MESON Chess Problem Database

Problem Display
PID: 215707 (nnQ5/2b5/p1k1K1p1/p2N2P1/P3N3/4P3/8/8 w - - 0 1)

Valle, Giovanni Batista

Reclam-Sammlung I, 1881

nnQ5/2b5/p1k1K1p1/p2N2P1/P3N3/4P3/8/8

#2

7 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sb6
      • 2.Se7#
      • 2.Qxc7#
    • 1...Sd7
      • 2.Qxa8#
  • Tries
    • 1.Kf6?
      • 1...Kxd5
        • 2.Qe6#
      • 1...Sb6
        • 2.Se7#
      • 1...Sd7+!
    • 1.Ke7?
      • 1...Kxd5
        • 2.Qe6#
      • 1...Sd7
        • 2.Qxa8#
      • 1...Sb6!
    • 1.Qxa6+?
      • 1...Bb6
        • 2.Qxa8#
      • 1...Sb6
        • 2.Se7#
      • 1...Sxa6!
    • 1.Qxb8?
      • threat
        • 2.Se7#
        • 2.Qxa8#
      • 1...Bd6
        • 2.Qxa8#
      • 1...Bd8
        • 2.Qxa8#
      • 1...Sb6
        • 2.Se7#
        • 2.Qxc7#
      • 1...Bxb8!
    • 1.Qe8+?
      • 1...Sd7
        • 2.Qxa8#
      • 1...Kb7!
  • Keys
    • 1.Kf7!
      • 1...Kxd5
        • 2.Qe6#
      • 1...Sb6
        • 2.Se7#
      • 1...Sd7
        • 2.Qxa8#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(g);OGATE::QAB(G),XS(f)
  • Tries
    • Try
      • K(F);P-FLIGHT
      • Vars
        • K(c);N_SPINB(e),S_FLIGHT,XS(D)::QAB1(G)
        • S(f);SBLOCK::S(D)
      • Refutation
        • S(g);CHECK
    • Try
      • K(F);P-FLIGHT
      • Vars
        • K(c);N_SPINB(e),S_FLIGHT,XS(D)::QAB1(G)
        • S(g);OGATE::QAB(G),XS(f)
      • Refutation
        • S(f);
    • Try
      • Q(G);CHECK,N_PINB(e),XP(b)
      • Vars
        • B(e);P_SPINB(e)::QAB(G),XS(f)
        • S(f);P_SPINS(f)::S(D)
      • Refutation
        • S(g);XQ(G)
    • Try
      • Q(G);N_PINB(e),XS(g)
      • Threat
        • DUALS(2)
      • Vars
        • B(e);::QAB(G),XS(f)
      • Refutation
        • B(e);XQ(G)
    • Try
      • Q(G);CHECK,N_PINB(e)
      • Vars
        • S(g);OGATE,P_SPINS(g)::QAB(G),XS(f)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • K(F);S_FLIGHT
    • Vars
      • K(c);N_SPINB(e),S_FLIGHT,XS(D)::QAB1(G)
      • S(f);SBLOCK::S(D)
      • S(g);OGATE,SBLOCK::QAB(G),XS(f)
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).