MESON Chess Problem Database

Problem Display
PID: 176476 (8/5R2/8/p1P5/K2P4/3p1brp/1Q2Pk1p/4R2B w - - 0 1)

Oudot, Jean

Schach-Echo, 1970

8/5R2/8/p1P5/K2P4/3p1brp/1Q2Pk1p/4R2B

#2

8 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.exf3#
    • 1...dxe2
      • 2.Qxe2#
  • Tries
    • 1.exf3+?
      • 1...d2
        • 2.Qxd2#
      • 1...Kxe1!
    • 1.e3+?
      • 1...d2
        • 2.Qxd2#
      • 1...Kxe1!
    • 1.e4+?
      • 1...d2
        • 2.Qxd2#
      • 1...Kxe1!
  • Keys
    • 1.Qd2!
      • threat
        • 2.exd3#
        • 2.exf3#
        • 2.e3#
        • 2.e4#
      • 1...dxe2
        • 2.Qxe2#
      • 1...Rg1
        • 2.Rxf3#
      • 1...Rg2
        • 2.Rxf3#
      • 1...Rg4
        • 2.Rxf3#
      • 1...Rg5
        • 2.Rxf3#
      • 1...Rg6
        • 2.Rxf3#
      • 1...Rg7
        • 2.Rxf3#
      • 1...Rg8
        • 2.Rxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • K(a);N_SPINB(d),S_FLIGHT::R(A)+P(D),XB(d)
    • P(c);OGATE,P_SPINP(c),XP(D)::QAR1(C),XP(c)
  • Tries
    • Try
      • P(D);CHECK,XB(d)
      • Vars
        • P(c);P_SPINP(c)::QAR2(C),XP(c)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • P(D);CHECK
      • Vars
        • P(c);P_SPINP(c)::QAR2(C),XP(c)
      • Refutation
        • K(a);N_SPINB(d),S_FLIGHT,XR(A)
    • Try
      • P(D);CHECK
      • Vars
        • P(c);P_SPINP(c)::QAR2(C),XP(c)
      • Refutation
        • K(a);N_SPINB(d),S_FLIGHT,XR(A)
  • Actual
    • Q(C);
    • Threat
      • DUALS(4)
    • Vars
      • P(c);OGATE,P_SPINP(c),XP(D)::QAR1(C),XP(c)
      • R(e);N_GUARD::R1(H),XB(d)
      • R(e);N_GUARD,P_PINP(F)::R1(H),XB(d)
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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).