MESON Chess Problem Database

Problem Display
PID: 259679 (B7/8/QK1R3B/P1P5/2rN4/2Pk4/1R1P4/8 w - - 0 1)

Pirrone, Santi

Scacchi e Scienze Applicate, 1989

B7/8/QK1R3B/P1P5/2rN4/2Pk4/1R1P4/8

#2

11 + 2

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Kb5?
      • 1...Rb4+
        • 2.Kxb4#
      • 1...Rxc5+
        • 2.Kxc5#
      • 1...Rxd4
        • 2.Kb6#
      • 1...Ra4
        • 2.Kxa4#
      • 1...Rxc3!
    • 1.Sb5+?
      • 1...Rd4
        • 2.Sa3#
        • 2.Sxd4#
        • 2.Sa7#
        • 2.Sc7#
      • 1...Ke2!
  • Keys
    • 1.Rb5!
      • 1...Rxc3
        • 2.Rb3#
      • 1...Rxd4
        • 2.Rb2#
      • 1...Rxc5
        • 2.Rxc5#
      • 1...Ra4
        • 2.Rb4#
      • 1...Rb4
        • 2.Rxb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(H);N_PINR(b),P-FLIGHT
      • Vars
        • R(b);CHECK::QAB(G)+K(H),XR(b)
        • R(b);CHECK,XP(F)::QAB(G)+K(H),XR(b)
        • R(b);P_SPINR(b),XS(D)::QAB(G)+K(H)
        • R(b);::QAB(G)+K(H),XR(b)
      • Refutation
        • R(b);XP(C)
    • Try
      • S(D);CHECK,N_PINR(b)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • R(A);N_PINR(b)
    • Vars
      • R(b);OGATEB,XP(C)::QAB(G)+R(A)
      • R(b);OGATEB,P_SPINR(b),XS(D)::QAB(G)+R(A)
      • R(b);OGATE,XP(F)::QAB(G)+R(A),XR(b)
      • R(b);OGATEB::QAB(G)+R(A)
      • R(b);OGATEB,P_PINR(A)::QAB(G)+R(A),XR(b)
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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).