MESON Chess Problem Database

Problem Display
PID: 223377 (b6Q/B7/q7/1Nr1p1R1/2pp4/p5K1/3N3P/6kr w - - 0 1)

Rayner, James

Bradford Telegraph, 1886

b6Q/B7/q7/1Nr1p1R1/2pp4/p5K1/3N3P/6kr

#2

7 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxh2
      • 2.Qxh2#
    • 1...Rd5
      • 2.Kf3#
    • 1...Rc6
      • 2.Kf3#
    • 1...Bf3
      • 2.Kxf3#
    • 1...d3
      • 2.Bxc5#
  • Tries
    • 1.Kh3+?
      • 1...Bg2+
        • 2.Rxg2#
      • 1...Kf2!
    • 1.Sxd4?
      • threat
        • 2.Se2#
      • 1...Rxh2
        • 2.Qxh2#
      • 1...exd4
        • 2.Qxd4#
      • 1...Bf3
        • 2.Kxf3#
        • 2.S4xf3#
      • 1...c3!
    • 1.Qh3?
      • threat
        • 2.Qf1#
      • 1...Bg2
        • 2.Qxg2#
      • 1...Qf6!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Se2#
      • 1...Rxh2
        • 2.Qxh2#
      • 1...dxc3
        • 2.Bxc5#
      • 1...Bf3
        • 2.Kxf3#
      • 1...d3
        • 2.Bxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(b);OGATE,XP(B)::QAB1(G),XR(b)
    • R(f);P_SPINP(e)::R(E)+K(C)
    • B(i);::R(E)+K(C),XB(i)
    • P(e);OGATEB,P_SPINR(f)::B(F),XR(f)
  • Tries
    • Try
      • K(C);CHECK,P-FLIGHT,P_SPINP(B)
      • Vars
        • B(i);CHECK,N_GUARD,P_SPINB(i)::R1(E),XB(i)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);XP(e)
      • Threat
        • S(D)
      • Vars
        • R(b);OGATE,XP(B)::QAB1(G),XR(b)
        • P(g);OGATE,XS(D)::QAB(G),XP(g)
      • Refutation
        • P(d);
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • B(i);N_GUARD::QAR1(G),XB(i)
      • Refutation
        • Q(h);
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • R(b);OGATE,XP(B)::QAB1(G),XR(b)
      • P(e);OGATEB,P_SPINR(f),XS(D)::B(F),XR(f)
      • B(i);::R(E)+K(C),XB(i)
      • P(e);OGATEB,P_SPINR(f)::B(F),XR(f)
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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).