MESON Chess Problem Database

Problem Display
PID: 71527 (8/8/1N2p3/1p2b3/2p1kPPN/6P1/2K1PP2/3Q3b w - - 0 1)

Grassano, Carlos A

Problem Observer, 2007

8/8/1N2p3/1p2b3/2p1kPPN/6P1/2K1PP2/3Q3b

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Bf3
      • 2.exf3#
    • 1...Bd4
      • 2.Qxh1#
    • 1...c3
      • 2.Qd3#
  • Tries
    • 1.Sf3?
      • threat
        • 2.Sg5#
      • 1...Bxf3
        • 2.exf3#
      • 1...Bxf4
        • 2.Qd4#
      • 1...Bf6!
    • 1.Sf5?
      • threat
        • 2.Qxh1#
      • 1...Bxf4
        • 2.Qd4#
      • 1...exf5
        • 2.Qd5#
      • 1...Bf3
        • 2.exf3#
      • 1...Bg2!
    • 1.Sxc4?
      • threat
        • 2.Qd3#
      • 1...Bd4
        • 2.Qxh1#
      • 1...bxc4!
    • 1.Sd7?
      • threat
        • 2.Sc5#
      • 1...Bd4
        • 2.Qxh1#
      • 1...Bd6
        • 2.Sf6#
      • 1...Bxf4!
    • 1.Qd2?
      • threat
        • 2.Qe3#
      • 1...Bxf4
        • 2.Qxf4#
      • 1...Bd4!
    • 1.e3?
      • threat
        • 2.Qxh1#
      • 1...Bxf4
        • 2.Qd4#
      • 1...Bf3
        • 2.Qxf3#
      • 1...Bg2!
  • Keys
    • 1.Qc1!
      • threat
        • 2.Qe3#
      • 1...Kd4
        • 2.Qe3#
      • 1...Bxf4
        • 2.Qxf4#
      • 1...Bd4
        • 2.Qxh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(a);OGATE::P(C),XB(a)
    • B(e);SBLOCK::QAB(A),XB(a)
    • P(b);N_GUARD::QAB1(A)
  • Tries
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • B(a);OGATE,XS(H)::P(C),XB(a)
        • B(e);N_GUARD,XP(F)::QAR1(A)
      • Refutation
        • B(e);
    • Try
      • S(H);
      • Threat
        • QAB(A),XB(a)
      • Vars
        • B(e);N_GUARD,XP(F)::QAR1(A)
        • P(f);N_GUARD,XS(H)::QAB1(A)
        • B(a);OGATE::P(C),XB(a)
      • Refutation
        • B(a);
    • Try
      • S(I);XP(b)
      • Threat
        • QAB1(A)
      • Vars
        • B(e);SBLOCK::QAB(A),XB(a)
      • Refutation
        • P(d);XS(I)
    • Try
      • S(I);
      • Threat
        • S(I)
      • Vars
        • B(e);SBLOCK::QAB(A),XB(a)
        • B(e);N_GUARD::S(I)
      • Refutation
        • B(e);XP(F)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • B(e);OGATE,XP(F)::QAR1(A),XB(e)
      • Refutation
        • B(e);
    • Try
      • P(C);
      • Threat
        • QAB(A),XB(a)
      • Vars
        • B(e);N_GUARD,XP(F)::QAR1(A)
        • B(a);N_GUARD::QAB1(A),XB(a)
      • Refutation
        • B(a);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(c);P-FLIGHT::QAB1(A)
      • B(e);OGATE,XP(F)::QAR1(A),XB(e)
      • B(e);SBLOCK::QAB(A),XB(a)
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).