MESON Chess Problem Database

Problem Display
PID: 225702 (Q7/2p5/2p2P1N/3kP3/5nR1/2PPn3/2P1R1N1/7K w - - 0 1)

Polacek, Ladislav

Praca, 2000

Q7/2p5/2p2P1N/3kP3/5nR1/2PPn3/2P1R1N1/7K

#2

11 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qa5#
  • Tries
    • 1.Sxe3+?
      • 1...Kc5
        • 2.Qa5#
      • 1...Ke6
        • 2.Qe8#
      • 1...Kxe5!
    • 1.Sxf4+?
      • 1...Kc5
        • 2.Qa5#
      • 1...Kxe5!
    • 1.Qxc6+?
      • 1...Kxe5
        • 2.Rxe3#
        • 2.Rg5#
        • 2.d4#
      • 1...Kxc6!
    • 1.Qa2+?
      • 1...Kc5
        • 2.Qa5#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Kxe5!
  • Keys
    • 1.d4!
      • 1...Kc4
        • 2.Qxc6#
      • 1...Ke4
        • 2.Qxc6#
      • 1...Ke6
        • 2.Qxc6#
      • 1...Sxc2
        • 2.Qa2#
      • 1...Sexg2
        • 2.Qa2#
      • 1...Sxg4
        • 2.Qa2#
      • 1...Sxe2
        • 2.Qg8#
      • 1...Sfxg2
        • 2.Qg8#
      • 1...Sd1
        • 2.Qa2#
      • 1...Sf1
        • 2.Qa2#
      • 1...Sc4
        • 2.Sxf4#
      • 1...Sf5
        • 2.Qa2#
      • 1...Sd3
        • 2.Qg8#
      • 1...Sh3
        • 2.Qg8#
      • 1...Sh5
        • 2.Qg8#
      • 1...Se6
        • 2.Sxe3#
      • 1...Sg6
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 17
    • REMOVED MATES = 1
  • Sets
    • K(c);N_SPINP(d),P-FLIGHT::QAR2(K)
  • Tries
    • Try
      • S(D);CHECK,XS(a)
      • Vars
        • K(c);N_SPINP(d),P-FLIGHT::QAR2(K)
        • K(c);N_SPINP(d),S_FLIGHT::QAR2(K)
      • Refutation
        • K(c);N_SPINP(d),P-FLIGHT,XP(H)
    • Try
      • S(D);CHECK,XS(b)
      • Vars
        • K(c);N_SPINP(d),P-FLIGHT::QAR2(K)
      • Refutation
        • K(c);N_SPINP(d),P-FLIGHT,P_SPINS(a),XP(H)
    • Try
      • Q(K);CHECK,XP(d)
      • Refutation
        • K(c);S_FLIGHT,XQ(K)
    • Try
      • Q(K);CHECK,N_PINP(d)
      • Vars
        • K(c);P-FLIGHT::QAR2(K)
        • S(a);N_GUARD,P_SPINS(a)::QAB1(K),XS(a)
      • Refutation
        • K(c);P-FLIGHT,P_SPINS(a),XP(H)
  • Actual
    • P(F);
    • Vars
      • K(c);N_SPINP(d),S_FLIGHT::QAR2(K),XP(d)
      • K(c);P_SPINS(a),S_FLIGHT::QAB(K),XP(d)
      • S(a);N_GUARD,XP(B)::QAB(K)
      • S(a);N_GUARD,XS(D)::QAB(K)
      • S(a);N_GUARD,XR(G)::QAB(K)
      • S(b);N_GUARD,XR(C)::QAB(K)
      • S(b);N_GUARD,XS(D)::QAB(K)
      • S(a);N_GUARD::QAB(K)
      • S(a);SBLOCK::S(D),XS(b)
      • S(b);N_GUARD::QAB(K)
      • S(b);SBLOCK::S(D),XS(a)
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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).