MESON Chess Problem Database

Problem Display
PID: 183648 (QBb5/2r1p3/N1n5/1qp2p1N/2P1kP2/2P1p1pB/2P3K1/3R4 w - - 0 1)

Garofalo, Antonio

Sardella, Giuseppe

Best Problems, 2018

QBb5/2r1p3/N1n5/1qp2p1N/2P1kP2/2P1p1pB/2P3K1/3R4

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.Sxc5#
    • 1...Qb1
      • 2.Sxc5#
    • 1...Qb2
      • 2.Sxc5#
    • 1...Qb3
      • 2.Sxc5#
    • 1...Qb7
      • 2.Sxc5#
    • 1...Qxb8
      • 2.Sxc5#
    • 1...Ra7
      • 2.Sxg3#
    • 1...Rb7
      • 2.Sxg3#
    • 1...Rd7
      • 2.Sxg3#
  • Tries
    • 1.Qxc6+?
      • 1...Rxc6
        • 2.Sxg3#
      • 1...Qxc6!
  • Keys
    • 1.Rd5!
      • threat
        • 2.Re5#
      • 1...Qb7
        • 2.Sxc5#
      • 1...Rb7
        • 2.Sxg3#
      • 1...Bb7
        • 2.Bxf5#
      • 1...Se5
        • 2.Rd4#
        • 2.Rxe5#
      • 1...e5
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • Q(d);N_GUARD::S(I),XP(e)
    • Q(d);N_GUARD,P_PINP(B)::S(I),XP(e)
    • Q(d);N_GUARD,N_SPINS(g)::S(I),XP(e)
    • Q(d);N_GUARD,XB(K)::S(I),XP(e)
    • R(h);::S(H),XP(b)
    • R(h);N_SPINS(g)::S(H),XP(b)
  • Tries
    • Try
      • Q(J);CHECK,XS(g)
      • Vars
        • R(h);XQ(J)::S(H),XP(b)
      • Refutation
        • Q(d);XQ(J)
  • Actual
    • R(A);N_PINS(g)
    • Threat
      • R1(A)
    • Vars
      • Q(d);N_GUARD::S(I),XP(e)
      • R(h);::S(H),XP(b)
      • B(j);N_GUARD::B(E),XP(f)
      • P(i);::R1(A),XP(i)
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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).