MESON Chess Problem Database

Problem Display
PID: 272115 (8/2R5/4p1K1/3kp3/3N4/2p1Pp2/2P2P2/6Q1 w - - 0 1)

Shanshin, Valery Yurevich

Pat a Mat, 2001

8/2R5/4p1K1/3kp3/3N4/2p1Pp2/2P2P2/6Q1

#2

7 + 5

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Tries
    • 1.Sb5?
      • 1...Ke4
        • 2.Sxc3#
      • 1...e4!
    • 1.Qg4?
      • 1...exd4
        • 2.Qxd4#
      • 1...e4
        • 2.Qxe6#
      • 1...Kd6!
    • 1.Qg5?
      • 1...Kd6
        • 2.Qd8#
      • 1...Ke4!
  • Keys
    • 1.Qd1!
      • 1...Ke4
        • 2.Qxf3#
      • 1...Kd6
        • 2.Sb5#
      • 1...exd4
        • 2.Qxd4#
      • 1...e4
        • 2.Sxf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);
      • Vars
        • K(c);N_GUARD,S_FLIGHT::S(E),XP(a)
      • Refutation
        • P(d);
    • Try
      • Q(A);
      • Vars
        • P(d);OGATE,XS(E)::QAR1(A),XP(d)
        • P(d);::QAB1(A),XP(e)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);P_PINP(d)
      • Vars
        • K(c);N_GUARD,N_SPINP(d),P-FLIGHT::QAR2(A)
      • Refutation
        • K(c);N_SPINP(d),S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(c);N_GUARD,S_CUTP(d),S_FLIGHT::QAB1(A),XP(b)
      • K(c);N_GUARD,P-FLIGHT::QAR(A)+S(E),DCHECK
      • P(d);OGATE,P_SPINP(d),XS(E)::QAR1(A),XP(d)
      • P(d);SBLOCK::QAR(A)+S(E),XP(b)
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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).