MESON Chess Problem Database

Problem Display
PID: 118172 (1B1R4/8/6K1/1p5N/4k3/7Q/8/1b3rb1 w - - 0 1)

Petkov, Petko Andonov

Themes-64, 1956

1B1R4/8/6K1/1p5N/4k3/7Q/8/1b3rb1

#2

5 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Sf6#
    • 1...Rd1
      • 2.Sf6#
    • 1...Re1
      • 2.Sf6#
    • 1...Rf3
      • 2.Qe6#
    • 1...Rf6+
      • 2.Sxf6#
    • 1...Ba2
      • 2.Qd3#
    • 1...Bd3
      • 2.Qxd3#
    • 1...Bf2
      • 2.Sf6#
  • Tries
    • 1.Qg4+?
      • 1...Rf4
        • 2.Qxf4#
      • 1...Ke3+!
    • 1.Qa3?
      • threat
        • 2.Sg3#
      • 1...Rf6+
        • 2.Sxf6#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Be3
        • 2.Qa8#
      • 1...Rf3
        • 2.Qe7#
      • 1...Bf2
        • 2.Sf6#
      • 1...Bh2!
    • 1.Qb3?
      • threat
        • 2.Sg3#
      • 1...Rf6+
        • 2.Sxf6#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Be3
        • 2.Qd5#
      • 1...Rf3
        • 2.Qe6#
      • 1...Bf2
        • 2.Sf6#
      • 1...Bh2!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Sg3#
      • 1...Rf6+
        • 2.Sxf6#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Be3
        • 2.Qc6#
      • 1...Rf3
        • 2.Qe5#
      • 1...Bf2
        • 2.Sf6#
      • 1...Bh2
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(b);N_GUARD::S(B)
    • R(b);SBLOCK::QAR2(A)
    • R(b);CHECK,N_GUARD::S(B),XR(b)
    • B(a);N_GUARD::QAB1(A)
    • B(a);N_GUARD::QAB1(A),XB(a)
    • B(c);S_CUTR(b)::S(B)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAR1(A),XR(b)
      • Refutation
        • K(d);CHECK,P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • S(B)
      • Vars
        • R(b);CHECK,N_GUARD::S(B),XR(b)
        • B(a);N_GUARD::QAB1(A),XB(a)
        • B(c);SBLOCK::QAB(A)
        • R(b);SBLOCK::QAR(A)
        • B(c);S_CUTR(b)::S(B)
      • Refutation
        • B(c);
    • Try
      • Q(A);
      • Threat
        • S(B)
      • Vars
        • R(b);CHECK,N_GUARD::S(B),XR(b)
        • B(a);N_GUARD::QAB1(A),XB(a)
        • B(c);SBLOCK::QAB1(A)
        • R(b);SBLOCK::QAR2(A)
        • B(c);S_CUTR(b)::S(B)
      • Refutation
        • B(c);
  • Actual
    • Q(A);
    • Threat
      • S(B)
    • Vars
      • R(b);CHECK,N_GUARD::S(B),XR(b)
      • B(a);N_GUARD::QAB1(A),XB(a)
      • B(c);SBLOCK::QAB(A)
      • R(b);SBLOCK::QAR1(A)
      • B(c);S_CUTR(b)::S(B)
      • B(c);N_GUARD::R1(E)
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).