MESON Chess Problem Database

Problem Display
PID: 138612 (Q5K1/3P4/8/3RP3/R1bnkNPb/pp6/3B2P1/q1r1N3 w - - 0 1)

Ellerman, Arnoldo

L'Echiquier, 1926

Q5K1/3P4/8/3RP3/R1bnkNPb/pp6/3B2P1/q1r1N3

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1
      • 2.Rc5#
    • 1...Be2
      • 2.Rc5#
    • 1...Bd3
      • 2.Rc5#
    • 1...Bxd5+
      • 2.Qxd5#
    • 1...Sf3
      • 2.gxf3#
  • Keys
    • 1.Sed3!
      • threat
        • 2.Sc5#
      • 1...Bxd5+
        • 2.Qxd5#
      • 1...Bxd3
        • 2.Rc5#
      • 1...Bb5
        • 2.Rdxd4#
      • 1...Ba6
        • 2.Rdxd4#
      • 1...Be7
        • 2.Sf2#
      • 1...Se6
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • B(e);N_PINR(G),P_SPINS(f)::QAB(J)+R(G)
    • B(e);CHECK,OGATE,P_SPINB(e),P_SPINS(f),XR(G)::QAB1(J),XB(e)
    • S(f);OGATE,P_SPINB(e)::P(C),XS(f)
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • B(e);CHECK,OGATE,P_SPINB(e),P_SPINS(f),XR(G)::QAB1(J),XB(e)
      • B(e);N_PINR(G),P_SPINS(f),XS(A)::QAB(J)+R(G)
      • B(e);N_PINR(G),P_SPINS(f)::QAB(J)+R(G),DCHECK,XS(f)
      • B(h);N_GUARD::S(A)
      • S(f);N_PINR(G),P_SPINB(e)::QAB(J)+R(G)
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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).