MESON Chess Problem Database

Problem Display
PID: 83537 (3q1b2/2p5/2Qn4/1p1p4/Nr6/2Bk1B2/b6R/3rnN1K w - - 0 1)

Ellerman, Arnoldo

Good Companions, 1920

3q1b2/2p5/2Qn4/1p1p4/Nr6/2Bk1B2/b6R/3rnN1K

#2

7 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Rd2#
    • 1...Rdb1
      • 2.Rd2#
    • 1...Rc1
      • 2.Rd2#
    • 1...Rd2
      • 2.Rxd2#
    • 1...Rb2
      • 2.Sxb2#
    • 1...Rb3
      • 2.Qxd5#
    • 1...Rd4
      • 2.Sb2#
    • 1...Re4
      • 2.Sb2#
    • 1...Rf4
      • 2.Sb2#
    • 1...Rg4
      • 2.Sb2#
    • 1...Rh4
      • 2.Sb2#
    • 1...Bb3
      • 2.Sb2#
    • 1...Sc4
      • 2.Qg6#
  • Tries
    • 1.Qxd5+?
      • 1...Rd4
        • 2.Qxd4#
      • 1...Bxd5!
  • Keys
    • 1.Be5!
      • threat
        • 2.Qc3#
      • 1...Sxf3
        • 2.Qc2#
      • 1...Rc1
        • 2.Rd2#
      • 1...Rb3
        • 2.Qxd5#
      • 1...Rc4
        • 2.Sb2#
      • 1...Bc4
        • 2.Sc5#
      • 1...Sc4
        • 2.Qg6#
      • 1...Se4
        • 2.Be2#
      • 1...d4
        • 2.Be2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 10
  • Sets
    • R(a);N_GUARD::R1(C)
    • R(a);N_GUARD::R1(C),XR(a)
    • R(e);N_GUARD::S(F),XR(e)
    • R(e);N_GUARD,S_CUTB(c)::QAR2(G),XP(g)
    • R(e);N_GUARD::S(F)
    • R(e);N_GUARD,P_PINR(C)::S(F)
    • B(c);S_CUTR(e)::S(F)
    • S(h);OGATE,SBLOCK::QAB(G)
  • Tries
    • Try
      • Q(G);CHECK,XP(g)
      • Vars
        • R(e);N_GUARD,P_SPINR(e)::QAR1(G),XR(e)
      • Refutation
        • B(c);P_PINB(E),XQ(G)
  • Actual
    • B(D);
    • Threat
      • QAR1(G)
    • Vars
      • S(b);N_GUARD,P_PINS(A),XB(E)::QAB1(G)
      • R(a);N_GUARD::R1(C)
      • R(e);N_GUARD,S_CUTB(c)::QAR2(G),XP(g)
      • R(e);N_GUARD::S(F)
      • B(c);SBLOCK::S(F)
      • S(h);OGATE,SBLOCK::QAB(G)
      • S(h);SBLOCK::B(E)
      • P(g);::B(E)
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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).