.Rb4?
      • threat
        • 2.Sd4#
      • 1...Sb3
        • 2.Qxb7#
      • 1...e5
        • 2.Qg4#
      • 1...Sxe2!
    • 1.Rc4?
      • threat
        • 2.Sd4#
      • 1...Sxe2
        • 2.Qxb7#
      • 1...Sb3
        • 2.Rc3#
      • 1...e5
        • 2.Qg4#
      • 1...Kxe2!
    • 1.Re4?
      • threat
        • 2.Sd4#
      • 1...Sxe2
        • 2.Bxe2#
      • 1...e5
        • 2.Qg4#
      • 1...Sb3!
    • 1.Rxf4+?
      • 1...Bxf4
        • 2.Sd4#
      • 1...Rxf4!
    • 1.Rd5?
      • threat
        • 2.Sd4#
      • 1...Sxe2
        • 2.Rd3#
      • 1...e5
        • 2.Qg4#
      • 1...Sb3!
    • 1.Rd6?
      • threat
        • 2.Sd4#
      • 1...Sxe2
        • 2.Rd3#
      • 1...Sb3
        • 2.Qxb7#
      • 1...e5
        • 2.Qg4#
      • 1...fxg3!
    • 1.Rd7?
      • threat
        • 2.Sd4#
      • 1...Sxe2
        • 2.Rd3#
      • 1...Sb3
        • 2.Qxb7#
      • 1...e5!
  • Keys
    • 1.Rd8!
      • threat
        • 2.Sd4#
      • 1...Sxe2
        • 2.Rd3#
      • 1...Sb3
        • 2.Qxb7#
      • 1...e5
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD,SBLOCK,XS(B)::R(E)
    • S(a);S_CUTB(d)::QAB(I),XP(k)
    • P(h);OGATE::QAB1(I)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • S(a);XR(E)::S(B)
      • Refutation
        • K(f);S_FLIGHT,XS(B)
    • Try
      • R(E);
      • Threat
        • S(B)
      • Vars
        • S(a);S_CUTB(d)::QAB(I),XP(k)
        • P(h);OGATE::QAB1(I)
      • Refutation
        • S(a);XS(B)
    • Try
      • R(E);
      • Threat
        • S(B)
      • Vars
        • S(a);S_CUTB(d)::QAB(I),XP(k)
        • P(h);OGATE::QAB1(I)
      • Refutation
        • S(a);XS(B)
    • Try
      • R(E);
      • Threat
        • S(B)
      • Vars
        • S(a);SBLOCK,XS(B)::QAB(I),XP(k)
        • S(a);N_GUARD::R(E)
        • P(h);OGATE::QAB1(I)
      • Refutation
        • K(f);S_FLIGHT,XS(B)
    • Try
      • R(E);
      • Threat
        • S(B)
      • Vars
        • S(a);OGATE,XS(B)::B(F),XS(a)
        • P(h);OGATE::QAB1(I)
      • Refutation
        • S(a);
    • Try
      • R(E);CHECK,XP(g)
      • Vars
        • B(j);XR(E)::S(B)
      • Refutation
        • R(i);XR(E)
    • Try
      • R(E);
      • Threat
        • S(B)
      • Vars
        • S(a);N_GUARD,SBLOCK,XS(B)::R(E)
        • P(h);OGATE::QAB1(I)
      • Refutation
        • S(a);
    • Try
      • R(E);
      • Threat
        • S(B)
      • Vars
        • S(a);N_GUARD,SBLOCK,XS(B)::R(E)
        • S(a);S_CUTB(d)::QAB(I),XP(k)
        • P(h);OGATE::QAB1(I)
      • Refutation
        • P(g);XP(C)
    • Try
      • R(E);
      • Threat
        • S(B)
      • Vars
        • S(a);N_GUARD,SBLOCK,XS(B)::R(E)
        • S(a);S_CUTB(d)::QAB(I),XP(k)
      • Refutation
        • P(h);
  • Actual
    • R(E);
    • Threat
      • S(B)
    • Vars
      • S(a);N_GUARD,SBLOCK,XS(B)::R(E)
      • S(a);S_CUTB(d)::QAB(I),XP(k)
      • P(h);OGATE::QAB1(I)
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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).