MESON Chess Problem Database

Problem Display
PID: 273878 (3b2R1/2n2R1n/2K1p1qr/4p1kr/2Q1pNpp/7P/8/8 w - - 0 1)

Larmonov, Igor

Buletin Problemistic, 1997

3b2R1/2n2R1n/2K1p1qr/4p1kr/2Q1pNpp/7P/8/8

#2

6 + 12

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Sb5
      • 2.Sxe6#
    • 1...Sd5
      • 2.Sxe6#
    • 1...Sa6
      • 2.Sxe6#
    • 1...Sa8
      • 2.Sxe6#
    • 1...Se8
      • 2.Sxe6#
  • Tries
    • 1.Qe2?
      • threat
        • 2.Qxg4#
      • 1...gxh3
        • 2.Sxh3#
      • 1...g3
        • 2.Qg4#
      • 1...Sf6!
    • 1.Qxe4?
      • threat
        • 2.Qxe5#
      • 1...gxh3
        • 2.Sxh3#
      • 1...exf4
        • 2.Qxf4#
        • 2.Qe5#
      • 1...Bf6!
    • 1.Qc5?
      • threat
        • 2.Qxe5#
      • 1...gxh3
        • 2.Qg1#
      • 1...Sd5
        • 2.Sxe6#
      • 1...Bf6!
  • Keys
    • 1.Qxe6!
      • threat
        • 2.Rf5#
      • 1...Sxe6
        • 2.Sxe6#
      • 1...gxh3
        • 2.Sxh3#
      • 1...Bf6
        • 2.Qxg4#
      • 1...Sf6
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • S(j);N_GUARD::S(C),XP(g)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XP(b)
      • Vars
        • P(b);XP(A)::S(C),XP(b)
        • P(b);::QAR1(B)
      • Refutation
        • S(k);
    • Try
      • Q(B);XP(a)
      • Threat
        • QAR2(B),XP(d)
      • Vars
        • P(b);XP(A)::S(C),XP(b)
      • Refutation
        • B(l);
    • Try
      • Q(B);P_PINP(d)
      • Threat
        • QAR2(B),XP(d)
      • Vars
        • P(b);OGATEB,XP(A)::QAR(B)
        • S(j);N_GUARD,N_SPINP(d)::S(C),XP(g)
      • Refutation
        • B(l);
  • Actual
    • Q(B);P_SPINQ(B),XP(g)
    • Threat
      • R1(E)
    • Vars
      • S(j);XQ(B)::S(C),XS(j)
      • P(b);XP(A)::S(C),XP(b)
      • B(l);N_PINQ(B)::QAR1(B),XP(b)
      • S(k);N_PINQ(B)::QAR2(B),XP(d)
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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).