MESON Chess Problem Database

Problem Display
PID: 265820 (8/2p5/2pr1Q1n/Pp2p3/1pk1B3/1N4p1/2Pp1bK1/1n1N4 w - - 0 1)

Monti, L

Best Problems, 2022

8/2p5/2pr1Q1n/Pp2p3/1pk1B3/1N4p1/2Pp1bK1/1n1N4

#2

7 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Qxc6#
    • 1...Re6
      • 2.Qxe6#
    • 1...Bd4
      • 2.Qf1#
    • 1...Sc3
      • 2.Sb2#
  • Tries
    • 1.Qf3?
      • threat
        • 2.Sb2#
      • 1...Rd3
        • 2.Bxd3#
        • 2.Qxd3#
      • 1...Bd4
        • 2.Bd3#
        • 2.Qe2#
        • 2.Qf1#
        • 2.Qd3#
      • 1...Be3!
    • 1.Qxd6?
      • threat
        • 2.Bd3#
        • 2.Qd3#
        • 2.Qe6#
      • 1...Bd4
        • 2.Bd3#
        • 2.Qe6#
      • 1...Sc3
        • 2.Sb2#
        • 2.Sxd2#
        • 2.Bd3#
        • 2.Qd3#
      • 1...cxd6!
    • 1.Qe6+?
      • 1...Rd5
        • 2.Bd3#
      • 1...Rxe6!
    • 1.Qf7+?
      • 1...Rd5
        • 2.Bd3#
      • 1...Re6
        • 2.Qxe6#
      • 1...Sxf7!
  • Keys
    • 1.Qxe5!
      • threat
        • 2.Sb2#
      • 1...Rd4
        • 2.Qc5#
      • 1...Bd4
        • 2.Bd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • R(j);OGATE::QAR2(G),XP(i)
    • R(j);N_GUARD::QAB(G),XR(j)
    • B(c);OGATE::QAB(G)
    • S(a);SBLOCK::S(A)
  • Tries
    • Try
      • Q(G);
      • Threat
        • S(A)
      • Refutation
        • B(c);
    • Try
      • Q(G);XR(j)
      • Threat
        • DUALS(3)
      • Refutation
        • P(l);XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • R(j);P_SPINR(j)::B(E)
      • Refutation
        • R(j);XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • R(j);P_SPINR(j)::B(E)
        • R(j);N_GUARD,P_SPINR(j)::QAB(G),XR(j)
      • Refutation
        • S(k);XQ(G)
  • Actual
    • Q(G);XP(h)
    • Threat
      • S(A)
    • Vars
      • R(j);S_CUTB(c)::QAR1(G)
      • B(c);S_CUTR(j)::B(E)
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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).