MESON Chess Problem Database

Problem Display
PID: 121451 (K1Nb4/2p2p1n/4pk1B/7p/4Q3/3PN3/p7/r7 w - - 0 1)

Chocolous, Jiri

Casopis ceskoslovenskych sachistu, 1918

K1Nb4/2p2p1n/4pk1B/7p/4Q3/3PN3/p7/r7

#2

6 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...h4
      • 2.Sg4#
    • 1...e5
      • 2.Qf5#
      • 2.Qc6#
  • Tries
    • 1.Qf3+?
      • 1...Ke5
        • 2.Qf4#
      • 1...Kg6!
    • 1.Qd4+?
      • 1...Kg6
        • 2.Qg7#
      • 1...e5!
    • 1.Qg4?
      • threat
        • 2.Bg7#
        • 2.Qg7#
      • 1...Ke5
        • 2.Qf4#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Rg1
        • 2.Bg7#
      • 1...e5
        • 2.Sd5#
        • 2.Bg7#
        • 2.Qf5#
      • 1...hxg4!
    • 1.Qh4+?
      • 1...Ke5
        • 2.Qf4#
        • 2.d4#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Kg6!
    • 1.Qe5+?
      • 1...Kg6
        • 2.Qg7#
      • 1...Kxe5!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Bg7#
        • 2.Qg7#
      • 1...Ke5
        • 2.Qb2#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Rg1
        • 2.Bg7#
      • 1...e5
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(c);N_GUARD::S(B)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(e);S_FLIGHT::QAB1(C)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(e);OGATE,P-FLIGHT::QAR1(C)
      • Refutation
        • P(d);P_SPINP(d)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(e);S_FLIGHT::QAB1(C)
        • S(h);N_GUARD::QAB1(C),XS(h)
        • R(a);::B(D)
      • Refutation
        • P(c);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • S(h);N_GUARD,P_SPINS(h)::QAB1(C),XS(h)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(e);OGATE,P-FLIGHT::QAR1(C)
      • Refutation
        • K(e);S_FLIGHT,XQ(C)
  • Actual
    • Q(C);
    • Threat
      • DUALS(2)
    • Vars
      • K(e);S_FLIGHT::QAB(C)
      • S(h);N_GUARD::QAB1(C),XS(h)
      • R(a);::B(D)
      • P(d);OGATEB,SBLOCK::QAR(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).