MESON Chess Problem Database

Problem Display
PID: 59006 (8/8/8/4K3/5Q2/4N2p/6R1/6bk w - - 0 1)

Markovtsy, Vassyl Yuriovich

Troll, 1998

8/8/8/4K3/5Q2/4N2p/6R1/6bk

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Bf2
      • 2.Qh2#
    • 1...Bh2
      • 2.Qxh2#
    • 1...Bxe3
      • 2.Qh2#
  • Tries
    • 1.Ra2?
      • threat
        • 2.Qf3#
        • 2.Qe4#
      • 1...Bxe3
        • 2.Qh2#
      • 1...Bh2
        • 2.Qxh2#
      • 1...Bf2!
    • 1.Rb2?
      • threat
        • 2.Qf3#
        • 2.Qe4#
      • 1...Bxe3
        • 2.Qh2#
      • 1...Bh2
        • 2.Qxh2#
      • 1...Bf2!
    • 1.Rc2?
      • threat
        • 2.Qf3#
        • 2.Qe4#
      • 1...Bxe3
        • 2.Qh2#
      • 1...Bh2
        • 2.Qxh2#
      • 1...Bf2!
    • 1.Rd2?
      • threat
        • 2.Qf3#
        • 2.Qe4#
      • 1...Bxe3
        • 2.Qh2#
      • 1...Bh2
        • 2.Qxh2#
      • 1...Bf2!
    • 1.Re2?
      • threat
        • 2.Qf3#
        • 2.Qe4#
      • 1...Bxe3
        • 2.Qh2#
      • 1...Bh2
        • 2.Qxh2#
      • 1...Bf2!
    • 1.Rf2?
      • threat
        • 2.Qf3#
        • 2.Qe4#
      • 1...Bh2
        • 2.Qxh2#
      • 1...Bxf2!
    • 1.Qg3?
      • threat
        • 2.Rxg1#
      • 1...Bxe3
        • 2.Rh2#
        • 2.Qh2#
        • 2.Qxh3#
      • 1...hxg2
        • 2.Qxg2#
      • 1...Bf2
        • 2.Rh2#
        • 2.Qh2#
        • 2.Qxh3#
      • 1...Bh2
        • 2.Rxh2#
        • 2.Qxh2#
      • 1...h2!
    • 1.Qf1?
      • threat
        • 2.Qxg1#
      • 1...hxg2
        • 2.Qxg2#
      • 1...h2!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Ra2#
        • 2.Rb2#
        • 2.Rc2#
        • 2.Rd2#
        • 2.Re2#
        • 2.Rf2#
      • 1...Bh2+
        • 2.Rg3#
      • 1...Bxe3
        • 2.Qxh3#
      • 1...hxg2
        • 2.Qxg2#
      • 1...Bf2
        • 2.Qxh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAR1(C)
    • B(a);N_GUARD,P_PINQ(C)::QAR1(C),XB(a)
    • B(a);N_GUARD,XS(B)::QAR1(C)
  • Tries
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);N_GUARD,XS(B)::QAR1(C)
        • B(a);N_GUARD,P_PINQ(C)::QAR1(C),XB(a)
      • Refutation
        • B(a);
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);N_GUARD,XS(B)::QAR1(C)
        • B(a);N_GUARD,P_PINQ(C)::QAR1(C),XB(a)
      • Refutation
        • B(a);
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);N_GUARD,XS(B)::QAR1(C)
        • B(a);N_GUARD,P_PINQ(C)::QAR1(C),XB(a)
      • Refutation
        • B(a);
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);N_GUARD,XS(B)::QAR1(C)
        • B(a);N_GUARD,P_PINQ(C)::QAR1(C),XB(a)
      • Refutation
        • B(a);
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);N_GUARD,XS(B)::QAR1(C)
        • B(a);N_GUARD,P_PINQ(C)::QAR1(C),XB(a)
      • Refutation
        • B(a);
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);N_GUARD,P_PINQ(C)::QAR1(C),XB(a)
      • Refutation
        • B(a);XR(A)
    • Try
      • Q(C);
      • Threat
        • R1(A),XB(a)
      • Vars
        • P(c);OGATE,XR(A)::QAB1(C),XP(c)
      • Refutation
        • P(c);
    • Try
      • Q(C);P_PINB(a)
      • Threat
        • QAR1(C),XB(a)
      • Vars
        • P(c);OGATE,XR(A)::QAB1(C),XP(c)
      • Refutation
        • P(c);
  • Actual
    • Q(C);
    • Threat
      • DUALS(6)
    • Vars
      • B(a);CHECK,SBLOCK::QAB(C)+R(A)
      • B(a);N_GUARD,XS(B)::QAR2(C),XP(c)
      • P(c);OGATE,P_SPINP(c),XR(A)::QAB1(C),XP(c)
      • B(a);N_GUARD::QAR2(C),XP(c)
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).