MESON Chess Problem Database

Problem Display
PID: 223048 (5n2/N3Bq1p/N3n2p/KpPk1b1R/1prPpP2/1P1RP3/6Q1/8 w - - 0 1)

Cortazzi, E

La Strategie, 1886

5n2/N3Bq1p/N3n2p/KpPk1b1R/1prPpP2/1P1RP3/6Q1/8

#2

12 + 11

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qe8
      • 2.Rxf5#
    • 1...Qg8
      • 2.Rxf5#
    • 1...Qxe7
      • 2.Rxf5#
    • 1...Rc1
      • 2.Sxb4#
    • 1...Rc2
      • 2.Sxb4#
    • 1...Rc3
      • 2.Sxb4#
    • 1...Rxd4
      • 2.Sxb4#
    • 1...Rxc5
      • 2.Sxb4#
    • 1...Sxd4
      • 2.Sc7#
    • 1...Sxf4
      • 2.Sc7#
    • 1...Sxc5
      • 2.Sc7#
    • 1...Sg5
      • 2.Sc7#
    • 1...Sc7
      • 2.Sxc7#
    • 1...Sg7
      • 2.Sc7#
    • 1...Sd8
      • 2.Sc7#
  • Tries
    • 1.bxc4+?
      • 1...bxc4
        • 2.Sxb4#
      • 1...Kxc4!
  • Keys
    • 1.Qg8!
      • 1...Qxh5
        • 2.Sc7#
      • 1...Qxg8
        • 2.Rxf5#
      • 1...Qxe7
        • 2.Rxf5#
      • 1...Rxd4
        • 2.Sxb4#
      • 1...Rxc5
        • 2.Sxb4#
      • 1...Sxd4
        • 2.Sc7#
      • 1...Sxf4
        • 2.Sc7#
      • 1...Sxc5
        • 2.Sc7#
      • 1...exd3
        • 2.Qg2#
      • 1...Sg5
        • 2.Sc7#
      • 1...Sc7
        • 2.Sxc7#
      • 1...Sg7
        • 2.Sc7#
      • 1...Sd8
        • 2.Sc7#
      • 1...Qg6
        • 2.Sc7#
      • 1...Qe8
        • 2.Sc7#
        • 2.Rxf5#
      • 1...Qf6
        • 2.Sc7#
      • 1...Qg7
        • 2.Sc7#
      • 1...Rc1
        • 2.Sxb4#
      • 1...Rc2
        • 2.Sxb4#
      • 1...Rc3
        • 2.Sxb4#
      • 1...Sg6
        • 2.Qa8#
      • 1...Sd7
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • Q(i);N_GUARD::R(I),XB(f)
    • Q(i);N_GUARD,XB(L)::R(I),XB(f)
    • R(b);N_GUARD::S(J),XP(a)
    • R(b);N_GUARD,P_SPINR(b),XP(E)::S(J),XP(a)
    • R(b);N_GUARD,XP(H)::S(J),XP(a)
    • S(g);N_GUARD,P_SPINS(g),XP(E)::S(J)
    • S(g);N_GUARD,XP(F)::S(J)
    • S(g);N_GUARD,XP(H)::S(J)
    • S(g);N_GUARD,N_SPINB(f)::S(J)
    • S(g);N_GUARD::S(J),XS(g)
    • S(g);N_GUARD::S(J)
  • Tries
    • Try
      • P(B);CHECK,XR(b)
      • Vars
        • P(d);SBLOCK,XP(B)::S(J),XP(a)
      • Refutation
        • K(e);N_SPINB(f),N_SPINP(c),S_FLIGHT,XP(B)
  • Actual
    • Q(A);N_PINP(c)
    • Vars
      • Q(i);N_SPINB(f),P_SPINS(g),XR(I)::S(J)
      • Q(i);N_GUARD,XQ(A)::R(I),XB(f)
      • Q(i);N_GUARD,P_SPINS(g),XB(L)::R(I),XB(f)
      • R(b);N_GUARD,P_SPINR(b),XP(E)::S(J),XP(a)
      • R(b);N_GUARD,XP(H)::S(J),XP(a)
      • S(g);N_GUARD,P_SPINQ(i),P_SPINS(g),XP(E)::S(J)
      • S(g);N_GUARD,P_SPINQ(i),XP(F)::S(J)
      • S(g);N_GUARD,P_SPINQ(i),XP(H)::S(J)
      • P(c);OGATEB,XR(C)::QAB(A)
      • S(g);N_GUARD,N_SPINB(f),P_SPINQ(i)::S(J)
      • S(g);N_GUARD,P_SPINQ(i)::S(J),XS(g)
      • S(g);N_GUARD,P_SPINQ(i)::S(J)
      • Q(i);P_SPINS(g)::S(J)
      • R(b);N_GUARD::S(J),XP(a)
      • S(k);OGATE::QAB(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).