MESON Chess Problem Database

Problem Display
PID: 265669 (8/8/6K1/1np1p3/2PBkpR1/1n4RQ/3r4/1N6 w - - 0 1)

Lipton, Michael

Variantim, 2022

8/8/6K1/1np1p3/2PBkpR1/1n4RQ/3r4/1N6

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd4
      • 2.Re3#
      • 2.Qg2#
      • 2.Qh1#
    • 1...S3xd4
      • 2.Sxd2#
      • 2.Re3#
    • 1...S5xd4
      • 2.Sc3#
      • 2.Re3#
  • Tries
    • 1.Sxd2+?
      • 1...Kxd4
        • 2.Rd3#
      • 1...Sxd2!
    • 1.Rc3?
      • threat
        • 2.Qe3#
      • 1...Kxd4
        • 2.Qe3#
      • 1...cxd4
        • 2.Qf3#
      • 1...Re2
        • 2.Qd3#
      • 1...Rd3
        • 2.Qxd3#
      • 1...exd4!
    • 1.Rxf4+?
      • 1...Kxf4
        • 2.Rg4#
        • 2.Qg4#
        • 2.Qh4#
      • 1...exf4!
    • 1.Qg2+?
      • 1...Kxd4
        • 2.Qd5#
      • 1...Rxg2!
    • 1.Qh1+?
      • 1...Kxd4
        • 2.Qd5#
      • 1...Rg2!
    • 1.Qh5?
      • threat
        • 2.Qxe5#
      • 1...Rxd4
        • 2.Qh1#
        • 2.Qf5#
      • 1...S3xd4
        • 2.Sxd2#
      • 1...S5xd4
        • 2.Sc3#
      • 1...cxd4
        • 2.Qf5#
      • 1...exd4
        • 2.Qd5#
        • 2.Qf5#
      • 1...Kxd4!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qxe5#
      • 1...Kxd4
        • 2.Rxf4#
      • 1...Rxd4
        • 2.Qh1#
      • 1...S3xd4
        • 2.Sxd2#
      • 1...S5xd4
        • 2.Sc3#
      • 1...cxd4
        • 2.Qa8#
      • 1...exd4
        • 2.Qe8#

This is after

After BG Laws, 1883.

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(A);CHECK,XR(a)
      • Vars
        • K(c);P-FLIGHT,S_CUTS(b),XB(E)::R1(B)
      • Refutation
        • S(b);XS(A)
    • Try
      • R(B);
      • Threat
        • QAR1(C)
      • Vars
        • K(c);P-FLIGHT,XB(E)::QAB1(C)
        • P(f);SBLOCK,XB(E)::QAB1(C)
        • R(a);N_GUARD::QAB1(C)
        • R(a);N_GUARD::QAB1(C),XR(a)
      • Refutation
        • P(g);XB(E)
    • Try
      • R(F);CHECK,XP(d)
      • Refutation
        • P(g);XR(F)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);OGATE,P-FLIGHT,XB(E)::QAR1(C)
      • Refutation
        • R(a);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);OGATE,P-FLIGHT,XB(E)::QAR1(C)
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • Q(C);
      • Threat
        • QAR1(C),XP(g)
      • Vars
        • S(b);N_GUARD,SBLOCK,XB(E)::S(A),XR(a)
        • S(e);N_GUARD,SBLOCK,XB(E)::S(A)
        • P(f);SBLOCK,XB(E)::QAB1(C)
      • Refutation
        • K(c);P-FLIGHT,XB(E)
  • Actual
    • Q(C);
    • Threat
      • QAR1(C),XP(g)
    • Vars
      • K(c);N_GUARD,P-FLIGHT,S_CUTP(g),XB(E)::R(F),XP(d)
      • R(a);N_GUARD,SBLOCK,XB(E)::QAB(C)
      • S(b);N_GUARD,SBLOCK,XB(E)::S(A),XR(a)
      • S(e);N_GUARD,SBLOCK,XB(E)::S(A)
      • P(f);SBLOCK,XB(E)::QAB(C)
      • P(g);OGATEB,SBLOCK,XB(E)::QAR(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).