MESON Chess Problem Database

Problem Display
PID: 144314 (6B1/K2R4/1Np2k2/1b2p2P/Q2n2P1/5N2/8/B3r1b1 w - - 0 1)

Michel, Francois

Monreal, Pierre

diagrammes, 1973

6B1/K2R4/1Np2k2/1b2p2P/Q2n2P1/5N2/8/B3r1b1

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Qf4#
    • 1...Se2
      • 2.Bxe5#
    • 1...Sb3
      • 2.Qf4#
    • 1...Sxf3
      • 2.Qf4#
    • 1...Sf5
      • 2.g5#
    • 1...Se6
      • 2.Rf7#
    • 1...c5
      • 2.Sd5#
  • Tries
    • 1.Qa3?
      • threat
        • 2.Qe7#
        • 2.Qf8#
      • 1...Sxf3
        • 2.Qe7#
      • 1...Bc4
        • 2.Qe7#
      • 1...Sf5
        • 2.Qf8#
        • 2.g5#
      • 1...Se6
        • 2.Rf7#
        • 2.Qe7#
      • 1...c5
        • 2.Sd5#
      • 1...Rxa1!
    • 1.Qb4?
      • threat
        • 2.Qe7#
        • 2.Qf8#
      • 1...Sxf3
        • 2.Qe7#
        • 2.Qf4#
      • 1...Bc4
        • 2.Qe7#
      • 1...Sf5
        • 2.Qf8#
        • 2.g5#
      • 1...Se6
        • 2.Rf7#
        • 2.Qe7#
      • 1...c5
        • 2.Sd5#
      • 1...Rxa1+!
  • Keys
    • 1.Rh7!
      • threat
        • 2.Sd7#
      • 1...Sxf3
        • 2.Qf4#
      • 1...Sc2
        • 2.Qf4#
      • 1...Se2
        • 2.Bxe5#
      • 1...Sb3
        • 2.Qf4#
      • 1...Sf5
        • 2.g5#
      • 1...Se6
        • 2.Rf7#
      • 1...c5
        • 2.Sd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(c);OGATE,P_PINS(F),P_SPINP(e)::QAR2(C)
    • S(c);OGATE,P_PINS(F),P_SPINP(e)::B(A),XP(e)
    • S(c);OGATE,P_PINS(F),P_SPINP(e),XS(B)::QAR2(C)
    • S(c);P_PINS(F),P_SPINP(e),SBLOCK::P(D)
    • S(c);P_PINS(F),P_SPINP(e),SBLOCK::R1(H)
    • P(f);N_GUARD::S(F)
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);P_PINS(F),P_SPINP(e),XS(B)::QAB1(C)
        • B(d);::QAB1(C)
        • P(f);N_GUARD::S(F)
      • Refutation
        • R(a);P_PINQ(C),XB(A)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • B(d);::QAB1(C)
        • P(f);N_GUARD::S(F)
      • Refutation
        • R(a);CHECK,XB(A)
  • Actual
    • R(H);
    • Threat
      • S(F)
    • Vars
      • S(c);OGATE,P_PINS(F),P_SPINP(e),XS(B)::QAR2(C)
      • S(c);OGATE,P_PINS(F),P_SPINP(e)::QAR2(C)
      • S(c);OGATE,P_PINS(F),P_SPINP(e)::B(A),XP(e)
      • S(c);P_PINS(F),P_SPINP(e),SBLOCK::P(D)
      • S(c);P_PINS(F),P_SPINP(e),SBLOCK::R1(H)
      • P(f);N_GUARD::S(F)
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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).