MESON Chess Problem Database

Problem Display
PID: 170901 (8/4b3/6q1/2pBp1P1/p3Q1P1/k2N1PR1/N1K2B2/8 w - - 0 1)

Piatesi, Antonio

1st Comm., Problemisten, 1973

8/4b3/6q1/2pBp1P1/p3Q1P1/k2N1PR1/N1K2B2/8

#2

10 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bxg5
      • 2.Bxc5#
    • 1...Bf6
      • 2.Bxc5#
    • 1...Bd8
      • 2.Bxc5#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Sb1#
        • 2.Sb5#
        • 2.Qxa4#
      • 1...Qxe4
        • 2.Sb1#
        • 2.Sb5#
      • 1...Qe8
        • 2.Sb1#
      • 1...Qa6
        • 2.Sb1#
      • 1...Qb6
        • 2.Qxa4#
      • 1...Qc6
        • 2.Sb1#
      • 1...c4!
    • 1.Qe3?
      • threat
        • 2.Qc1#
      • 1...Qxd3+
        • 2.Qxd3#
      • 1...Qxg5
        • 2.Sf4#
      • 1...Bxg5
        • 2.Qxc5#
      • 1...Qb6
        • 2.Sdb4#
      • 1...c4!
    • 1.Qc4?
      • threat
        • 2.Qc3#
      • 1...Qxd3+
        • 2.Qxd3#
      • 1...Qb6!
  • Keys
    • 1.Sxc5!
      • threat
        • 2.f4#
      • 1...Qxe4+
        • 2.fxe4#
      • 1...Bxc5
        • 2.Bxc5#
      • 1...Qa6
        • 2.Qb4#
      • 1...Qb6
        • 2.Qxa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • B(f);N_GUARD,XP(J)::B(C),XP(c)
    • B(f);N_GUARD::B(C),XP(c)
  • Tries
    • Try
      • S(A);
      • Threat
        • DUALS(3)
      • Vars
        • Q(e);::S(A)
        • Q(e);::QAR1(G),XP(b)
      • Refutation
        • P(c);
    • Try
      • Q(G);P_SPINS(D)
      • Threat
        • QAB(G)
      • Vars
        • Q(e);CHECK,OGATE,P_SPINQ(e),XS(D)::QAR(G),XQ(e)
        • Q(e);N_PINS(D),XP(J)::QAR(G)+S(D)
        • B(f);N_GUARD,XP(J)::QAB(G),XP(c)
        • Q(e);N_PINS(D)::QAR(G)+S(D)
      • Refutation
        • P(c);
    • Try
      • Q(G);P_SPINS(D)
      • Threat
        • QAR2(G)
      • Vars
        • Q(e);CHECK,OGATE,XS(D)::QAR(G),XQ(e)
      • Refutation
        • Q(e);N_PINS(D)
  • Actual
    • S(D);P_SPINQ(G),XP(c)
    • Threat
      • R(F)+P(E)
    • Vars
      • Q(e);CHECK,OGATE,XQ(G)::R(F)+P(E),XQ(e)
      • B(f);OGATE,XS(D)::B(C),XB(f)
      • Q(e);N_PINQ(G)::QAB1(G)
      • Q(e);N_PINQ(G)::QAR1(G),XP(b)
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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).