MESON Chess Problem Database

Problem Display
PID: 110789 (2K3nB/4p2R/p2Nk2p/P1P1P2p/1n2Q2P/8/8/8 w - - 0 1)

Caresmel, Andre

1st Prize, Themes-64, 1963

2K3nB/4p2R/p2Nk2p/P1P1P2p/1n2Q2P/8/8/8

#2

9 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sa2
      • 2.Qc4#
    • 1...Sc2
      • 2.Qc4#
    • 1...Sd3
      • 2.Qc4#
    • 1...Sd5
      • 2.Qf5#
    • 1...Sc6
      • 2.Qc4#
    • 1...Sf6
      • 2.exf6#
    • 1...exd6
      • 2.exd6#
  • Tries
    • 1.Kc7?
      • 1...exd6
        • 2.exd6#
      • 1...Sa2
        • 2.Qc4#
      • 1...Sc2
        • 2.Qc4#
      • 1...Sd3
        • 2.Qc4#
      • 1...Sc6
        • 2.Qc4#
      • 1...Sf6
        • 2.exf6#
      • 1...Sd5+!
    • 1.Kd8?
      • 1...exd6
        • 2.exd6#
      • 1...Sa2
        • 2.Qc4#
      • 1...Sc2
        • 2.Qc4#
      • 1...Sd3
        • 2.Qc4#
      • 1...Sd5
        • 2.Qf5#
      • 1...Sf6
        • 2.Rxe7#
        • 2.exf6#
      • 1...Sc6+!
    • 1.Sb5?
      • threat
        • 2.Sd4#
        • 2.Sc7#
      • 1...Sc2
        • 2.Sc7#
      • 1...Sd5
        • 2.Sd4#
      • 1...Sc6
        • 2.Sc7#
      • 1...axb5!
    • 1.Bg7?
      • 1...Sc6
        • 2.Qc4#
      • 1...Sa2
        • 2.Qc4#
      • 1...Sc2
        • 2.Qc4#
      • 1...Sd3
        • 2.Qc4#
      • 1...Sd5
        • 2.Qf5#
      • 1...Sf6
        • 2.exf6#
      • 1...exd6!
    • 1.Rxh6+?
      • 1...Sf6
        • 2.exf6#
      • 1...Sxh6!
    • 1.Rf7?
      • 1...Sc6
        • 2.Qc4#
      • 1...Sa2
        • 2.Qc4#
      • 1...Sc2
        • 2.Qc4#
      • 1...Sd3
        • 2.Qc4#
      • 1...Sd5
        • 2.Qf5#
      • 1...Sf6
        • 2.exf6#
      • 1...exd6!
  • Keys
    • 1.Qb7!
      • 1...exd6
        • 2.Qf7#
      • 1...Sc6
        • 2.Qb3#
      • 1...Sf6
        • 2.Rxe7#
      • 1...Sa2
        • 2.Qb3#
      • 1...Sc2
        • 2.Qb3#
      • 1...Sd3
        • 2.Qb3#
      • 1...Sd5
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 7
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB(A)
    • S(a);SBLOCK::QAB1(A)
    • S(g);OGATE::QAR(A)+P(E),XS(g)
    • P(f);OGATE,XS(F)::QAR(A)+P(E),XP(f)
  • Tries
    • Try
      • K(H);P-FLIGHT
      • Vars
        • P(f);OGATE,XS(F)::QAR(A)+P(E),XP(f)
        • S(a);N_GUARD::QAB(A)
        • S(g);OGATE::QAR(A)+P(E),XS(g)
      • Refutation
        • S(a);CHECK
    • Try
      • K(H);P-FLIGHT
      • Vars
        • P(f);OGATE,XS(F)::QAR(A)+P(E),XP(f)
        • S(a);N_GUARD::QAB(A)
        • S(a);SBLOCK::QAB1(A)
      • Refutation
        • S(a);CHECK
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::S(F)
      • Refutation
        • P(c);XS(F)
    • Try
      • B(I);
      • Vars
        • S(a);N_GUARD::QAB(A)
        • S(a);SBLOCK::QAB1(A)
        • S(g);OGATE::QAR(A)+P(E),XS(g)
      • Refutation
        • P(f);XS(F)
    • Try
      • R(G);CHECK,XP(e)
      • Vars
        • S(g);OGATE,P_SPINS(g)::QAR(A)+P(E),XS(g)
      • Refutation
        • S(g);XR(G)
    • Try
      • R(G);
      • Vars
        • S(a);N_GUARD::QAB(A)
        • S(a);SBLOCK::QAB1(A)
        • S(g);OGATE::QAR(A)+P(E),XS(g)
      • Refutation
        • P(f);XS(F)
  • Actual
    • Q(A);
    • Vars
      • P(f);OGATE,XS(F)::QAB1(A)
      • S(a);OGATE::QAB(A)
      • S(g);N_GUARD::R1(G),XP(f)
      • S(a);SBLOCK::QAB1(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).