MESON Chess Problem Database

Problem Display
PID: 179777 (B7/RQ2p3/p5p1/bn1pP3/4p1p1/2p3K1/2P2B2/7k w - - 0 1)

Matrenin, Mikhail Vasilevich

Probleemblad, 1979

B7/RQ2p3/p5p1/bn1pP3/4p1p1/2p3K1/2P2B2/7k

#2

7 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Sd4
      • 2.Qb1#
    • 1...Sd6
      • 2.Qb1#
    • 1...Sxa7
      • 2.Qb1#
    • 1...Sc7
      • 2.Qb1#
    • 1...e3
      • 2.Qxd5#
    • 1...d4
      • 2.Qxe4#
    • 1...e6
      • 2.Qh7#
  • Tries
    • 1.Rxa6?
      • 1...Bb4
        • 2.Ra1#
      • 1...Bb6
        • 2.Ra1#
      • 1...Bc7
        • 2.Ra1#
      • 1...Bd8
        • 2.Ra1#
      • 1...Sd4
        • 2.Qb1#
      • 1...Sd6
        • 2.Qb1#
      • 1...Sa7
        • 2.Qb1#
      • 1...Sc7
        • 2.Qb1#
      • 1...e3
        • 2.Qxd5#
      • 1...d4
        • 2.Qxe4#
      • 1...g5
        • 2.Rh6#
      • 1...e6
        • 2.Qh7#
      • 1...Sa3!
    • 1.Qxd5?
      • threat
        • 2.Qxe4#
        • 2.Qd1#
      • 1...Sd6
        • 2.Qd1#
      • 1...Sd4!
    • 1.Qxb5?
      • threat
        • 2.Qf1#
        • 2.Qb1#
      • 1...Bb4
        • 2.Qf1#
      • 1...axb5!
    • 1.Qxe7?
      • threat
        • 2.Qh4#
        • 2.Qh7#
      • 1...g5
        • 2.Qh7#
      • 1...Bd8!
  • Keys
    • 1.Qxa6!
      • 1...Sxa7
        • 2.Qf1#
      • 1...Bb4
        • 2.Qa1#
      • 1...Bb6
        • 2.Qa1#
      • 1...Bc7
        • 2.Qa1#
      • 1...Bd8
        • 2.Qa1#
      • 1...Sa3
        • 2.Qf1#
      • 1...Sd4
        • 2.Qf1#
      • 1...Sd6
        • 2.Qf1#
      • 1...Sc7
        • 2.Qf1#
      • 1...e3
        • 2.Bxd5#
      • 1...d4
        • 2.Bxe4#
      • 1...g5
        • 2.Qh6#
      • 1...e6
        • 2.Rh7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 7
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(f);OGATE::QAR(F)
    • S(f);OGATE,XR(E)::QAR(F)
    • P(c);OGATEB,P_SPINP(g)::QAB(F),XP(g)
    • P(g);OGATE,P_SPINP(c)::QAB(F),XP(c)
    • P(j);OGATE::QAR(F)
  • Tries
    • Try
      • R(E);XP(h)
      • Vars
        • B(e);OGATE::R(E)
        • B(e);OGATE,P_PINP(D)::R(E)
        • S(f);OGATE::QAR(F)
        • P(c);OGATEB,P_SPINP(g)::QAB(F),XP(g)
        • P(g);OGATE,P_SPINP(c)::QAB(F),XP(c)
        • P(i);OGATE::R(E)
        • P(j);OGATE::QAR(F)
      • Refutation
        • S(f);
    • Try
      • Q(F);P_PINP(c),XP(g)
      • Threat
        • DUALS(2)
      • Vars
        • S(f);::QAR(F)
      • Refutation
        • S(f);
    • Try
      • Q(F);XS(f)
      • Threat
        • DUALS(2)
      • Vars
        • B(e);::QAR2(F)
      • Refutation
        • P(h);XQ(F)
    • Try
      • Q(F);XP(j)
      • Threat
        • DUALS(2)
      • Vars
        • P(i);::QAR(F)
      • Refutation
        • B(e);
  • Actual
    • Q(F);XP(h)
    • Vars
      • S(f);OGATE,XR(E)::QAR2(F)
      • B(e);OGATE::QAB1(F)
      • B(e);OGATE,P_PINP(D)::QAB1(F)
      • S(f);OGATE,SBLOCK::QAR2(F)
      • S(f);OGATE::QAR2(F)
      • P(c);OGATEB,P_SPINP(g)::B(G),XP(g)
      • P(g);OGATE,P_SPINP(c)::B(G),XP(c)
      • P(i);OGATE::QAR(F)
      • P(j);OGATE::R(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).