MESON Chess Problem Database

Problem Display
PID: 204344 (b2K4/2pR1p2/2p1kp2/1p1qN3/NrnQ2P1/1B1R2B1/8/6b1 w - - 0 1)

Hertmann, Sandor

L'Alfiere di Re, 1925

b2K4/2pR1p2/2p1kp2/1p1qN3/NrnQ2P1/1B1R2B1/8/6b1

#2

9 + 11

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qh1
      • 2.Sc5#
      • 2.Re7#
    • 1...Qg2
      • 2.Sc5#
      • 2.Re7#
    • 1...Qf3
      • 2.Sc5#
      • 2.Re7#
    • 1...Qe4
      • 2.Sc5#
      • 2.Re7#
    • 1...Qc5
      • 2.Sxc5#
    • 1...Qxe5
      • 2.Re7#
    • 1...Qxd7+
      • 2.Qxd7#
    • 1...Sb2
      • 2.Sc5#
    • 1...Sd2
      • 2.Sc5#
    • 1...Sa3
      • 2.Sc5#
    • 1...Se3
      • 2.Sc5#
    • 1...Sa5
      • 2.Sc5#
    • 1...Sxe5
      • 2.Sc5#
    • 1...Sb6
      • 2.Sc5#
    • 1...Sd6
      • 2.Sc5#
      • 2.Re7#
  • Keys
    • 1.Qe4!
      • threat
        • 2.Qf5#
      • 1...Qxd7+
        • 2.Sxd7#
      • 1...Qxe4
        • 2.Re7#
      • 1...Qxd3
        • 2.Sxd3#
      • 1...Qxe5
        • 2.Re7#
      • 1...f5
        • 2.Qxf5#
      • 1...Se3
        • 2.Sc5#
      • 1...Sd6
        • 2.Re7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • Q(e);N_GUARD,N_PINR(H),P_SPINS(c)::S(D),XQ(e)
    • Q(e);N_PINR(H),P_SPINS(c),XS(G)::R1(H)
    • Q(e);CHECK,OGATE,P_SPINS(c),XR(H)::QAB1(E),XQ(e)
    • S(c);P_SPINQ(e)::S(D)
    • S(c);P_SPINQ(e),XS(G)::S(D)
  • Actual
    • Q(E);
    • Threat
      • QAB1(E)
    • Vars
      • Q(e);CHECK,P_SPINS(c),XR(H)::QAR(E)+S(G),XQ(e)
      • Q(e);N_PINR(H),P_SPINS(c),XQ(E)::R1(H)
      • Q(e);P_SPINS(c),XR(B)::QAR(E)+S(G),XQ(e)
      • Q(e);N_PINR(H),P_SPINQ(e),P_SPINS(c),XS(G)::R1(H)
      • P(h);::QAB1(E),XP(h)
      • S(c);P_SPINQ(e),S_CUTB(a)::S(D)
      • S(c);N_PINR(H),P_SPINQ(e),SBLOCK::R1(H)
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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).