MESON Chess Problem Database

Problem Display
PID: 198769 (5N2/3B1qp1/5p2/7p/2RN2pk/4p3/5rQK/7R w - - 0 1)

Rovere, A

L'Italia Scacchistica, 1921

5N2/3B1qp1/5p2/7p/2RN2pk/4p3/5rQK/7R

#2

7 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Sf3#
    • 1...Rb2
      • 2.Sf3#
    • 1...Rc2
      • 2.Sf3#
    • 1...Rd2
      • 2.Sf3#
    • 1...Re2
      • 2.Sf3#
    • 1...Rf3
      • 2.Sxf3#
    • 1...g5
      • 2.Kg1#
  • Tries
    • 1.Qxf2+?
      • 1...exf2
        • 2.Sf3#
      • 1...g3+
        • 2.Qxg3#
      • 1...Kg5!
  • Keys
    • 1.Sh7!
      • threat
        • 2.Kg1#
      • 1...Rxg2+
        • 2.Kxg2#
      • 1...Rf1
        • 2.Qg3#
      • 1...Rf3
        • 2.Sxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • R(a);N_GUARD::S(E)
    • R(a);N_GUARD,N_PINQ(B)::S(E),XR(a)
    • P(h);SBLOCK::R(A)+K(C)
  • Tries
    • Try
      • Q(B);CHECK,N_SPINQ(B),XR(a)
      • Vars
        • P(b);XQ(B)::S(E)
        • P(c);CHECK,P_SPINP(c)::QAB1(B),XP(c)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • S(G);
    • Threat
      • R(A)+K(C)
    • Vars
      • R(a);CHECK,XQ(B)::R(A)+K(C),XR(a)
      • R(a);N_PINQ(B)::QAB1(B)
      • R(a);N_GUARD,N_PINQ(B)::S(E),XR(a)
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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).