MESON Chess Problem Database

Problem Display
PID: 206419 (4K3/n2BP3/1pp2R2/8/b1P1k2n/2P3Q1/5rP1/1rb2N2 w - - 0 1)

Ellerman, Arnoldo

1st Prize, Norsk Sjakkblad, 1925

4K3/n2BP3/1pp2R2/8/b1P1k2n/2P3Q1/5rP1/1rb2N2

#2

9 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rd2
      • 2.Qe3#
    • 1...Bb2
      • 2.Qe3#
    • 1...Ba3
      • 2.Qe3#
    • 1...Be3
      • 2.Qxe3#
    • 1...Sf3
      • 2.Bf5#
    • 1...Sf5
      • 2.Re6#
    • 1...Sb5
      • 2.Bxc6#
  • Tries
    • 1.Bf5+?
      • 1...Sxf5
        • 2.Re6#
      • 1...Rxf5!
    • 1.Qd3+?
      • 1...Ke5
        • 2.Qd4#
      • 1...Kxd3!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Qd4#
      • 1...Rd2
        • 2.Rf4#
      • 1...Be3
        • 2.Sg3#
      • 1...Sf3
        • 2.Bf5#
      • 1...Sf5
        • 2.Re6#
      • 1...Sb5
        • 2.Bxc6#
      • 1...c5
        • 2.Qd5#

This is a version of 83748

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(c);S_CUTB(b)::QAR1(D)
    • B(b);N_GUARD::QAR1(D)
    • B(b);N_GUARD::QAR1(D),XB(b)
    • S(f);N_GUARD,S_CUTR(c)::B(G)
    • S(f);SBLOCK::R(F)
    • S(i);N_GUARD,S_CUTB(d)::B(G),XP(h)
  • Tries
    • Try
      • B(G);CHECK
      • Vars
        • S(f);SBLOCK,XB(G)::R(F)
      • Refutation
        • R(c);XB(G)
    • Try
      • Q(D);CHECK
      • Vars
        • K(e);P-FLIGHT::QAB1(D)
      • Refutation
        • K(e);S_FLIGHT,XQ(D)
  • Actual
    • Q(D);
    • Threat
      • QAR1(D)
    • Vars
      • R(c);N_GUARD,S_CUTB(b)::R1(F)
      • B(b);SBLOCK::S(A)
      • S(f);N_GUARD,S_CUTR(c)::B(G)
      • S(f);SBLOCK::R(F)
      • S(i);N_GUARD,S_CUTB(d)::B(G),XP(h)
      • P(h);N_GUARD,P_PINB(G)::QAB1(D)
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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).