MESON Chess Problem Database

Problem Display
PID: 50331 (8/1NQR4/1Bn2P2/1R1N2q1/4kpB1/K1prp1P1/2b1P3/8 w - - 0 1)

Casa, Alex

HM., StrateGems, 2003

8/1NQR4/1Bn2P2/1R1N2q1/4kpB1/K1prp1P1/2b1P3/8

#2

11 + 8

145 StrateGems 2005

SOLUTION

  • SOUND
  • Sets
    • 1...Qh4
      • 2.Qxf4#
    • 1...Qxf6
      • 2.Sxf6#
    • 1...Qxd5
      • 2.Qxf4#
    • 1...Qf5
      • 2.Bf3#
    • 1...Qh5
      • 2.Qxf4#
    • 1...Qg6
      • 2.Qxf4#
    • 1...Qg7
      • 2.Qxf4#
    • 1...Qg8
      • 2.Qxf4#
    • 1...Rd1
      • 2.Sxc3#
    • 1...Rd2
      • 2.Sxc3#
    • 1...Rd4
      • 2.Sxc3#
      • 2.Sc5#
    • 1...Sd4
      • 2.Sc5#
    • 1...Se5
      • 2.Sd6#
    • 1...f3
      • 2.exf3#
  • Tries
    • 1.Rb4+?
      • 1...Rd4
        • 2.Sxc3#
        • 2.Sc5#
      • 1...Sd4
        • 2.Sc5#
      • 1...Sxb4!
    • 1.Re7+?
      • 1...Qe5
        • 2.Sd6#
      • 1...Se5
        • 2.Sd6#
      • 1...Sxe7!
    • 1.exd3+?
      • 1...Bxd3
        • 2.Sxc3#
      • 1...Kxd3!
  • Keys
    • 1.Se7!
      • threat
        • 2.Bf3#
      • 1...Qc5+
        • 2.Sxc5#
      • 1...Qxg4
        • 2.Sc5#
      • 1...Qh5
        • 2.Qxf4#
      • 1...Sd4
        • 2.Sd6#
      • 1...Se5
        • 2.Sc5#
      • 1...f3
        • 2.Bxf3#
        • 2.exf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • Q(g);N_GUARD::QAR1(J),XP(f)
    • Q(g);XP(H)::S(F),XQ(g)
    • Q(g);N_GUARD,XS(F)::QAR1(J),XP(f)
    • Q(g);SBLOCK::B(D)
    • R(c);N_GUARD::S(F),XP(b)
    • S(h);SBLOCK::S(I)
    • P(f);OGATE::P(A),XP(f)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • S(h);P_SPINS(h)::S(I)
      • Refutation
        • S(h);XR(E)
    • Try
      • R(K);CHECK
      • Vars
        • Q(g);P_SPINQ(g)::S(I)
        • S(h);P_SPINS(h)::S(I)
      • Refutation
        • S(h);XR(K)
    • Try
      • P(A);CHECK,XR(c)
      • Vars
        • B(a);XP(A)::S(F),XP(b)
      • Refutation
        • K(e);S_FLIGHT,XP(A)
  • Actual
    • S(F);
    • Threat
      • B(D)
    • Vars
      • Q(g);CHECK,N_GUARD::S(I),XQ(g)
      • Q(g);N_GUARD,XB(D)::S(I)
      • Q(g);N_GUARD::QAR1(J),XP(f)
      • S(h);S_CUTR(c)::S(I)
      • S(h);S_CUTQ(g)::S(I)
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).