MESON Chess Problem Database

Problem Display
PID: 214461 (1Nr2n2/7Q/3b4/1pP1RP2/3k1n2/4N3/3K2B1/1b6 w - - 0 1)

Liberali, Giuseppe

Nuova Rivista degli Scacchi, 1878

1Nr2n2/7Q/3b4/1pP1RP2/3k1n2/4N3/3K2B1/1b6

#2

8 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5
      • 2.Qg7#
      • 2.Qh8#
    • 1...Rc6
      • 2.Sxc6#
    • 1...Rd8
      • 2.Sc6#
    • 1...Re8
      • 2.Sc6#
    • 1...Bc7
      • 2.Sc6#
    • 1...Se2
      • 2.Rd5#
    • 1...Sd3
      • 2.Rd5#
    • 1...Sh3
      • 2.Rd5#
    • 1...Sd5
      • 2.Rxd5#
    • 1...Sh5
      • 2.Rd5#
    • 1...S4e6
      • 2.Rd5#
    • 1...S4g6
      • 2.Rd5#
  • Tries
    • 1.Re4+?
      • 1...Kxc5
        • 2.Qa7#
      • 1...Bxe4!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Qa1#
      • 1...Kxe5
        • 2.Qa1#
        • 2.Qg7#
      • 1...Rxc5
        • 2.Sc6#
      • 1...Bxe5
        • 2.c6#
      • 1...Ba2
        • 2.Re4#
      • 1...Se2
        • 2.Rd5#
      • 1...Sd3
        • 2.Re4#
        • 2.Rd5#
      • 1...Sd5
        • 2.Rxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • R(f);N_GUARD::S(H),XR(f)
    • R(f);N_GUARD::S(H)
    • B(e);S_CUTR(f)::S(H)
    • S(c);N_GUARD::R1(E)
    • S(c);N_GUARD::R1(E),XS(c)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(b);S_FLIGHT,XP(D)::QAB(G)
      • Refutation
        • B(a);XR(E)
  • Actual
    • Q(G);
    • Threat
      • QAB(G)
    • Vars
      • R(f);N_GUARD,P_SPINR(f),XP(D)::S(H)
      • B(e);N_GUARD,SBLOCK,XR(E)::QAB(G)+P(D)
      • B(a);N_GUARD::R1(E)
      • S(c);N_GUARD::R1(E)
      • S(c);N_GUARD::R1(E),XS(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).