MESON Chess Problem Database

Problem Display
PID: 223194 (2Q1N3/Bn6/2P3p1/1Rpk4/5P2/5pN1/4PK2/5B2 w - - 0 1)

Block, AB

Nashville Daily American, 1886

2Q1N3/Bn6/2P3p1/1Rpk4/5P2/5pN1/4PK2/5B2

#2

10 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Rxc5+?
      • 1...Kd4
        • 2.e3#
      • 1...Sxc5!
    • 1.Qf5+?
      • 1...Kc4
        • 2.Qd3#
      • 1...Kd4
        • 2.Qd3#
      • 1...Kxc6
        • 2.Rb6#
      • 1...gxf5!
    • 1.Qd7+?
      • 1...Kc4
        • 2.Qd3#
      • 1...Sd6!
    • 1.e3?
      • 1...Sd6
        • 2.Sf6#
        • 2.Rxc5#
      • 1...Sa5
        • 2.Rxc5#
        • 2.Qd7#
      • 1...Sd8
        • 2.Rxc5#
        • 2.Qd7#
      • 1...g5!
  • Keys
    • 1.Rb4!
      • threat
        • 2.e4#
      • 1...fxe2
        • 2.Bg2#
      • 1...Sd6
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(F);CHECK,XP(b)
      • Vars
        • K(c);P-FLIGHT::P(B)
      • Refutation
        • S(e);XR(F)
    • Try
      • Q(I);CHECK
      • Vars
        • K(c);N_SPINP(b),S_FLIGHT::QAB1(I)
        • K(c);P-FLIGHT::QAR1(I)
        • K(c);N_SPINP(b),S_FLIGHT,XP(G)::R1(F)
      • Refutation
        • P(d);XQ(I)
    • Try
      • Q(I);CHECK
      • Vars
        • K(c);N_SPINP(b),OGATE,S_FLIGHT::QAB1(I)
      • Refutation
        • S(e);P_SPINS(e)
    • Try
      • P(B);
      • Refutation
        • P(d);
  • Actual
    • R(F);N_PINP(b)
    • Threat
      • P(B)
    • Vars
      • P(a);OGATEB,XP(B)::B(A)
      • S(e);SBLOCK::S(J)
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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).