MESON Chess Problem Database

Problem Display
PID: 225591 (2nB2B1/2K1p1p1/1pN2krn/1P1PR3/6p1/1pRP2p1/1Q4P1/8 w - - 0 1)

Likhomanov, Yuri Evstafevich

Markov, Evgeny Viktorovich

4th Comm., Praca, 1992

2nB2B1/2K1p1p1/1pN2krn/1P1PR3/6p1/1pRP2p1/1Q4P1/8

#2

11 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sd6
      • 2.Bxe7#
    • 1...Sa7
      • 2.Bxe7#
  • Tries
    • 1.Be6?
      • 1...Sf5
        • 2.Rxf5#
      • 1...Sf7
        • 2.Rf5#
      • 1...Sg8
        • 2.Rf5#
      • 1...Sd6
        • 2.Bxe7#
      • 1...Sa7
        • 2.Bxe7#
      • 1...Rg5!
    • 1.Qc1?
      • 1...Sxg8
        • 2.Qf4#
        • 2.Qf1#
      • 1...Rg5
        • 2.Qxg5#
      • 1...Sf5
        • 2.Re6#
      • 1...Sf7
        • 2.Qf4#
        • 2.Qf1#
      • 1...Sd6
        • 2.Bxe7#
      • 1...Sa7
        • 2.Bxe7#
      • 1...b2!
    • 1.Qd2?
      • 1...Sxg8
        • 2.Qf4#
      • 1...Rg5
        • 2.Qxg5#
      • 1...Sf5
        • 2.Re6#
      • 1...Sf7
        • 2.Qf4#
      • 1...Sd6
        • 2.Bxe7#
      • 1...Sa7
        • 2.Bxe7#
      • 1...b2!
    • 1.Qf2+?
      • 1...Sf5
        • 2.Rxf5#
        • 2.Qxf5#
      • 1...gxf2!
  • Keys
    • 1.Sxe7!
      • 1...Kxe5
        • 2.Rc4#
      • 1...Sxg8
        • 2.Rf5#
      • 1...Sxe7
        • 2.Rc6#
      • 1...Sf5
        • 2.Rxf5#
      • 1...Rg5
        • 2.Re6#
      • 1...Sf7
        • 2.Rf5#
      • 1...Sd6
        • 2.Sc6#
      • 1...Sa7
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(j);N_GUARD::B(J),XP(h)
  • Tries
    • Try
      • B(K);
      • Vars
        • S(g);N_GUARD::R1(G),XS(g)
        • S(g);N_GUARD::R1(G)
        • S(j);N_GUARD::B(J),XP(h)
      • Refutation
        • R(f);
    • Try
      • Q(A);
      • Vars
        • R(f);N_GUARD::QAB1(A),XR(f)
        • S(g);SBLOCK::R1(G)
        • S(j);N_GUARD::B(J),XP(h)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • S(g);N_GUARD,XB(K)::QAR2(A)
        • R(f);N_GUARD::QAB1(A),XR(f)
        • S(g);SBLOCK::R1(G)
        • S(g);N_GUARD::QAR2(A)
        • S(j);N_GUARD::B(J),XP(h)
      • Refutation
        • P(a);
    • Try
      • Q(A);CHECK
      • Refutation
        • P(b);XQ(A)
  • Actual
    • S(H);XP(h)
    • Vars
      • K(e);OGATEB,S_FLIGHT,XR(G)::QAB(A)+R(C)
      • S(g);N_GUARD,XB(K)::R1(G)
      • S(j);N_GUARD,P_SPINS(j),XS(H)::R(C)
      • S(g);N_GUARD::R1(G),XS(g)
      • R(f);SBLOCK::R1(G)
      • S(g);N_GUARD::R1(G)
      • S(j);N_GUARD::B(J)+S(H)
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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).