MESON Chess Problem Database

Problem Display
PID: 210712 (3q1Q1n/4pP2/2Bpk1Pp/6p1/1pN3P1/1K3NP1/1B2pp1R/4r2r w - - 0 1)

Gockel, Hubert

StrateGems, 2019

3q1Q1n/4pP2/2Bpk1Pp/6p1/1pN3P1/1K3NP1/1B2pp1R/4r2r

#2

11 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qa5
      • 2.Qc8#
    • 1...Qb6
      • 2.Qc8#
    • 1...Qc8
      • 2.Qxc8#
    • 1...Sxf7
      • 2.Qxf7#
    • 1...h5
      • 2.Sxg5#
  • Tries
    • 1.Rxh6?
      • threat
        • 2.Sxg5#
      • 1...Sxf7
        • 2.Qxf7#
      • 1...Qa5
        • 2.Qc8#
      • 1...Rh5!
    • 1.Qxh6?
      • threat
        • 2.Sxg5#
      • 1...Qa5
        • 2.f8S#
      • 1...Sxf7!
    • 1.Qg7?
      • threat
        • 2.Sd4#
      • 1...Qb6
        • 2.f8S#
      • 1...Rd1!
    • 1.Qxd8?
      • threat
        • 2.Qd7#
        • 2.Qc8#
        • 2.f8S#
      • 1...Sxf7
        • 2.Qd7#
        • 2.Qc8#
      • 1...Sxg6!
  • Keys
    • 1.Rxf2!
      • threat
        • 2.Sd4#
      • 1...Rd1
        • 2.Rxe2#
      • 1...Qb6
        • 2.Qc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • Q(k);OGATE::QAB(K)
    • Q(k);OGATE::QAB(K),XQ(k)
    • S(l);OGATE,XP(J)::QAB1(K),XS(l)
    • P(i);N_GUARD::S(D),XP(f)
  • Tries
    • Try
      • R(B);XP(i)
      • Threat
        • S(D),XP(f)
      • Vars
        • S(l);OGATE,XP(J)::QAB1(K),XS(l)
        • Q(k);OGATE::QAB(K)
      • Refutation
        • R(b);
    • Try
      • Q(K);XP(i)
      • Threat
        • S(D),XP(f)
      • Vars
        • Q(k);N_GUARD::P=S
      • Refutation
        • S(l);XP(J)
    • Try
      • Q(K);
      • Threat
        • S(D)
      • Vars
        • Q(k);N_GUARD::P=S
      • Refutation
        • R(a);
    • Try
      • Q(K);XQ(k)
      • Threat
        • DUALS(3)
      • Refutation
        • S(l);XP(I)
  • Actual
    • R(B);XP(d)
    • Threat
      • S(D)
    • Vars
      • R(a);N_GUARD::R(B),XP(c)
      • Q(k);OGATE::QAB(K)
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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).