MESON Chess Problem Database

Problem Display
PID: 164929 (5BB1/2p3p1/7q/2P1pp1p/1kP5/R7/K2PQ3/8 w - - 0 1)

Sardella, Giuseppe

3rd Prize, Best Problems, 2016

5BB1/2p3p1/7q/2P1pp1p/1kP5/R7/K2PQ3/8

#2

8 + 7

5454 Near Snap 2017
4901 Best Problems 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd2+
      • 2.Qxd2#
    • 1...Qf4
      • 2.c6#
    • 1...Qa6
      • 2.c6#
    • 1...Qh7
      • 2.c6#
    • 1...Qh8
      • 2.c6#
  • Tries
    • 1.Qd1?
      • threat
        • 2.Ra4#
        • 2.Qb3#
        • 2.Qa4#
        • 2.Qb1#
      • 1...Qxd2+
        • 2.Qxd2#
      • 1...Qe6
        • 2.Ra4#
        • 2.Qb3#
        • 2.Qa4#
      • 1...Qe3
        • 2.Ra4#
        • 2.Qa4#
      • 1...Qa6
        • 2.Qb3#
        • 2.Qb1#
        • 2.c6#
      • 1...Qc6
        • 2.Qb3#
        • 2.Qb1#
      • 1...Qd6!
    • 1.d3?
      • threat
        • 2.Qb2#
      • 1...Qd2+
        • 2.Qxd2#
      • 1...Qc1
        • 2.c6#
      • 1...Qd6!
    • 1.d4?
      • threat
        • 2.Qb2#
      • 1...Qd2+
        • 2.Qxd2#
      • 1...Qe3
        • 2.c6#
      • 1...Qc1
        • 2.c6#
      • 1...Qe6!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Qb1#
      • 1...Qxd2+
        • 2.Qxd2#
      • 1...Qd6
        • 2.d4#
      • 1...Qe6
        • 2.d3#
      • 1...Qe3
        • 2.dxe3#

Anticipated by 10806(1968-1969)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(e);CHECK,OGATE,XP(B)::QAB(C),XQ(e)
    • Q(e);N_GUARD::B(G)+P(F)
    • Q(e);N_GUARD,P_PINR(D)::B(G)+P(F)
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(4)
      • Vars
        • Q(e);CHECK,OGATE,XP(B)::QAB(C),XQ(e)
      • Refutation
        • Q(e);
    • Try
      • P(B);
      • Threat
        • QAR2(C)
      • Vars
        • Q(e);CHECK,N_GUARD::QAB(C),XQ(e)
        • Q(e);N_GUARD::B(G)+P(F)
      • Refutation
        • Q(e);
    • Try
      • P(B);
      • Threat
        • QAR2(C)
      • Vars
        • Q(e);CHECK,N_GUARD::QAB(C),XQ(e)
        • Q(e);N_GUARD::B(G)+P(F)
      • Refutation
        • Q(e);P_PINP(E)
  • Actual
    • Q(C);
    • Threat
      • QAR(C)
    • Vars
      • Q(e);CHECK,OGATE,P_SPINQ(e),XP(B)::QAB(C),XQ(e)
      • Q(e);N_GUARD::QAB(C)+P(B)
      • Q(e);N_GUARD,P_PINP(E)::QAB(C)+P(B)
      • Q(e);OGATE::QAB(C)+P(B),XQ(e)
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).