MESON Chess Problem Database

Problem Display
PID: 51647 (4b3/N1Q1pn2/Kp3r2/1p4r1/1p1kp1BR/2R1N1B1/1PPn3b/8 w - - 0 1)

Prins, Hendrik

2nd Prize, The Problemist, 2003/II

4b3/N1Q1pn2/Kp3r2/1p4r1/1p1kp1BR/2R1N1B1/1PPn3b/8

#2

10 + 12

56 The Problemist 2005
102 Probleemblad 2006

SOLUTION

  • SOUND
  • Sets
    • 1...bxc3
      • 2.Qxc3#
  • Tries
    • 1.Bf5?
      • threat
        • 2.Rd3#
      • 1...bxc3
        • 2.Qxc3#
      • 1...Rc6
        • 2.Sxb5#
      • 1...Bc6
        • 2.Qxb6#
      • 1...Se5
        • 2.Qxe5#
      • 1...Rg4!
    • 1.Be6?
      • threat
        • 2.Rd3#
      • 1...bxc3
        • 2.Qxc3#
      • 1...Rg4
        • 2.Qxb6#
      • 1...Bc6
        • 2.Sxc6#
      • 1...Se5
        • 2.Qxb6#
      • 1...Rf4!
    • 1.Qd7+?
      • 1...Rd5
        • 2.Sxb5#
        • 2.Qxd5#
      • 1...Rd6
        • 2.Sc6#
      • 1...Sd6
        • 2.Sc6#
      • 1...Bxd7!
  • Keys
    • 1.Bd7!
      • threat
        • 2.Rd3#
      • 1...bxc3
        • 2.Qxc3#
      • 1...Rg4
        • 2.Sxb5#
      • 1...Rf4
        • 2.Sc6#
      • 1...Rc6
        • 2.Sxc6#
      • 1...Se5
        • 2.Sxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATE,XR(C)::QAB1(J),XP(c)
  • Tries
    • Try
      • B(F);P_PINP(e)
      • Threat
        • R1(C)
      • Vars
        • P(c);OGATE,XR(C)::QAB1(J),XP(c)
        • R(i);S_CUTB(l)::S(I),XP(f)
        • B(l);S_CUTR(i)::QAB(J),XP(h)
        • S(k);N_GUARD::QAB1(J),XS(k)
      • Refutation
        • R(g);N_SPINP(e)
    • Try
      • B(F);P_PINP(e)
      • Threat
        • R1(C)
      • Vars
        • P(c);OGATE,XR(C)::QAB1(J),XP(c)
        • R(g);N_GUARD,N_SPINP(e)::QAB(J),XP(h)
        • B(l);N_GUARD::S(I),XB(l)
        • S(k);S_CUTR(g)::QAB(J),XP(h)
      • Refutation
        • R(i);N_SPINP(e)
    • Try
      • Q(J);CHECK
      • Vars
        • R(i);P_SPINR(i)::S(I)
        • S(k);P_SPINS(k)::S(I)
      • Refutation
        • B(l);XQ(J)
  • Actual
    • B(F);P_PINP(e)
    • Threat
      • R1(C)
    • Vars
      • P(c);OGATE,XR(C)::QAB1(J),XP(c)
      • R(g);N_GUARD,N_SPINP(e)::S(I),XP(f)
      • R(i);N_GUARD,N_SPINP(e)::S(I)
      • R(i);N_GUARD::S(I),XR(i)
      • S(k);S_CUTR(g)::S(I),XP(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).