MESON Chess Problem Database

Problem Display
PID: 223224 (8/8/4bB1Q/1B1kb1p1/2RpN3/8/4P3/3K4 w - - 0 1)

Block, AB

Nashville Daily American, 1886

8/8/4bB1Q/1B1kb1p1/2RpN3/8/4P3/3K4

#2

7 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bh2
      • 2.Rxd4#
    • 1...Bg3
      • 2.Rxd4#
    • 1...Bf4
      • 2.Rxd4#
    • 1...Bd6
      • 2.Rxd4#
    • 1...Bc7
      • 2.Rxd4#
    • 1...Bb8
      • 2.Rxd4#
  • Tries
    • 1.Sc3+?
      • 1...Kd6
        • 2.Qf8#
      • 1...dxc3!
    • 1.Qxg5?
      • threat
        • 2.Qxe5#
      • 1...Kxe4
        • 2.Qxe5#
      • 1...Bf5!
  • Keys
    • 1.Qh2!
      • threat
        • 2.Qxe5#
      • 1...Kxe4
        • 2.Qxe5#
      • 1...Bxh2
        • 2.Rxd4#
      • 1...Bxf6
        • 2.Sxf6#
      • 1...Bg3
        • 2.Rxd4#
      • 1...Bf4
        • 2.Rxd4#
      • 1...Bd6
        • 2.Rxd4#
      • 1...Bc7
        • 2.Rxd4#
      • 1...Bb8
        • 2.Rxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(c);N_GUARD::R1(C),XP(a)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB(G)
      • Refutation
        • P(a);XS(D)
    • Try
      • Q(G);P_PINB(c),XP(d)
      • Threat
        • QAR1(G),XB(c)
      • Vars
        • K(b);N_SPINB(c),P_SPINP(a),S_FLIGHT,XS(D)::QAR1(G),XB(c)
      • Refutation
        • B(e);N_SPINB(c)
  • Actual
    • Q(G);
    • Threat
      • QAR1(G),XB(c)
    • Vars
      • K(b);P_SPINP(a),S_FLIGHT,XS(D)::QAR1(G),XB(c)
      • B(c);N_GUARD,XQ(G)::R1(C),XP(a)
      • B(c);XB(F)::S(D),XB(c)
      • B(c);N_GUARD::R1(C),XP(a)
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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).