MESON Chess Problem Database

Problem Display
PID: 196735 (2qN1b1r/P4Rpp/1p1kPB1R/6p1/1PP1Qnn1/3r4/p2P4/K7 w - - 0 1)

Novejarque Iranzo, Francisco

4th Prize, Spanish National Ty., 1919

2qN1b1r/P4Rpp/1p1kPB1R/6p1/1PP1Qnn1/3r4/p2P4/K7

#2

11 + 12

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qa6
      • 2.Rd7#
      • 2.Qc6#
    • 1...Qxe6
      • 2.Sb7#
      • 2.Qc6#
    • 1...Qb7
      • 2.Sxb7#
    • 1...Qd7
      • 2.Rxd7#
    • 1...Qxc4
      • 2.Sb7#
      • 2.Rd7#
    • 1...Qc5
      • 2.Sb7#
      • 2.Rd7#
    • 1...Qc6
      • 2.Qxc6#
    • 1...Qa8
      • 2.Rd7#
    • 1...Qb8
      • 2.Rd7#
      • 2.Qc6#
      • 2.axb8Q#
      • 2.axb8B#
    • 1...Sg2
      • 2.Qxd3#
    • 1...Sh3
      • 2.Qxd3#
    • 1...Sh5
      • 2.Qxd3#
    • 1...Sg6
      • 2.Qxd3#
    • 1...Sf2
      • 2.Be5#
      • 2.Qe5#
    • 1...Sh2
      • 2.Be5#
      • 2.Qe5#
    • 1...Se3
      • 2.Be5#
      • 2.Qe5#
    • 1...Se5
      • 2.Bxe5#
      • 2.Qxe5#
    • 1...Sxh6
      • 2.Be5#
      • 2.Qe5#
  • Tries
    • 1.Be7+?
      • 1...Kc7
        • 2.Qc6#
      • 1...Bxe7!
    • 1.Qxd3+?
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sxd3!
    • 1.Qxf4+?
      • 1...Se5
        • 2.Bxe5#
        • 2.Qxe5#
      • 1...gxf4!
    • 1.c5+?
      • 1...Qxc5
        • 2.Sb7#
        • 2.Rd7#
      • 1...bxc5!
  • Keys
    • 1.e7!
      • threat
        • 2.e8S#
      • 1...Kc7
        • 2.Qc6#
        • 2.e8S#
      • 1...Kd7
        • 2.exf8Q#
        • 2.exf8B#
      • 1...Qxd8
        • 2.exd8Q#
        • 2.exd8R#
      • 1...Bxe7
        • 2.Qxe7#
      • 1...Qe6
        • 2.Qc6#
      • 1...Qd7
        • 2.Be5#
      • 1...Qc6
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • Q(j);N_GUARD::S(K),XQ(j)
    • Q(j);N_GUARD::R1(J),XQ(j)
    • Q(j);N_GUARD::QAR1(E),XQ(j)
    • Q(j);N_GUARD::R1(J)
    • S(c);N_GUARD::QAR(E),XR(b)
  • Tries
    • Try
      • B(G);CHECK
      • Vars
        • K(g);S_FLIGHT::QAR1(E)
      • Refutation
        • B(k);XB(G)
    • Try
      • Q(E);CHECK,XR(b)
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAR1(E),XS(c)
      • Refutation
        • S(c);XQ(E)
    • Try
      • Q(E);CHECK,XS(c)
      • Refutation
        • P(e);XQ(E)
    • Try
      • P(D);CHECK
      • Refutation
        • P(f);XP(D)
  • Actual
    • P(F);
    • Threat
      • P=S
    • Vars
      • K(g);P-FLIGHT::PXB(k)=Q
      • Q(j);OGATE,XS(K)::PXQ(j)=Q
      • B(k);OGATE,XP(F)::QAB1(E),XB(k)
      • Q(j);N_GUARD::QAR1(E)
      • Q(j);SBLOCK::R(H)+B(G),DCHECK
      • Q(j);N_GUARD::QAR1(E),XQ(j)
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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).