MESON Chess Problem Database

Problem Display
PID: 168482 (4NK2/2NQ1p2/1qn5/2p1kp2/1bR3R1/3r1n2/2Br2b1/6B1 w - - 0 1)

Petite, Efren

3rd Prize, Problemas TT, 1953

4NK2/2NQ1p2/1qn5/2p1kp2/1bR3R1/3r1n2/2Br2b1/6B1

#2

8 + 11

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.Qxf5#
    • 1...Rb3
      • 2.Qxf5#
    • 1...Rc3
      • 2.Qxf5#
    • 1...Re3
      • 2.Qxf5#
    • 1...Rd4
      • 2.Qxf5#
    • 1...Rd5
      • 2.Qxf5#
    • 1...Rd6
      • 2.Qxf5#
    • 1...Sfd4
      • 2.Qd6#
    • 1...Scd4
      • 2.Qd5#
    • 1...f6
      • 2.Qe6#
  • Tries
    • 1.Bh2+?
      • 1...f4
        • 2.Bxf4#
      • 1...Sxh2!
    • 1.Bd4+?
      • 1...Rxd4
        • 2.Qxf5#
      • 1...Sfxd4
        • 2.Qd6#
      • 1...Scxd4
        • 2.Qd5#
      • 1...cxd4+!
  • Keys
    • 1.Be3!
      • threat
        • 2.Bf4#
      • 1...Rxe3
        • 2.Qxf5#
      • 1...Rd4
        • 2.Qxf5#
      • 1...Sfd4
        • 2.Qd6#
      • 1...Scd4
        • 2.Qd5#
      • 1...f4
        • 2.Bxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • R(c);::QAR1(F),XP(h)
    • S(d);S_CUTR(c)::QAB1(F)
    • S(j);S_CUTR(c)::QAR1(F)
    • P(k);N_GUARD::QAR1(F)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • P(h);P_SPINP(h)::B(A),XP(h)
      • Refutation
        • S(d);XB(A)
    • Try
      • B(A);CHECK
      • Vars
        • R(c);XB(A)::QAR1(F),XP(h)
        • S(d);XB(A)::QAB1(F)
        • S(j);XB(A)::QAR1(F)
      • Refutation
        • P(f);CHECK,XB(A)
  • Actual
    • B(A);
    • Threat
      • B(A)
    • Vars
      • R(c);XB(A)::QAR1(F),XP(h)
      • R(c);::QAR1(F),XP(h)
      • S(d);S_CUTR(c)::QAB1(F)
      • S(j);S_CUTR(c)::QAR1(F)
      • P(h);::B(A),XP(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).