MESON Chess Problem Database

Problem Display
PID: 154298 (7K/8/2Q2P2/pnpPNN2/R1r1kPP1/2b2R2/b1prn1P1/8 w - - 0 1)

Ellerman, Arnoldo

2nd Prize=, Good Companions (May), 1916

7K/8/2Q2P2/pnpPNN2/R1r1kPP1/2b2R2/b1prn1P1/8

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Bd4
      • 2.d6#
    • 1...Sed4
      • 2.Sg3#
    • 1...Sxf4
      • 2.Re3#
    • 1...Sbd4
      • 2.Sd6#
  • Tries
    • 1.Sf7?
      • threat
        • 2.Sg5#
      • 1...Sxf4
        • 2.Re3#
      • 1...Bxf6+!
    • 1.Rxc4+?
      • 1...Rd4
        • 2.d6#
      • 1...Bd4
        • 2.d6#
      • 1...Sed4
        • 2.Sg3#
        • 2.d6#
      • 1...Sbd4
        • 2.Sd6#
        • 2.d6#
      • 1...Bxc4!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Sxc5#
      • 1...Bxf6+
        • 2.Sxf6#
      • 1...Sxf4
        • 2.Re3#
      • 1...Rdd4
        • 2.Qe6#
      • 1...Bb4
        • 2.Qe6#
      • 1...Bd4
        • 2.d6#
      • 1...Sed4
        • 2.Sg3#
      • 1...Sbd4
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(e);N_SPINR(f),S_CUTR(c)::QAB(I)+P(F)
    • S(d);N_GUARD,N_SPINR(f),SBLOCK::S(H)
    • S(d);SBLOCK,XP(D)::R1(B)
    • S(i);N_GUARD,N_SPINR(f),SBLOCK::S(H)
  • Tries
    • Try
      • S(G);P_SPINP(J)
      • Threat
        • S(G)
      • Vars
        • S(d);SBLOCK,XP(D)::R1(B)
      • Refutation
        • B(e);CHECK,XP(J)
    • Try
      • R(C);CHECK,XR(f)
      • Vars
        • R(c);P_SPINR(c)::QAB(I)+P(F)
        • B(e);P_SPINB(e)::QAB(I)+P(F)
      • Refutation
        • B(a);XR(C)
  • Actual
    • S(G);P_SPINP(J)
    • Threat
      • S(G),XP(j)
    • Vars
      • B(e);CHECK,XP(J)::S(G),XB(e)
      • S(d);SBLOCK,XP(D)::R1(B)
      • R(c);N_PINP(J),N_SPINR(f),S_CUTB(e)::QAR2(I)
      • B(e);N_GUARD,N_PINP(J),N_SPINR(f)::QAR2(I)
      • B(e);N_SPINR(f),S_CUTR(c)::QAB(I)+P(F)
      • S(d);N_GUARD,N_PINP(J),N_SPINR(f),SBLOCK::S(H)
      • S(i);N_GUARD,N_PINP(J),N_SPINR(f),SBLOCK::S(H)
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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).