MESON Chess Problem Database

Problem Display
PID: 225251 (r1b3Rb/3QBNnB/2p5/Rq5k/4p2p/8/1p1N4/1K6 w - - 0 1)

Ekstrom, Sven Johan Adrian

Suomen Shakki, 1944

r1b3Rb/3QBNnB/2p5/Rq5k/4p2p/8/1p1N4/1K6

#2

8 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qg5
      • 2.Rxg5#
    • 1...Sf5
      • 2.Rg5#
    • 1...Se8
      • 2.Bg6#
  • Tries
    • 1.Qh3?
      • threat
        • 2.Qxh4#
      • 1...Qg5
        • 2.Rxg5#
      • 1...Sf5
        • 2.Bg6#
        • 2.Rg5#
        • 2.Qg4#
      • 1...Bxh3!
  • Keys
    • 1.Sxe4!
      • threat
        • 2.Sf6#
      • 1...Qf5
        • 2.Qd1#
      • 1...Sf5
        • 2.Rg5#
      • 1...Se6
        • 2.Qd1#
      • 1...Se8
        • 2.Bg6#
      • 1...h3
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(d);OGATE::R1(C),XQ(d)
    • S(g);N_SPINQ(d),OGATE::R1(H)
    • S(g);::B(G)
  • Tries
    • Try
      • Q(D);P_PINP(c)
      • Threat
        • QAR1(D),XP(c)
      • Vars
        • Q(d);OGATE::R1(C),XQ(d)
      • Refutation
        • B(i);N_SPINP(c),XQ(D)
  • Actual
    • S(B);XP(b)
    • Threat
      • S(B)
    • Vars
      • Q(d);P_PINS(B),S_CUTB(i)::QAB(D)
      • S(g);N_SPINQ(d),OGATE::R1(H)
      • S(g);S_CUTB(i)::QAB(D)
      • S(g);::B(G)
      • P(c);N_GUARD::S(B)
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).