MESON Chess Problem Database

Problem Display
PID: 235718 (4r1B1/2pp1p1K/3p1Q1p/N2kP3/3P2R1/B2N1P2/2n5/1b6 w - - 0 1)

Shanshin, Valery Yurevich

Pat a Mat, 2017

4r1B1/2pp1p1K/3p1Q1p/N2kP3/3P2R1/B2N1P2/2n5/1b6

#2

10 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra8
      • 2.Bxf7#
      • 2.Qxf7#
    • 1...Rb8
      • 2.Bxf7#
      • 2.Qxf7#
    • 1...Rc8
      • 2.Bxf7#
      • 2.Qxf7#
    • 1...Rd8
      • 2.Bxf7#
      • 2.Qxf7#
    • 1...Rxg8
      • 2.Qxf7#
    • 1...c5
      • 2.Qxd6#
    • 1...c6
      • 2.Qxd6#
  • Tries
    • 1.e6?
      • threat
        • 2.Sf4#
        • 2.Qf5#
      • 1...Rxe6
        • 2.Sf4#
      • 1...Sxa3
        • 2.Qf5#
      • 1...Sxd4
        • 2.Rxd4#
      • 1...dxe6
        • 2.Sf4#
      • 1...Sa1
        • 2.Qf5#
      • 1...Se1
        • 2.Qf5#
      • 1...Sb4
        • 2.Qf5#
      • 1...Se3!
  • Keys
    • 1.Qf5!
      • threat
        • 2.e6#
      • 1...Rxe5
        • 2.Bxf7#
      • 1...Sxd4
        • 2.Sf4#
      • 1...dxe5
        • 2.Qxd7#
      • 1...Re6
        • 2.Qe4#
      • 1...Se3
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • R(i);N_GUARD,N_SPINP(h),XB(J)::QAB(H),XP(h)
    • P(f);N_GUARD::QAR1(H),XP(d)
  • Tries
    • Try
      • P(G);N_PINP(h)
      • Threat
        • DUALS(2)
      • Vars
        • R(i);XP(G)::S(B)
        • S(b);P_PINS(B),XB(A)::QAR2(H)
        • S(b);OGATE,P_PINS(B),XP(D)::R1(E),XS(b)
        • P(g);XP(G)::S(B)
        • S(b);P_PINS(B)::QAR2(H)
      • Refutation
        • S(b);P_PINS(B)
  • Actual
    • Q(H);
    • Threat
      • QAR(H)+P(G)
    • Vars
      • R(i);N_GUARD,P_SPINR(i),XP(G)::B(J),XP(h)
      • S(b);SBLOCK,XP(D)::S(B)
      • P(d);N_SPINP(h),OGATEB,P_SPINP(d),XP(G)::QAR2(H),XP(g)
      • R(i);N_SPINP(h),SBLOCK::QAB1(H)
      • S(b);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).