MESON Chess Problem Database

Problem Display
PID: 274558 (qn1B2n1/1p4b1/1R1NK3/2k2p2/2prP2R/1B2Q3/p7/N7 w - - 0 1)

Havran, Jozef

Pat a Mat, 2023

qn1B2n1/1p4b1/1R1NK3/2k2p2/2prP2R/1B2Q3/p7/N7

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qa3
      • 2.Sxb7#
    • 1...Qa4
      • 2.Sxb7#
    • 1...Qa5
      • 2.Sxb7#
    • 1...Sc6
      • 2.Rb5#
    • 1...cxb3
      • 2.Sxb3#
    • 1...fxe4
      • 2.Sxe4#
  • Tries
    • 1.Ba4?
      • threat
        • 2.Qa3#
      • 1...Qxa4
        • 2.Sxb7#
      • 1...Qa5
        • 2.Sxb7#
      • 1...Sc6
        • 2.Rb5#
      • 1...c3
        • 2.Sb3#
      • 1...Sa6!
    • 1.Bxc4?
      • threat
        • 2.Sb3#
      • 1...Qa3
        • 2.Qxa3#
      • 1...Qa4!
    • 1.e5?
      • threat
        • 2.Qxd4#
      • 1...Sc6
        • 2.Rb5#
      • 1...f4
        • 2.Se4#
      • 1...Bxe5!
  • Keys
    • 1.exf5!
      • threat
        • 2.Se4#
      • 1...cxb3
        • 2.Sxb3#
      • 1...Sf6
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • Q(h);N_GUARD::S(G),XP(f)
    • S(i);SBLOCK::R1(F)
    • P(b);XB(B)::S(A),XP(b)
    • P(e);XP(D)::S(G),XP(e)
  • Tries
    • Try
      • B(B);
      • Threat
        • QAB(C)
      • Vars
        • Q(h);N_GUARD,XB(B)::S(G),XP(f)
        • Q(h);N_GUARD::S(G),XP(f)
        • S(i);SBLOCK::R1(F)
        • P(b);N_GUARD::S(A)
      • Refutation
        • S(i);
    • Try
      • B(B);XP(b)
      • Threat
        • S(A)
      • Vars
        • Q(h);N_GUARD::QAB(C),XQ(h)
      • Refutation
        • Q(h);
    • Try
      • P(D);
      • Threat
        • QAB1(C),XR(c)
      • Vars
        • S(i);SBLOCK::R1(F)
        • P(e);N_GUARD::S(G)
      • Refutation
        • B(g);XP(D)
  • Actual
    • P(D);XP(e)
    • Threat
      • S(G)
    • Vars
      • P(b);XB(B)::S(A),XP(b)
      • S(j);S_CUTB(g)::QAB1(C),XR(c)
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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).