MESON Chess Problem Database

Problem Display
PID: 226410 (8/q1pB3K/N1P5/2pk2b1/R2P4/5r1n/6QB/3nR2b w - - 0 1)

Barbaro, D

Il Due Mosse, 1952

8/q1pB3K/N1P5/2pk2b1/R2P4/5r1n/6QB/3nR2b

#2

9 + 9

15148 Sadier Collection 2020
3713 Snap 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qa8
      • 2.Sxc7#
    • 1...Bf6
      • 2.Qg8#
  • Tries
    • 1.Qa2+?
      • 1...c4
        • 2.Qxc4#
      • 1...Rb3!
    • 1.Qxg5+?
      • 1...Rf5
        • 2.Qxf5#
      • 1...Sxg5+!
  • Keys
    • 1.dxc5!
      • threat
        • 2.Re5#
      • 1...Qxc5
        • 2.Sxc7#
      • 1...Be3
        • 2.Qa2#
      • 1...Bf4
        • 2.Qg8#
      • 1...Bf6
        • 2.Qg8#
      • 1...Se3
        • 2.Qd2#
      • 1...Sf4
        • 2.Qxg5#

This anticipates 56105(1994)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • Q(h);N_GUARD::S(F),XP(i)
    • B(g);OGATE::QAB(B)
  • Tries
    • Try
      • Q(B);CHECK,N_PINR(c)
      • Vars
        • P(e);P_SPINP(e)::QAB1(B),XP(e)
      • Refutation
        • R(c);P_SPINR(c)
    • Try
      • Q(B);CHECK,N_PINR(c),XB(g)
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAR2(B),XR(c)
      • Refutation
        • S(d);CHECK,XQ(B)
  • Actual
    • P(E);XP(e)
    • Threat
      • R1(A)
    • Vars
      • Q(h);N_GUARD,SBLOCK,XP(E)::S(F),XP(i)
      • B(g);::QAB(B)
      • B(g);OGATE::QAB(B)
      • S(a);S_CUTB(g)::QAR(B)
      • S(d);N_GUARD::QAR(B),XB(g)
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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).