MESON Chess Problem Database

Problem Display
PID: 207017 (8/6q1/5R2/2pk2Pb/pP3B2/1n1r4/1K1N1Q2/8 w - - 0 1)

Lange, Max

Sonntagsblatt fur Schachfreunde, 1861

8/6q1/5R2/2pk2Pb/pP3B2/1n1r4/1K1N1Q2/8

#2

7 + 7

6490 yacpdb 2020
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg5
      • 2.Rd6#
    • 1...Qa7
      • 2.Rd6#
    • 1...Qb7
      • 2.Rd6#
    • 1...Qf7
      • 2.Rd6#
    • 1...Qh7
      • 2.Rd6#
    • 1...Qg8
      • 2.Rd6#
    • 1...Rc3
      • 2.Rd6#
    • 1...Rd4
      • 2.Rd6#
    • 1...Sa1
      • 2.Qxc5#
    • 1...Sc1
      • 2.Qxc5#
    • 1...Sd4
      • 2.Rd6#
    • 1...Sa5
      • 2.Qxc5#
  • Keys
    • 1.Qd4+!
      • 1...Kxd4
        • 2.Rd6#
      • 1...Rxd4
        • 2.Rd6#
      • 1...Sxd4
        • 2.Rd6#
      • 1...cxd4
        • 2.Rd6#

This anticipates 194835(1864)

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • Q(g);N_PINR(G),XP(F)::R1(G)
    • Q(g);N_PINR(G)::R1(G)
    • R(b);N_PINR(G)::R1(G)
    • S(a);N_GUARD::QAR1(C),XP(d)
    • S(a);N_PINR(G)::R1(G)
  • Actual
    • Q(C);CHECK,N_SPINR(G)
    • Vars
      • K(e);P-FLIGHT,XQ(C)::R(G)
      • R(b);SBLOCK,XQ(C)::R1(G)
      • S(a);SBLOCK,XQ(C)::R1(G)
      • P(d);SBLOCK,XQ(C)::R1(G)
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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).