MESON Chess Problem Database

Problem Display
PID: 90656 (7B/5n1N/2Q5/q2n1r2/2PrkPP1/3ppRK1/5P2/2b4b w - - 0 1)

Chicco, Adriano

Die Schwalbe, 1949

7B/5n1N/2Q5/q2n1r2/2PrkPP1/3ppRK1/5P2/2b4b

#2

9 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc4
      • 2.Qxc4#
    • 1...Rxf4
      • 2.Rxf4#
    • 1...Re5
      • 2.Sf6#
    • 1...Rg5
      • 2.Sf6#
    • 1...Rh5
      • 2.Sf6#
    • 1...Rf6
      • 2.Sxf6#
    • 1...Bb2
      • 2.Rxe3#
    • 1...Ba3
      • 2.Rxe3#
    • 1...d2
      • 2.Rxe3#
  • Tries
    • 1.Qe6+?
      • 1...Se5
        • 2.Qxf5#
      • 1...Re5!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qxf5#
      • 1...Sxf4
        • 2.Rxf4#
      • 1...Sc3
        • 2.Sf6#
      • 1...Sb4
        • 2.Sf6#
      • 1...Sb6
        • 2.Sf6#
      • 1...Sf6
        • 2.Sxf6#
      • 1...Sc7
        • 2.Sf6#
      • 1...Se7
        • 2.Sf6#
      • 1...Sd6
        • 2.Sg5#
      • 1...Sh6
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 9
  • Sets
    • R(e);OGATE,XP(D)::QAR2(G),XR(e)
    • R(i);OGATE,XP(E)::R1(B),XR(i)
    • R(i);N_GUARD::S(H)
    • R(i);N_GUARD,P_PINP(F)::S(H)
    • R(i);N_GUARD::S(H),XR(i)
    • B(a);N_GUARD::R1(B),XP(d)
    • P(c);S_CUTB(a)::R1(B),XP(d)
  • Tries
    • Try
      • Q(G);CHECK,N_PINS(h)
      • Vars
        • S(j);P_SPINS(j)::QAB1(G),XR(i)
      • Refutation
        • R(i);P_SPINR(i)
  • Actual
    • Q(G);N_PINS(h),P_PINR(i)
    • Threat
      • QAB1(G),XR(i)
    • Vars
      • S(h);OGATE,XP(E)::R1(B),XS(h)
      • S(h);N_GUARD::S(H)
      • S(h);N_GUARD::S(H),XS(h)
      • S(j);N_GUARD::S(H)
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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).