MESON Chess Problem Database

Problem Display
PID: 107212 (1B4K1/1BN3pp/4Rb1r/5pRp/2n2k1r/4p3/b2Q1P2/8 w - - 0 1)

Stocchi, Ottavio

La Domenica dei Giuochi, 1932

1B4K1/1BN3pp/4Rb1r/5pRp/2n2k1r/4p3/b2Q1P2/8

#2

8 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bxg5
      • 2.Qd4#
    • 1...Sb2
      • 2.Qxe3#
    • 1...Sa3
      • 2.Qxe3#
    • 1...Sa5
      • 2.Qxe3#
    • 1...Se5
      • 2.Qxe3#
    • 1...Sb6
      • 2.Qxe3#
    • 1...Sd6
      • 2.Qxe3#
  • Tries
    • 1.Sd5+?
      • 1...Kf3
        • 2.Sf4#
        • 2.Rg3#
      • 1...Kxg5!
    • 1.fxe3+?
      • 1...Sxe3
        • 2.Qxe3#
      • 1...Kxg5!
  • Keys
    • 1.Rxe3!
      • threat
        • 2.Se6#
      • 1...Se5+
        • 2.Rb3#
      • 1...Sd6+
        • 2.Re6#
      • 1...Kxg5
        • 2.Rg3#
      • 1...Bxg5
        • 2.Qd4#
      • 1...Be5
        • 2.Rf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(h);N_GUARD,SBLOCK,XR(C)::QAR2(A)
    • S(c);N_GUARD,P_PINR(D)::QAB1(A),XP(b)
  • Tries
    • Try
      • S(F);CHECK
      • Refutation
        • K(d);S_FLIGHT,XR(C)
    • Try
      • P(B);CHECK,XP(b)
      • Vars
        • S(c);OGATE,P_PINR(D),P_SPINS(c),XP(B)::QAB1(A),XS(c)
      • Refutation
        • K(d);S_FLIGHT,XR(C)
  • Actual
    • R(D);XP(b)
    • Threat
      • B(G)+S(F),DCHECK
    • Vars
      • S(c);CHECK,N_GUARD,SBLOCK::QAB(A)+R(D)
      • S(c);CHECK,N_GUARD::QAB(A)+R(D)
      • K(d);S_FLIGHT,XR(C)::QAB(A)+R(D),DCHECK
      • B(h);N_GUARD,SBLOCK,XR(C)::QAR2(A)
      • B(h);SBLOCK::QAB(A)+R(D),DCHECK
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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).