MESON Chess Problem Database

Problem Display
PID: 202564 (n7/2p4p/1pR1p2P/1P2P2Q/6N1/5k1B/p1P1p1N1/B1R1K3 w - - 0 1)

White, Alain Campbell

San Francisco Chronicle, 1923

n7/2p4p/1pR1p2P/1P2P2Q/6N1/5k1B/p1P1p1N1/B1R1K3

#2

12 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kg3
      • 2.Rc3#
    • 1...Ke4
      • 2.Sf6#
  • Tries
    • 1.Sh2+?
      • 1...Ke4
        • 2.Qf3#
      • 1...Kg3!
    • 1.S4e3+?
      • 1...Ke4
        • 2.Rc4#
        • 2.Qg4#
      • 1...Kg3!
    • 1.Rxc7?
      • 1...Kg3
        • 2.Rc3#
      • 1...Ke4
        • 2.Sf6#
      • 1...Sxc7!
    • 1.Qg6?
      • threat
        • 2.Sh2#
        • 2.Rc3#
        • 2.Qd3#
      • 1...Kg3
        • 2.Rc3#
        • 2.Qd3#
      • 1...hxg6!
    • 1.Qf7+?
      • 1...Kg3
        • 2.Rc3#
      • 1...Ke4!
    • 1.Qe8?
      • 1...Kg3
        • 2.Rc3#
      • 1...Ke4!
    • 1.Qf5+?
      • 1...Kg3
        • 2.Rc3#
        • 2.Qd3#
      • 1...exf5!
    • 1.Qg5?
      • threat
        • 2.Qe3#
        • 2.Qf4#
      • 1...Kg3
        • 2.Rc3#
        • 2.Qe3#
      • 1...Ke4!
  • Keys
    • 1.c4!
      • 1...Kg3
        • 2.Rc3#
      • 1...Ke4
        • 2.Sf2#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT::R(K)
    • K(c);S_FLIGHT::S(G)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(J)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • S(G);CHECK
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • R(K);XP(f)
      • Vars
        • K(c);P-FLIGHT::R(K)
        • K(c);S_FLIGHT::S(G)
      • Refutation
        • S(h);XR(K)
    • Try
      • Q(J);
      • Threat
        • DUALS(3)
      • Refutation
        • P(g);XQ(J)
    • Try
      • Q(J);CHECK
      • Vars
        • K(c);P-FLIGHT::R(K)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(J);
      • Vars
        • K(c);P-FLIGHT::R(K)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(J);CHECK
      • Refutation
        • P(e);XQ(J)
    • Try
      • Q(J);
      • Threat
        • DUALS(2)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • P(D);
    • Vars
      • K(c);P-FLIGHT::R(B)
      • K(c);S_FLIGHT::S(G)
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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).