MESON Chess Problem Database

Problem Display
PID: 154300 (1K4B1/2R3P1/b2k4/1p1N1p2/6r1/1pB2Nn1/1qPb3Q/8 w - - 0 1)

Ellerman, Arnoldo

2nd Prize=, Good Companions (May), 1916

1K4B1/2R3P1/b2k4/1p1N1p2/6r1/1pB2Nn1/1qPb3Q/8

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Be5#
    • 1...Qa3
      • 2.Be5#
    • 1...Qb1
      • 2.Be5#
    • 1...Qa2
      • 2.Be5#
    • 1...Qxc2
      • 2.Be5#
    • 1...Rf4
      • 2.Qh6#
    • 1...Bf4
      • 2.Bb4#
  • Tries
    • 1.Qh6+?
      • 1...Rg6
        • 2.Qxg6#
      • 1...Bxh6!
  • Keys
    • 1.Se7!
      • threat
        • 2.Sxf5#
      • 1...Qxc2
        • 2.Be5#
      • 1...Rf4
        • 2.Qh6#
      • 1...Rg5
        • 2.Qxd2#
      • 1...Bf4
        • 2.Bb4#
      • 1...Bc8
        • 2.Sxc8#
      • 1...f4
        • 2.Qxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(a);N_GUARD::B(C)
    • Q(a);N_GUARD,XP(A)::B(C)
    • R(e);N_GUARD,N_SPINS(d),S_CUTB(b)::QAR(B)
    • B(b);N_GUARD,N_SPINS(d),S_CUTR(e)::B(C)
  • Tries
    • Try
      • Q(B);CHECK,N_PINS(d)
      • Vars
        • R(e);N_GUARD,P_SPINR(e)::QAR(B),XR(e)
      • Refutation
        • B(b);XQ(B)
  • Actual
    • S(E);
    • Threat
      • S(E),XP(g)
    • Vars
      • Q(a);N_GUARD,XP(A)::B(C)
      • R(e);N_GUARD,N_SPINS(d),S_CUTB(b)::QAR(B)
      • R(e);N_GUARD::QAR(B),XB(b)
      • B(b);N_GUARD,N_SPINS(d),S_CUTR(e)::B(C)
      • B(h);N_GUARD::S(E),XB(h)
      • P(g);N_SPINS(d),S_CUTR(e)::QAR(B),XB(b)
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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).