MESON Chess Problem Database

Problem Display
PID: 276866 (B5b1/8/8/3ppPb1/2N1Pk1N/3pp3/K2B3P/3Qn3 w - - 0 1)

Ellerman, Arnoldo

To Mat, 1957

B5b1/8/8/3ppPb1/2N1Pk1N/3pp3/K2B3P/3Qn3

#2

9 + 8

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Qf3#
    • 1...Sg2
      • 2.Qf3#
    • 1...Sf3
      • 2.Qxf3#
    • 1...dxc4
      • 2.Sg6#
    • 1...dxe4
      • 2.Bxe3#
    • 1...d4
      • 2.Sg6#
  • Tries
    • 1.Bxd5?
      • threat
        • 2.Sg6#
        • 2.Bxe3#
      • 1...Bxh4
        • 2.Bxe3#
      • 1...exd2
        • 2.Sg6#
      • 1...Bf6
        • 2.Bxe3#
      • 1...Bh6
        • 2.Bxe3#
      • 1...Be7
        • 2.Bxe3#
      • 1...Bd8
        • 2.Bxe3#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Bf7
        • 2.Bxe3#
      • 1...Bh7
        • 2.Bxe3#
      • 1...Sc2
        • 2.Sg2#
        • 2.Sg6#
        • 2.Qf3#
      • 1...Sg2
        • 2.Sxg2#
        • 2.Sg6#
        • 2.Qf3#
      • 1...Bxd5!
  • Keys
    • 1.Sxe3!
      • threat
        • 2.Qg4#
      • 1...dxe4+
        • 2.Sd5#
      • 1...d4+
        • 2.Sc4#
      • 1...Kxe4
        • 2.Qa4#
      • 1...Sf3
        • 2.Qxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • S(a);N_GUARD::QAR1(A)
    • S(a);N_GUARD::QAR1(A),XS(a)
    • P(e);XS(E)::S(G)
    • P(e);P_PINS(E),XP(F)::B(C),XP(c)
    • P(e);P_PINS(E)::S(G)
  • Tries
    • Try
      • B(I);XP(e)
      • Threat
        • DUALS(2)
      • Vars
        • B(g);XS(G)::B(C),XP(c)
        • P(c);N_SPINP(c),XB(C)::S(G)
        • B(g);::B(C),XP(c)
        • S(a);N_GUARD::QAR1(A),XS(a)
        • B(h);::B(C),XP(c)
      • Refutation
        • B(h);P_PINS(E),XB(I)
  • Actual
    • S(E);XP(c)
    • Threat
      • QAR1(A)
    • Vars
      • P(e);CHECK,SBLOCK,XP(F)::B(C)+S(E),DCHECK
      • P(e);CHECK::B(C)+S(E)
      • K(d);OGATEB,P-FLIGHT,P_SPINP(e),XP(F)::QAR(A)
      • S(a);N_GUARD::QAR1(A),XS(a)
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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).