MESON Chess Problem Database

Problem Display
PID: 228987 (8/2Q5/2r1r3/3k4/3N2P1/1PB1PP2/N7/2K5 w - - 0 1)

Mari, Alberto

L'Italia Scacchistica, 1926

8/2Q5/2r1r3/3k4/3N2P1/1PB1PP2/N7/2K5

#2

9 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc3+
      • 2.Sxc3#
    • 1...Rc4
      • 2.bxc4#
    • 1...Rc5
      • 2.Sb4#
    • 1...Ra6
      • 2.Sb4#
    • 1...Rcd6
      • 2.Qa5#
    • 1...Re5
      • 2.Qxc6#
  • Tries
    • 1.Qxc6+?
      • 1...Ke5
        • 2.Sc2#
        • 2.Se2#
        • 2.Sb5#
        • 2.Sf5#
        • 2.Sxe6#
        • 2.Qxe6#
      • 1...Rxc6!
    • 1.Qd7+?
      • 1...Ke5
        • 2.Sxc6#
      • 1...Rcd6
        • 2.Qb5#
      • 1...Red6
        • 2.Qf5#
      • 1...Kc5!
  • Keys
    • 1.Qd8+!
      • 1...Kc5
        • 2.Bb4#
      • 1...Ke5
        • 2.Sxc6#
      • 1...Rcd6
        • 2.Qa5#
      • 1...Red6
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(b);CHECK,XB(D)::S(B),XR(b)
    • R(b);OGATE::P(C),XR(b)
    • R(b);::S(B)
    • R(b);N_PINB(D)::S(B)
    • R(b);N_GUARD,N_PINB(D),SBLOCK::QAR(I)
    • R(c);N_GUARD,SBLOCK::QAB1(I),XR(b)
  • Tries
    • Try
      • Q(I);CHECK,N_SPINB(D),XR(b)
      • Refutation
        • R(c);P_PINB(D),XQ(I)
    • Try
      • Q(I);CHECK
      • Vars
        • K(a);P-FLIGHT::B(D)+S(G),DCHECK,XR(b)
        • R(b);N_PINB(D),OGATE,P_SPINR(b),SBLOCK::QAR2(I)
        • R(c);OGATE,P_SPINR(c),SBLOCK::QAR2(I)
      • Refutation
        • K(a);N_PINB(D),P-FLIGHT
  • Actual
    • Q(I);CHECK
    • Vars
      • K(a);N_PINB(D),P-FLIGHT::B(D)
      • K(a);P-FLIGHT::B(D)+S(G),DCHECK,XR(b)
      • R(b);N_GUARD,N_PINB(D),P_SPINR(b),SBLOCK::QAR(I)
      • R(c);N_GUARD,P_SPINR(c),SBLOCK::QAR(I)
HTML5 logo

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).