MESON Chess Problem Database

Problem Display
PID: 91389 (4Q3/8/3ppp2/1P2k3/5b2/2P1NK2/n7/4R3 w - - 0 1)

Einat, Paz

Probleemblad, 1975

4Q3/8/3ppp2/1P2k3/5b2/2P1NK2/n7/4R3

#2

6 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...d5
      • 2.Qb8#
    • 1...f5
      • 2.Qh8#
  • Tries
    • 1.Sc4+?
      • 1...Kd5
        • 2.Qc6#
      • 1...Kf5!
    • 1.Sg4+?
      • 1...Kd5
        • 2.Qc6#
      • 1...Kf5!
    • 1.Qh5+?
      • 1...f5
        • 2.Qh8#
      • 1...Bg5!
    • 1.Qg6?
      • threat
        • 2.Qe4#
      • 1...d5
        • 2.Sc4#
      • 1...f5
        • 2.Qg7#
      • 1...Sxc3!
    • 1.Qa8?
      • threat
        • 2.Qe4#
      • 1...d5
        • 2.Qb8#
      • 1...f5
        • 2.Sg4#
        • 2.Qh8#
      • 1...Sxc3!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Qe4#
      • 1...Sxc3
        • 2.Qxc3#
      • 1...f5
        • 2.Sg4#
      • 1...d5
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(d);OGATEB::QAB(F)
    • P(f);OGATEB::QAB(F)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(c);N_SPINP(e),P-FLIGHT::QAB1(F)
      • Refutation
        • K(c);N_SPINP(e),P-FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • K(c);N_SPINP(e),P-FLIGHT::QAB1(F)
      • Refutation
        • K(c);N_SPINP(e),P-FLIGHT
    • Try
      • Q(F);CHECK,N_PINP(e)
      • Vars
        • P(f);OGATEB,P_SPINP(f)::QAB(F)
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • Q(F);N_PINP(e)
      • Threat
        • QAR1(F)
      • Vars
        • P(d);SBLOCK::R(A)+S(C),DCHECK
        • P(f);OGATEB::QAB(F)
      • Refutation
        • S(a);XP(B)
    • Try
      • Q(F);N_PINP(e)
      • Threat
        • QAR1(F)
      • Vars
        • P(d);OGATEB::QAB(F)
      • Refutation
        • S(a);XP(B)
  • Actual
    • Q(F);N_PINP(e)
    • Threat
      • QAR1(F)
    • Vars
      • S(a);OGATE,XP(B)::QAB(F),XS(a)
      • P(f);SBLOCK::R(A)+S(C),DCHECK
      • P(d);OGATEB::QAB(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).