MESON Chess Problem Database

Problem Display
PID: 139577 (1B5r/K1Qb1r1n/2pPBPR1/2N1k1p1/8/p5P1/1b3N1n/3R4 w - - 0 1)

Ellerman, Arnoldo

Club Argentino de Ajedrez, 1914

1B5r/K1Qb1r1n/2pPBPR1/2N1k1p1/8/p5P1/1b3N1n/3R4

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Re7
      • 2.dxe7#
    • 1...Bd4
      • 2.Sd3#
    • 1...Bc8
      • 2.d7#
    • 1...Be8
      • 2.d7#
    • 1...Sf1
      • 2.Sg4#
    • 1...Sf3
      • 2.Sg4#
    • 1...Sg4
      • 2.Sxg4#
    • 1...Sxf6
      • 2.Rxg5#
  • Tries
    • 1.Rxg5+?
      • 1...Kxf6
        • 2.Sfe4#
      • 1...Sxg5!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qe1#
      • 1...Bxe6+
        • 2.Sd7#
      • 1...Bc8+
        • 2.d7#
      • 1...Be8+
        • 2.d7#
      • 1...Sxf6
        • 2.Rxg5#
      • 1...Bc1
        • 2.Qc3#
      • 1...Bc3
        • 2.Qxc3#
      • 1...Bd4
        • 2.Sd3#
      • 1...Sf1
        • 2.Sg4#
      • 1...Sf3
        • 2.Sg4#
      • 1...Sg4
        • 2.Sxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(h);OGATE::QAB(J)+P(E),XR(h)
    • B(a);P_PINS(D),SBLOCK::S(B)
    • B(g);OGATE,P_PINQ(J)::QAB(J)+P(E)
    • S(b);N_GUARD::S(B)
    • S(b);N_GUARD::S(B),XS(b)
    • S(i);N_GUARD,SBLOCK,XP(G)::R(H),XP(e)
  • Tries
    • Try
      • R(H);CHECK,XP(e)
      • Vars
        • K(d);S_FLIGHT,XP(G)::S(B)
      • Refutation
        • S(i);XR(H)
  • Actual
    • Q(J);
    • Threat
      • QAR(J)
    • Vars
      • B(g);CHECK,SBLOCK,XB(F)::QAR(J)+S(D),DCHECK
      • B(g);CHECK,OGATE::B(K)+P(E)
      • S(i);N_GUARD,SBLOCK,XP(G)::R(H),XP(e)
      • B(a);N_GUARD::QAB(J)
      • B(a);N_GUARD::QAB(J),XB(a)
      • B(a);P_PINS(D),SBLOCK::S(B)
      • S(b);N_GUARD::S(B)
      • S(b);N_GUARD::S(B),XS(b)
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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).