MESON Chess Problem Database

Problem Display
PID: 114186 (q1n2b1n/p1Q1Bp2/2pPk1Br/KR1b2P1/2pr4/5R2/8/8 w - - 0 1)

Stocchi, Ottavio

3rd HM., Stratford Express, 1950

q1n2b1n/p1Q1Bp2/2pPk1Br/KR1b2P1/2pr4/5R2/8/8

#2

8 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf3
      • 2.Bf5#
    • 1...Be4
      • 2.Rf6#
    • 1...Sxd6
      • 2.Qxd6#
  • Tries
    • 1.Re3+?
      • 1...Be4
        • 2.Bf5#
      • 1...Re4!
    • 1.Qd7+?
      • 1...Ke5
        • 2.Bf6#
        • 2.Qf5#
      • 1...Kxd7!
    • 1.Qxc8+?
      • 1...Ke5
        • 2.Qf5#
      • 1...Qxc8!
  • Keys
    • 1.d7!
      • threat
        • 2.d8S#
      • 1...Kxe7
        • 2.dxc8Q#
      • 1...Bxf3
        • 2.Re5#
      • 1...Bxe7
        • 2.Bf5#
      • 1...Sxe7
        • 2.Rf6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Be4
        • 2.Re5#
      • 1...Sb6
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(c);XR(A)::B(F)
    • B(c);::R1(A)
    • S(j);OGATE,XP(E)::QAR1(G),XS(j)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • B(c);P_SPINB(c)::B(F)
      • Refutation
        • R(b);P_SPINR(b)
    • Try
      • Q(G);CHECK
      • Refutation
        • K(e);S_FLIGHT,XQ(G)
    • Try
      • Q(G);CHECK,XS(j)
      • Vars
        • K(e);OGATE,P-FLIGHT,P_SPINB(c)::QAR1(G)
      • Refutation
        • Q(i);XQ(G)
  • Actual
    • P(E);
    • Threat
      • P=S
    • Vars
      • K(e);P-FLIGHT,XB(H)::PXS(j)=Q
      • B(c);OGATE,XR(A)::R1(C)
      • B(k);SBLOCK,XB(H)::B(F)
      • S(j);SBLOCK,XB(H)::R1(A)
      • S(j);N_GUARD::QAR1(G),XS(j)
      • B(c);OGATE::R1(C)
      • S(j);N_GUARD::QAR1(G)
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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).