MESON Chess Problem Database

Problem Display
PID: 207015 (8/4K2p/4N3/3pk2n/6nr/3P3B/8/5Q2 w - - 0 1)

Pap, Dezso

Vasarnapi Ujsag, 1861

8/4K2p/4N3/3pk2n/6nr/3P3B/8/5Q2

#2

5 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sh2
      • 2.Qf5#
    • 1...Sgf6
      • 2.Qf5#
    • 1...Sg3
      • 2.Qf4#
    • 1...Sf4
      • 2.Qxf4#
    • 1...Shf6
      • 2.Qf4#
    • 1...Sg7
      • 2.Qf4#
  • Tries
    • 1.Bxg4?
      • threat
        • 2.Qe2#
        • 2.Qe1#
        • 2.Qf5#
      • 1...d4
        • 2.Qf5#
      • 1...Rh1
        • 2.Qe2#
        • 2.Qf5#
      • 1...Rh2
        • 2.Qf5#
      • 1...Rh3
        • 2.Qf5#
      • 1...Sg3
        • 2.Qf4#
        • 2.Qf6#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Sf6
        • 2.Qf4#
        • 2.Qf5#
        • 2.Qxf6#
      • 1...Sg7
        • 2.Qe2#
        • 2.Qe1#
        • 2.Qf4#
        • 2.Qf6#
      • 1...Rxg4!
    • 1.Qa1+?
      • 1...d4
        • 2.Qa5#
      • 1...Kf5!
    • 1.Qc1?
      • threat
        • 2.Qg5#
      • 1...Kf5
        • 2.Qg5#
      • 1...Se3
        • 2.Qc7#
      • 1...Sh6
        • 2.Qc7#
      • 1...Sg3
        • 2.Qf4#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Sg7
        • 2.Qf4#
      • 1...h6!
  • Keys
    • 1.Qb1!
      • threat
        • 2.d4#
      • 1...Kf5
        • 2.d4#
      • 1...d4
        • 2.Qb5#
      • 1...Sf2
        • 2.Qb8#
      • 1...Sh2
        • 2.Qb8#
      • 1...Se3
        • 2.Qb8#
      • 1...Sgf6
        • 2.Qb8#
      • 1...Sh6
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • S(a);::QAR1(A)
    • S(e);N_GUARD::QAB1(A)
    • S(e);N_GUARD::QAB1(A),XS(e)
  • Tries
    • Try
      • B(C);XS(a)
      • Threat
        • DUALS(3)
      • Vars
        • P(c);::QAR1(A)
        • R(b);::QAR1(A)
        • S(e);N_GUARD::QAB1(A),XS(e)
      • Refutation
        • R(b);XB(C)
    • Try
      • Q(A);CHECK
      • Vars
        • P(c);OGATEB,P_SPINP(c)::QAR(A)
      • Refutation
        • K(d);P-FLIGHT,P_SPINS(a)
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • K(d);P-FLIGHT,P_SPINS(a)::QAR1(A)
        • S(a);::QAB(A)
        • S(e);N_GUARD::QAB1(A)
        • S(e);N_GUARD::QAB1(A),XS(e)
      • Refutation
        • P(f);
  • Actual
    • Q(A);
    • Threat
      • P(B)
    • Vars
      • K(d);P-FLIGHT,P_SPINS(a)::QAB(A)+P(B)
      • P(c);OGATEB::QAR(A)
      • S(a);::QAB(A)
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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).