MESON Chess Problem Database

Problem Display
PID: 219068 (5Rb1/2p2nB1/4p1n1/2p2kN1/B3Nrp1/K2P2R1/8/2Q5 w - - 0 1)

Campo, Achille

1st HM., Baltimore American and Commercial Advertiser, 1882

5Rb1/2p2nB1/4p1n1/2p2kN1/B3Nrp1/K2P2R1/8/2Q5

#2

9 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe4
      • 2.dxe4#
    • 1...Bh7
      • 2.Rxf7#
    • 1...e5
      • 2.Bd7#
  • Tries
    • 1.Qb2?
      • threat
        • 2.Qf6#
      • 1...e5
        • 2.Bd7#
      • 1...Se5!
    • 1.Qa1?
      • threat
        • 2.Qf6#
      • 1...e5
        • 2.Bd7#
      • 1...Se5!
    • 1.Qc3?
      • threat
        • 2.Qf6#
      • 1...e5
        • 2.Bd7#
      • 1...Se5!
    • 1.Qxc5+?
      • 1...e5
        • 2.Bd7#
      • 1...Se5!
  • Keys
    • 1.Sf3!
      • 1...Rxf3
        • 2.Qg5#
      • 1...Rxe4
        • 2.Qg5#
      • 1...Sxf8
        • 2.Sh4#
      • 1...gxf3
        • 2.Rg5#
      • 1...Sh4
        • 2.Sxh4#
      • 1...Se5
        • 2.Sh4#
      • 1...Se7
        • 2.Sh4#
      • 1...Sh8
        • 2.Sh4#
      • 1...e5
        • 2.Bd7#
      • 1...Bh7
        • 2.Rxf7#
      • 1...c4
        • 2.Sd4#
      • 1...c6
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • R(a);OGATE,XS(F)::P(C),XR(a)
    • B(i);N_GUARD::R(I),XS(h)
    • P(e);OGATEB::B(E)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • P(e);OGATEB::B(E)
      • Refutation
        • S(f);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • P(e);OGATEB::B(E)
      • Refutation
        • S(f);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • P(e);OGATEB::B(E)
      • Refutation
        • S(f);
    • Try
      • Q(A);CHECK,XP(c)
      • Vars
        • P(e);P_SPINP(e),S_CUTS(f)::B(E)
      • Refutation
        • S(f);N_SPINS(h),P_SPINS(f)
  • Actual
    • S(G);
    • Vars
      • R(a);OGATE,P_PINP(C),XS(G)::QAR1(A)
      • R(a);OGATE,XS(F)::QAR1(A)
      • S(f);N_GUARD,N_SPINS(h),XR(I)::S(G)
      • P(b);OGATE,XS(G)::R1(D)
      • S(f);N_GUARD::S(G),XS(f)
      • S(f);N_GUARD::S(G)
      • P(e);OGATEB::B(E)
      • B(i);N_GUARD::R(I),XS(h)
      • P(c);N_GUARD::S(G)
      • P(g);N_GUARD::S(F)
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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).