MESON Chess Problem Database

Problem Display
PID: 198708 (3r1N2/8/b4B2/r3pkP1/p2P1n1R/K3Qq2/2N5/1B3R2 w - - 0 1)

Ellerman, Arnoldo

L'Italia Scacchistica, 1921

3r1N2/8/b4B2/r3pkP1/p2P1n1R/K3Qq2/2N5/1B3R2

#2

10 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Qh3#
    • 1...Qxe3+
      • 2.Sxe3#
    • 1...Rxd4
      • 2.Sxd4#
    • 1...Sd3
      • 2.Qe4#
    • 1...exd4
      • 2.Sxd4#
  • Keys
    • 1.d5!
      • threat
        • 2.Sd4#
      • 1...Qxe3+
        • 2.Sxe3#
      • 1...Bd3
        • 2.Qxe5#
      • 1...Qe4
        • 2.Qh3#
      • 1...Sd3
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • Q(a);N_PINQ(E),P_SPINS(c),SBLOCK::QAB(E)
    • Q(a);CHECK,P_SPINS(c),XQ(E)::B(A)+S(C),DCHECK,XQ(a)
    • R(h);XP(F)::B(A)+S(C),DCHECK,XR(h)
    • S(c);N_PINQ(E),P_SPINQ(a)::QAB1(E)
    • P(e);XP(F)::B(A)+S(C),DCHECK,XP(e)
  • Actual
    • P(F);
    • Threat
      • B(A)+S(C),DCHECK
    • Vars
      • Q(a);CHECK,P_SPINS(c),XQ(E)::B(A)+S(C),DCHECK,XQ(a)
      • B(g);N_PINQ(E)::QAR1(E),XP(e)
      • Q(a);N_PINQ(E),P_SPINS(c),SBLOCK::QAB(E)
      • S(c);N_PINQ(E),P_SPINQ(a)::QAB1(E)
HTML5 logo

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).