MESON Chess Problem Database

Problem Display
PID: 70908 (1Bb5/3p1Q2/r5PK/rn1N4/2PPkpp1/1NR2p1p/4n2q/8 w - - 0 1)

Peris Pardo, Julio

Arbejder-Skak, 1953

1Bb5/3p1Q2/r5PK/rn1N4/2PPkpp1/1NR2p1p/4n2q/8

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg6+
      • 2.Qxg6#
    • 1...Sg3
      • 2.Qxf4#
    • 1...Sexd4
      • 2.Sc5#
    • 1...Sbxd4
      • 2.Sd2#
  • Tries
    • 1.Sf6+?
      • 1...Rxf6
        • 2.Qd5#
      • 1...Kf5!
    • 1.Qe8+?
      • 1...Kf5
        • 2.Qe5#
      • 1...Re6!
    • 1.Qe7+?
      • 1...Kf5
        • 2.Qe5#
      • 1...Re6!
  • Keys
    • 1.Kg5!
      • threat
        • 2.Qf5#
      • 1...Rxg6+
        • 2.Qxg6#
      • 1...Sexd4
        • 2.Sc5#
      • 1...Sbxd4
        • 2.Sd2#
      • 1...Rf6
        • 2.Sxf6#
      • 1...Sg3
        • 2.Qxf4#
      • 1...Sd6
        • 2.Qe7#
      • 1...d6
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(j);CHECK,OGATE,XP(F)::QAB(H),XR(j)
    • S(a);N_GUARD,S_CUTQ(b)::QAR1(H),XP(f)
    • S(a);SBLOCK,XP(D)::S(A)
    • S(i);SBLOCK,XP(D)::S(A)
  • Tries
    • Try
      • S(E);CHECK,N_SPINP(F)
      • Vars
        • R(j);P_PINP(F),XS(E)::QAB1(H)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • K(e);S_FLIGHT::QAR1(H)
      • Refutation
        • R(j);P_SPINR(j)
    • Try
      • Q(H);CHECK
      • Vars
        • K(e);S_FLIGHT::QAR1(H)
      • Refutation
        • R(j);P_SPINR(j)
  • Actual
    • K(G);N_SPINP(F),S_FLIGHT
    • Threat
      • QAB1(H)
    • Vars
      • R(j);CHECK,OGATE,XP(F)::QAB(H),XR(j)
      • S(a);SBLOCK,XP(D)::S(A)
      • S(i);P_PINS(E),SBLOCK,XP(D)::S(A)
      • R(j);N_GUARD::S(E),XR(j)
      • S(a);N_GUARD,S_CUTQ(b)::QAR1(H),XP(f)
      • S(i);P_PINS(E),S_CUTR(j)::QAR(H)
      • P(k);S_CUTR(j)::S(E)
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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).