MESON Chess Problem Database

Problem Display
PID: 103823 (8/4p3/4PP2/1N1Pkp1K/8/p3p3/P5Q1/7B w - - 0 1)

Vianello, L

Pasquin, 1899

8/4p3/4PP2/1N1Pkp1K/8/p3p3/P5Q1/7B

#2

8 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qh2#
    • 1...f4
      • 2.Qg5#
  • Tries
    • 1.Kg5?
      • 1...e2
        • 2.Qxe2#
      • 1...f4
        • 2.Qe4#
      • 1...exf6+!
    • 1.Qe4+?
      • 1...Kxf6
        • 2.Qd4#
      • 1...fxe4!
    • 1.Qb2+?
      • 1...Kf4
        • 2.Qh2#
      • 1...axb2!
    • 1.Qg3+?
      • 1...f4
        • 2.Qg5#
      • 1...Kxf6!
    • 1.Qg4?
      • threat
        • 2.Qd4#
      • 1...Kxf6
        • 2.Qd4#
      • 1...f4
        • 2.Qg5#
      • 1...fxg4!
    • 1.Qg5?
      • 1...exf6
        • 2.Qxe3#
      • 1...e2!
    • 1.Qg8?
      • 1...Kf4
        • 2.Qb8#
      • 1...Kxf6
        • 2.Qh8#
      • 1...exf6
        • 2.Qb8#
      • 1...f4
        • 2.Qg5#
      • 1...e2!
  • Keys
    • 1.Qg1!
      • 1...Kf4
        • 2.Qh2#
      • 1...Kxf6
        • 2.Qa1#
      • 1...exf6
        • 2.Qxe3#
      • 1...e2
        • 2.Qd4#
      • 1...f4
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::QAB(C)
    • P(d);OGATEB::QAR2(C)
  • Tries
    • Try
      • K(F);P-FLIGHT
      • Vars
        • P(b);OGATEB::QAR(C),XP(b)
        • P(d);N_GUARD::QAR1(C)
      • Refutation
        • P(e);CHECK,XP(H)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);S_FLIGHT,XP(H)::QAB(C)
      • Refutation
        • P(d);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB(C)
      • Refutation
        • P(a);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • P(d);OGATEB,P_SPINP(d)::QAR2(C)
      • Refutation
        • K(c);S_FLIGHT,XP(H)
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • K(c);S_FLIGHT,XP(H)::QAB(C)
        • P(d);OGATEB::QAR2(C)
      • Refutation
        • P(d);XQ(C)
    • Try
      • Q(C);P_PINP(d)
      • Vars
        • P(e);SBLOCK,XP(H)::QAR2(C),XP(b)
      • Refutation
        • P(b);
    • Try
      • Q(C);
      • Vars
        • K(c);S_FLIGHT::QAB(C)
        • K(c);OGATEB,S_FLIGHT,XP(H)::QAB(C)
        • P(e);SBLOCK,XP(H)::QAB(C)
        • P(d);OGATEB::QAR2(C)
      • Refutation
        • P(b);
  • Actual
    • Q(C);
    • Vars
      • K(c);S_FLIGHT::QAB(C)
      • K(c);S_FLIGHT,XP(H)::QAB(C)
      • P(e);SBLOCK,XP(H)::QAR2(C),XP(b)
      • P(b);OGATE::QAB1(C)
      • P(d);OGATEB::QAR2(C)
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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).