MESON Chess Problem Database

Problem Display
PID: 274482 (8/2Q5/4p3/8/2p1rP1K/2R1Pk1N/8/5B2 w - - 0 1)

Bomio, Spartaco

Nievergelt, Andreas

idee & form, 2023

8/2Q5/4p3/8/2p1rP1K/2R1Pk1N/8/5B2

#2

7 + 4

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe3
      • 2.Qc6#
      • 2.Qb7#
    • 1...Rxf4+
      • 2.Qxf4#
  • Tries
    • 1.Qe5?
      • threat
        • 2.Qh5#
      • 1...Rxf4+
        • 2.Qxf4#
        • 2.exf4#
      • 1...Rxe3
        • 2.Rxe3#
        • 2.Qxe3#
      • 1...Rd4
        • 2.exd4#
      • 1...Rxe5!
    • 1.Qg7?
      • threat
        • 2.Qg2#
        • 2.Qg3#
        • 2.Qg4#
      • 1...Rxe3
        • 2.Qg2#
        • 2.Qb7#
      • 1...Rd4
        • 2.Qg2#
      • 1...Re5
        • 2.Qg2#
      • 1...Rxf4+!
  • Keys
    • 1.Qh7!
      • threat
        • 2.Qh5#
      • 1...Rxf4+
        • 2.exf4#
      • 1...Rxe3
        • 2.Qb7#
      • 1...Rd4
        • 2.exd4#
      • 1...Re5
        • 2.e4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(c);CHECK,OGATE,XP(E)::QAR1(G),XR(c)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAB(G)
      • Vars
        • R(c);OGATE::R(B)+P(C),XR(c)
      • Refutation
        • R(c);N_PINP(E),XQ(G)
    • Try
      • Q(G);
      • Threat
        • DUALS(3)
      • Vars
        • R(c);::QAB1(G)
        • R(c);N_PINP(E)::QAB1(G)
      • Refutation
        • R(c);CHECK,XP(E)
  • Actual
    • Q(G);
    • Threat
      • QAB(G)
    • Vars
      • R(c);CHECK,OGATE,XP(E)::R(B)+P(C),XR(c)
      • R(c);N_PINP(E),OGATEB,P_SPINR(c),XP(C)::QAB(G)
      • R(c);OGATE::R(B)+P(C),XR(c)
      • R(c);N_PINP(E),OGATE::R(B)+P(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).