MESON Chess Problem Database

Problem Display
PID: 252870 (4K2n/1p6/1P1pk1pR/1Q2p1P1/1p4P1/1P6/8/8 w - - 0 1)

Sushkov, Yuri Akimovich

Zabirokhin, Piotr

Zadachi i Etyudi, 2005

4K2n/1p6/1P1pk1pR/1Q2p1P1/1p4P1/1P6/8/8

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sf7
      • 2.Rxg6#
    • 1...e4
      • 2.Qf5#
    • 1...d5
      • 2.Qd7#
  • Tries
    • 1.Kf8?
      • 1...Sf7
        • 2.Rxg6#
      • 1...e4
        • 2.Qf5#
      • 1...d5!
    • 1.Rh7?
      • threat
        • 2.Re7#
      • 1...d5
        • 2.Qd7#
      • 1...Sf7!
    • 1.Rxh8?
      • 1...d5
        • 2.Qd7#
      • 1...e4!
    • 1.Qd3?
      • 1...e4
        • 2.Qxe4#
      • 1...Sf7
        • 2.Rxg6#
      • 1...d5!
    • 1.Qc6?
      • 1...e4
        • 2.Qxe4#
      • 1...Sf7
        • 2.Rxg6#
      • 1...bxc6!
    • 1.Qxb4?
      • 1...Kd5
        • 2.Qc4#
      • 1...e4
        • 2.Qxe4#
      • 1...d5
        • 2.Qe7#
      • 1...Sf7!
    • 1.Qa5?
      • 1...Sf7
        • 2.Rxg6#
      • 1...e4
        • 2.Qf5#
      • 1...d5!
    • 1.Qc5?
      • 1...Sf7
        • 2.Rxg6#
      • 1...e4
        • 2.Qf5#
      • 1...d5
        • 2.Qe7#
      • 1...dxc5!
  • Keys
    • 1.Qf1!
      • 1...Kd5
        • 2.Qc4#
      • 1...e4
        • 2.Qf5#
      • 1...Sf7
        • 2.Qxf7#
      • 1...d5
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(g);N_GUARD::R(F),XP(e)
    • P(b);OGATE::QAB1(C)
    • P(c);::QAB1(C)
  • Tries
    • Try
      • K(G);P-FLIGHT
      • Vars
        • S(g);N_GUARD::R(F),XP(e)
        • P(b);OGATE::QAB1(C)
      • Refutation
        • P(c);
    • Try
      • R(F);N_PINP(e)
      • Threat
        • R1(F)
      • Vars
        • P(c);::QAB1(C)
      • Refutation
        • S(g);
    • Try
      • R(F);N_PINP(e),XS(g)
      • Vars
        • P(c);::QAB1(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);
      • Vars
        • P(b);OGATEB::QAR2(C),XP(b)
        • S(g);N_GUARD::R(F),XP(e)
      • Refutation
        • P(c);
    • Try
      • Q(C);N_PINP(e),P_PINP(c)
      • Vars
        • P(b);OGATEB::QAR2(C),XP(b)
        • S(g);N_GUARD::R(F),XP(e)
      • Refutation
        • P(f);N_SPINP(c),P_SPINP(e),XQ(C)
    • Try
      • Q(C);XP(a)
      • Vars
        • K(d);N_SPINP(e),S_CUTP(c),S_FLIGHT::QAB1(C)
        • P(b);OGATEB::QAR2(C),XP(b)
        • P(c);OGATE,SBLOCK::QAR1(C)
      • Refutation
        • S(g);
    • Try
      • Q(C);
      • Vars
        • S(g);N_GUARD::R(F),XP(e)
        • P(b);OGATE::QAB1(C)
      • Refutation
        • P(c);
    • Try
      • Q(C);
      • Vars
        • S(g);N_GUARD::R(F),XP(e)
        • P(b);OGATE::QAB1(C)
        • P(c);OGATE,SBLOCK::QAR1(C)
      • Refutation
        • P(c);XQ(C)
  • Actual
    • Q(C);
    • Vars
      • K(d);N_SPINP(e),S_CUTP(c),S_FLIGHT::QAB1(C)
      • P(b);::QAB1(C)
      • S(g);N_GUARD::QAB1(C),XS(g)
      • P(c);SBLOCK::QAR1(C)
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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).