MESON Chess Problem Database

Problem Display
PID: 228864 (3KR2B/3N3B/4P3/2pr1P2/2Qpk3/4p1P1/4N1P1/bb6 w - - 0 1)

Cristoffanini, Guido

L'Echiquier, 1926

3KR2B/3N3B/4P3/2pr1P2/2Qpk3/4p1P1/4N1P1/bb6

#2

11 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Sf6#
    • 1...Rxf5
      • 2.Sxc5#
    • 1...Rd6
      • 2.f6#
    • 1...Rxd7+
      • 2.exd7#
    • 1...Bc3
      • 2.Sxc3#
  • Tries
    • 1.Be5?
      • threat
        • 2.f6#
      • 1...Rxe5
        • 2.Sf6#
      • 1...Rxd7+!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Qxd5#
      • 1...Rxd7+
        • 2.exd7#
      • 1...Rxf5
        • 2.Sxc5#
        • 2.Qd5#
      • 1...e2
        • 2.Qxe2#
      • 1...Re5
        • 2.Sf6#
      • 1...Rd6
        • 2.f6#
      • 1...Ba2
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(g);N_PINS(G),SBLOCK::S(G)
    • R(g);N_PINS(G),P_SPINR(g),XP(E)::S(G),XP(f)
    • R(g);N_GUARD::B(H)+P(E)
    • R(g);CHECK,OGATE,XS(G)::R(J)+P(F),XR(g)
    • B(a);N_GUARD::S(A),XB(a)
  • Tries
    • Try
      • B(K);
      • Threat
        • B(H)+P(E)
      • Vars
        • R(g);N_PINS(G),SBLOCK,XB(K)::S(G)
      • Refutation
        • R(g);CHECK,XS(G)
  • Actual
    • S(A);
    • Threat
      • QAB1(D),XR(g)
    • Vars
      • R(g);CHECK,OGATE,XS(G)::R(J)+P(F),XR(g)
      • P(c);OGATEB::QAR2(D),XP(c)
      • R(g);N_PINS(G),SBLOCK::S(G)
      • R(g);N_GUARD::B(H)+P(E)
      • B(b);N_GUARD::QAB1(D)
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).