MESON Chess Problem Database

Problem Display
PID: 45040 (2n5/3p4/1n1rp3/b1B2P2/4k1B1/2R1N2p/K1P1p2Q/8 w - - 0 1)

Planck, Charles

Ottawa Citizen, 1886

2n5/3p4/1n1rp3/b1B2P2/4k1B1/2R1N2p/K1P1p2Q/8

#2

8 + 9

3316 Chess Problem Text Book 1887
15351 SCPF/BCPS Black Books 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.cxd3#
    • 1...Sd5
      • 2.Rc4#
  • Tries
    • 1.Bxd6?
      • threat
        • 2.Qf4#
        • 2.Qe5#
      • 1...Kd4
        • 2.Qe5#
      • 1...Bxc3
        • 2.Qf4#
      • 1...Sc4
        • 2.Qf4#
      • 1...Sd5
        • 2.Qe5#
      • 1...e5
        • 2.Qxe5#
      • 1...Sxd6!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Sf6#
      • 1...Kxd5
        • 2.Bf3#
      • 1...Rxd5
        • 2.Re3#
      • 1...Bxc3
        • 2.Sxc3#
      • 1...Sxd5
        • 2.Rc4#
      • 1...exd5
        • 2.Re3#
      • 1...exf5
        • 2.Bf3#
      • 1...e5
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • R(f);OGATE::P(B),XR(f)
    • S(e);N_GUARD,S_CUTR(f)::R(D)
  • Tries
    • Try
      • B(G);XR(f)
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT::QAB1(C)
        • B(d);XR(D)::QAR1(C)
        • S(e);::QAR1(C)
        • P(g);::QAR1(C),XP(g)
      • Refutation
        • S(i);XB(G)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(c);S_FLIGHT,XS(E)::B(F)
      • R(f);SBLOCK,XS(E)::R1(D)
      • B(d);XR(D)::S(E),XB(d)
      • S(e);N_GUARD,SBLOCK,XS(E)::R(D)
      • P(g);SBLOCK,XS(E)::R1(D)
      • P(g);SBLOCK,XP(H)::B(F)
      • P(g);SBLOCK::QAB(C)
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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).