MESON Chess Problem Database

Problem Display
PID: 223191 (8/2pB4/3p2p1/3kp3/8/1K2P2p/2P2R2/6Q1 w - - 0 1)

Gold, Samuel

Evening Telegram, 1886

8/2pB4/3p2p1/3kp3/8/1K2P2p/2P2R2/6Q1

#2

6 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...e4
      • 2.Qg5#
  • Tries
    • 1.Rd2+?
      • 1...Kc5
        • 2.e4#
      • 1...Ke4!
    • 1.Rf4?
      • threat
        • 2.e4#
      • 1...Kc5
        • 2.e4#
      • 1...e4
        • 2.Qg5#
      • 1...exf4!
    • 1.Qd1+?
      • 1...Ke4
        • 2.Qf3#
        • 2.Qd3#
      • 1...Kc5!
    • 1.Qf1?
      • threat
        • 2.Qc4#
      • 1...Ke4
        • 2.Qd3#
      • 1...Kc5
        • 2.Qb5#
      • 1...e4!
    • 1.Qh1+?
      • 1...Kc5
        • 2.Qc6#
      • 1...e4!
    • 1.Qg2+?
      • 1...Kc5
        • 2.Qc6#
      • 1...e4
        • 2.Qg5#
      • 1...hxg2!
    • 1.Qg4?
      • threat
        • 2.Qc4#
      • 1...e4
        • 2.Qg5#
      • 1...Kc5!
    • 1.e4+?
      • 1...Kd4
        • 2.Re2#
        • 2.Rf4#
      • 1...Kc5
        • 2.Rf1#
        • 2.Rd2#
        • 2.Re2#
        • 2.Rg2#
        • 2.Rh2#
        • 2.Rf3#
        • 2.Rf4#
        • 2.Rf5#
        • 2.Rf6#
        • 2.Rf7#
        • 2.Rf8#
      • 1...Kxe4!
  • Keys
    • 1.Re2!
      • threat
        • 2.e4#
      • 1...Ke4
        • 2.Qh1#
      • 1...Kc5
        • 2.e4#
      • 1...e4
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATEB,SBLOCK::QAR(A)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB(A)+P(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(C);
      • Threat
        • P(E)
      • Vars
        • K(b);P-FLIGHT::QAB(A)+P(E)
        • P(c);OGATEB::QAR(A)
      • Refutation
        • P(c);XR(C)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(A)
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(A)
        • P(c);OGATEB,P_SPINP(c),SBLOCK::QAR(A)
      • Refutation
        • P(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • P(c);OGATEB,SBLOCK::QAR(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • P(E);CHECK
      • Refutation
        • K(b);S_FLIGHT,XP(E)
  • Actual
    • R(C);
    • Threat
      • P(E)
    • Vars
      • K(b);S_FLIGHT::QAB(A)
      • K(b);P-FLIGHT::QAB(A)+P(E)
      • P(c);OGATEB,SBLOCK::QAR(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).