MESON Chess Problem Database

Problem Display
PID: 228966 (n7/2B1pK1p/2Q3B1/1N1P1N2/rp1bkqP1/r3P2R/4P3/8 w - - 0 1)

Mari, Alberto

9th Comm., El Ajedrez Argentino, 1926

n7/2B1pK1p/2Q3B1/1N1P1N2/rp1bkqP1/r3P2R/4P3/8

#2

11 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe3
      • 2.Sg3#
    • 1...Qe5
      • 2.Sfd6#
    • 1...Qxf5+
      • 2.Bxf5#
    • 1...Be5
      • 2.d6#
    • 1...e5
      • 2.Sd6#
      • 2.d6#
      • 2.dxe5 ep#
    • 1...e6
      • 2.dxe6#
  • Tries
    • 1.Qe6+?
      • 1...Qe5
        • 2.Sfd6#
      • 1...Be5!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qxd4#
      • 1...Qxf5+
        • 2.Bxf5#
      • 1...Qxe3
        • 2.Sg3#
      • 1...Qe5
        • 2.Sfd6#
      • 1...Rd3
        • 2.exd3#
      • 1...b3
        • 2.Sc3#
      • 1...e5
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(f);N_PINS(G),SBLOCK,XP(B)::B(I)+S(G),DCHECK
    • Q(f);N_PINS(G),SBLOCK::B(I)+S(G),DCHECK
    • Q(f);CHECK,OGATE,P_SPINQ(f),XS(G)::B(I),XQ(f)
    • B(d);SBLOCK::QAB(H)+P(F)
    • P(g);OGATE::QAB(H)+P(F),XP(g)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • Q(f);N_PINS(G),P_SPINQ(f)::B(I)+S(G),DCHECK
      • Refutation
        • B(d);P_SPINB(d)
  • Actual
    • Q(H);P_PINB(d)
    • Threat
      • QAR1(H),XB(d)
    • Vars
      • Q(f);CHECK,OGATE,P_SPINQ(f),XS(G)::B(I),XQ(f)
      • Q(f);N_PINS(G),SBLOCK,XP(B)::B(I)+S(G),DCHECK
      • Q(f);N_PINS(G),SBLOCK::B(I)+S(G),DCHECK
      • R(a);OGATE::P(A),XR(a)
      • P(c);N_GUARD,S_CUTR(a)::S(E)
      • P(g);N_GUARD,SBLOCK,S_CUTQ(f)::S(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).