MESON Chess Problem Database

Problem Display
PID: 70898 (8/1Rp1nK2/P1k1N3/3R4/P1b2PBb/B3n3/8/2Q3q1 w - - 0 1)

Peris Pardo, Julio

2nd HM., L'Italia Scacchistica, 1949

8/1Rp1nK2/P1k1N3/3R4/P1b2PBb/B3n3/8/2Q3q1

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd5
      • 2.Bf3#
    • 1...S3xd5
      • 2.Sd8#
    • 1...S7xd5
      • 2.Sd4#
  • Tries
    • 1.Rc5+?
      • 1...Kd7
        • 2.Rcxc7#
      • 1...Kd6!
    • 1.Rbb5?
      • threat
        • 2.Sd4#
        • 2.Sd8#
      • 1...Sxg4
        • 2.Sd8#
      • 1...S3xd5
        • 2.Sd8#
      • 1...S7xd5
        • 2.Sd4#
      • 1...Qd1
        • 2.Sd8#
      • 1...Bf6
        • 2.Sd8#
      • 1...Sd1
        • 2.Sd8#
      • 1...Sf1
        • 2.Sd8#
      • 1...Sc2
        • 2.Sd8#
      • 1...Sg2
        • 2.Sd8#
      • 1...S3f5
        • 2.Sd8#
      • 1...Sg6
        • 2.Sd4#
      • 1...Sc8
        • 2.Sd4#
      • 1...Sg8
        • 2.Sd4#
      • 1...S7f5!
    • 1.Rb6+?
      • 1...Kxd5
        • 2.Bf3#
      • 1...cxb6
        • 2.Rd6#
      • 1...Kxb6!
    • 1.Rxc7+?
      • 1...Kxd5
        • 2.Bf3#
      • 1...Kb6!
  • Keys
    • 1.Rdb5!
      • threat
        • 2.Rxc7#
      • 1...Kd7
        • 2.Rxc7#
      • 1...S3d5
        • 2.Sd8#
      • 1...S7d5
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(e);N_SPINB(c),OGATEB,S_FLIGHT,XR(F)::B(E)
    • S(b);SBLOCK,XR(F)::S(H)
    • S(g);SBLOCK,XR(F)::S(H)
  • Tries
    • Try
      • R(F);CHECK,N_PINB(c),P_SPINS(H)
      • Vars
        • K(e);OGATE,P_SPINP(f),S_FLIGHT::R1(F),XP(f)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • R(I);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);XB(E)::S(H)
        • S(b);XR(F)::S(H)
        • S(g);XR(F)::S(H)
        • Q(a);::S(H)
        • B(d);::S(H)
        • S(b);::S(H)
        • S(b);N_SPINB(c)::S(H)
        • S(g);::S(H)
      • Refutation
        • S(g);
    • Try
      • R(I);CHECK
      • Vars
        • K(e);N_SPINB(c),S_FLIGHT,XR(F)::B(E)
        • P(f);SBLOCK,XR(I)::R1(F)
      • Refutation
        • K(e);N_SPINB(c),P-FLIGHT,XR(I)
    • Try
      • R(I);CHECK,XP(f)
      • Vars
        • K(e);N_SPINB(c),S_FLIGHT,XR(F)::B(E)
      • Refutation
        • K(e);N_SPINB(c),P-FLIGHT
  • Actual
    • R(F);P_SPINS(H)
    • Threat
      • R1(I),XP(f)
    • Vars
      • K(e);N_SPINB(c),P_SPINP(f),S_FLIGHT::R1(I),XP(f)
      • S(b);N_PINS(H)::S(H)
      • S(g);N_PINS(H)::S(H)
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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).