MESON Chess Problem Database

Problem Display
PID: 232874 (3N2bK/1Q6/1nBp4/2kp3R/1p6/2NP4/7B/3R3q w - - 0 1)

Morra, Juan Carlos

Il Due Mosse, 1956

3N2bK/1Q6/1nBp4/2kp3R/1p6/2NP4/7B/3R3q

#2

9 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1
      • 2.Bxg1#
    • 1...Be6
      • 2.Sxe6#
    • 1...Bh7
      • 2.Se6#
    • 1...Sc4
      • 2.d4#
  • Tries
    • 1.Sa4+?
      • 1...Kd4
        • 2.Qxb6#
      • 1...Sxa4!
    • 1.Se4+?
      • 1...Kd4
        • 2.Qxb6#
      • 1...Qxe4!
  • Keys
    • 1.Sxd5!
      • threat
        • 2.Qxb6#
      • 1...Kd4
        • 2.Qxb6#
      • 1...Qxd5
        • 2.Bg1#
      • 1...Bxd5
        • 2.Se6#
      • 1...Sxd5
        • 2.Qa7#
      • 1...Sa4
        • 2.Qxb4#
      • 1...Sc4
        • 2.d4#
      • 1...Sd7
        • 2.Qxb4#
      • 1...Sa8
        • 2.Qxb4#
      • 1...Sc8
        • 2.Qxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 3
  • Sets
    • Q(a);N_GUARD::B(B),XQ(a)
    • B(g);N_GUARD::S(H),XB(g)
    • B(g);N_GUARD::S(H)
    • S(e);SBLOCK::P(D)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(c);N_SPINP(d),S_FLIGHT::QAB(G),XS(e)
      • Refutation
        • S(e);XS(C)
    • Try
      • S(C);CHECK
      • Vars
        • K(c);N_SPINP(d),S_FLIGHT::QAB(G),XS(e)
      • Refutation
        • Q(a);XS(C)
  • Actual
    • S(C);XP(d)
    • Threat
      • QAB1(G),XS(e)
    • Vars
      • K(c);S_FLIGHT::QAB(G),XS(e)
      • Q(a);N_GUARD,P_SPINQ(a),XS(C)::B(B)
      • B(g);N_GUARD,P_SPINB(g),XS(C)::S(H)
      • S(e);OGATEB,P_SPINS(e),XS(C)::QAB(G)
      • S(e);OGATE::QAB1(G),XP(b)
      • S(e);SBLOCK::P(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).