MESON Chess Problem Database

Problem Display
PID: 238933 (4n2B/3N1pr1/1n1p1r2/p1Np3R/3kp2R/1PpBp3/4P3/K1Q5 w - - 0 1)

Petite, Efren

Revista Romana de Sah, 1982

4n2B/3N1pr1/1n1p1r2/p1Np3R/3kp2R/1PpBp3/4P3/K1Q5

#2

10 + 12

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...c2
      • 2.Qb2#
  • Tries
    • 1.Sxe4?
      • threat
        • 2.Qxc3#
      • 1...dxe4
        • 2.Rxe4#
      • 1...Rf1
        • 2.Sf2#
      • 1...Rg1
        • 2.Sg3#
      • 1...c2
        • 2.Qb2#
      • 1...Sa4!
    • 1.Rxd5+?
      • 1...Sxd5
        • 2.Rxe4#
      • 1...Kxd5!
  • Keys
    • 1.Bxe4!
      • threat
        • 2.Qd1#
      • 1...Sxd7
        • 2.Rxd5#
      • 1...c2
        • 2.Qb2#
      • 1...Rf1
        • 2.Bf3#
      • 1...Rg1
        • 2.Bg2#
      • 1...Sc4
        • 2.Rxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATEB::QAB(B)
  • Tries
    • Try
      • S(G);XP(d)
      • Threat
        • QAB1(B),XP(a)
      • Vars
        • P(f);OGATE,P_SPINP(f),XS(G)::R1(F),XP(f)
        • R(i);N_GUARD,P_PINQ(B),P_SPINR(k)::R(F)+S(G)
        • R(k);N_GUARD,P_PINQ(B),P_SPINR(i)::R(F)+S(G)
        • P(a);OGATEB::QAB(B)
      • Refutation
        • S(g);
    • Try
      • R(H);CHECK,XP(f)
      • Vars
        • S(g);SBLOCK,XR(H)::R1(F),XP(d)
      • Refutation
        • K(c);N_SPINP(d),P-FLIGHT,XR(H)
  • Actual
    • B(E);XP(d)
    • Threat
      • QAR(B)
    • Vars
      • S(g);N_GUARD,XS(I)::R1(H),XP(f)
      • P(a);OGATEB::QAB(B)
      • R(i);N_GUARD,P_PINQ(B),P_SPINR(k)::R(F)+B(E)
      • R(k);N_GUARD,P_PINQ(B),P_SPINR(i)::R(F)+B(E)
      • S(g);N_GUARD::R1(H),XP(f)
HTML5 logo

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).