MESON Chess Problem Database

Problem Display
PID: 262741 (7n/3KB3/2pNB2N/4k3/4p1p1/4P1R1/3Pq1bn/5rQ1 w - - 0 1)

Taylor, Stephen

4th Comm., SuperProblem, 2018

7n/3KB3/2pNB2N/4k3/4p1p1/4P1R1/3Pq1bn/5rQ1

#2

9 + 9

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Sc4#
    • 1...Qf3
      • 2.Sc4#
    • 1...Qc4
      • 2.Sxc4#
    • 1...Qe1
      • 2.Sc4#
    • 1...Qf2
      • 2.Sc4#
    • 1...Ra1
      • 2.Qxa1#
    • 1...Rf2
      • 2.Qa1#
    • 1...Rf3
      • 2.Qa1#
    • 1...Rf4
      • 2.Qa1#
    • 1...Rf5
      • 2.Qa1#
    • 1...Rf6
      • 2.Qa1#
    • 1...Rf7
      • 2.Qa1#
    • 1...Rf8
      • 2.Qa1#
    • 1...Sf3
      • 2.Sxg4#
  • Tries
    • 1.Sdf7+?
      • 1...Rxf7
        • 2.Qa1#
      • 1...Sxf7!
    • 1.Sxg4+?
      • 1...Qxg4
        • 2.Sc4#
      • 1...Sxg4!
    • 1.Shf7+?
      • 1...Rxf7
        • 2.Qa1#
      • 1...Sxf7!
    • 1.Bf6+?
      • 1...Rxf6
        • 2.Qa1#
      • 1...Kxf6!
  • Keys
    • 1.Rf3!
      • threat
        • 2.Bf6#
      • 1...Qxf3
        • 2.Sc4#
      • 1...Rxf3
        • 2.Qa1#
      • 1...Bxf3
        • 2.Qg3#
      • 1...Sxf3
        • 2.Sxg4#
      • 1...exf3
        • 2.d4#
      • 1...gxf3
        • 2.Qxh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 11
  • Sets
    • Q(b);N_GUARD::S(E)
    • Q(b);N_GUARD::S(E),XQ(b)
    • R(a);OGATE::QAB(A),XR(a)
    • R(a);OGATE::QAB(A)
    • R(a);OGATE,P_PINB(I)::QAB(A)
    • S(d);N_GUARD,S_CUTQ(b)::S(G),XP(f)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • R(a);OGATE,P_PINB(I),XS(E)::QAB(A)
      • Refutation
        • S(i);XS(E)
    • Try
      • S(G);CHECK,XP(f)
      • Vars
        • Q(b);P_PINB(F),XS(G)::S(E)
      • Refutation
        • S(d);XS(G)
    • Try
      • S(G);CHECK
      • Vars
        • R(a);OGATE,P_PINB(I),XS(G)::QAB(A)
      • Refutation
        • S(i);XS(G)
    • Try
      • B(I);CHECK
      • Vars
        • R(a);OGATE,SBLOCK,XB(I)::QAB(A)
      • Refutation
        • K(g);S_FLIGHT,XB(I)
  • Actual
    • R(D);
    • Threat
      • B(I)
    • Vars
      • Q(b);N_GUARD,XR(D)::S(E)
      • R(a);OGATE,XR(D)::QAB(A)
      • B(c);OGATE,XR(D)::QAB(A)
      • S(d);N_GUARD,XR(D)::S(G),XP(f)
      • P(e);N_GUARD,XR(D)::P(B)
      • P(f);N_GUARD,XR(D)::QAB(A),XS(d)
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).