MESON Chess Problem Database

Problem Display
PID: 187758 (1Q6/3p1K2/4N3/5p2/2r1kB2/2p3n1/B3bR2/b3R3 w - - 0 1)

Charvat, Prokop

The Houston Post, 1909

1Q6/3p1K2/4N3/5p2/2r1kB2/2p3n1/B3bR2/b3R3

#2

7 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qb7#
      • 2.Qa8#
    • 1...Rd4
      • 2.Sc5#
  • Tries
    • 1.Sc5+?
      • 1...Kd4
        • 2.Qe5#
        • 2.Qd6#
      • 1...Kd5
        • 2.Qd6#
      • 1...Rxc5!
    • 1.Sg5+?
      • 1...Kd4
        • 2.Qd6#
      • 1...Kd5
        • 2.Qd6#
      • 1...Kd3!
    • 1.Bb1+?
      • 1...Kd5
        • 2.Qd6#
      • 1...c2!
    • 1.Rexe2+?
      • 1...Kd3
        • 2.Re3#
      • 1...Kd5
        • 2.Qd6#
        • 2.Qb5#
        • 2.Qb7#
        • 2.Qa8#
      • 1...Sxe2!
    • 1.Qd6?
      • threat
        • 2.Sg5#
      • 1...Rd4
        • 2.Sc5#
        • 2.Qxd4#
      • 1...dxe6!
    • 1.Qb1+?
      • 1...Kd5
        • 2.Qb7#
      • 1...c2!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Qxc4#
      • 1...Kd3
        • 2.Bb1#
      • 1...Kd5
        • 2.Qb7#
      • 1...c2
        • 2.Qf3#
      • 1...Ra4
        • 2.Qc2#
        • 2.Qd5#
      • 1...Rb4
        • 2.Qc2#
        • 2.Qd5#
      • 1...Rd4
        • 2.Sc5#
      • 1...Rc5
        • 2.Qc2#
      • 1...Rc6
        • 2.Qc2#
        • 2.Qd5#
      • 1...Rc7
        • 2.Qc2#
        • 2.Qd5#
      • 1...Rc8
        • 2.Qc2#
        • 2.Qd5#
      • 1...d5
        • 2.Qc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(e);N_GUARD,SBLOCK::S(E)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(f);N_SPINB(b),P_SPINR(e),S_FLIGHT::QAR1(G)
      • Refutation
        • R(e);XS(E)
    • Try
      • S(E);CHECK
      • Vars
        • K(f);N_SPINB(b),P-FLIGHT::QAR2(G)
        • K(f);N_SPINB(b),P_SPINR(e),S_FLIGHT::QAR1(G)
      • Refutation
        • K(f);N_SPINB(b),S_FLIGHT
    • Try
      • B(B);CHECK
      • Vars
        • K(f);N_SPINB(b),S_FLIGHT::QAR1(G)
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • R(A);CHECK,XB(b)
      • Vars
        • K(f);S_FLIGHT::R1(A)
      • Refutation
        • S(d);XR(A)
    • Try
      • Q(G);
      • Threat
        • S(E)
      • Refutation
        • P(h);XS(E)
    • Try
      • Q(G);CHECK
      • Vars
        • K(f);N_SPINB(b),P_SPINR(e),S_FLIGHT::QAB(G)
      • Refutation
        • P(c);P_SPINP(c)
  • Actual
    • Q(G);
    • Threat
      • QAR2(G),XR(e)
    • Vars
      • K(f);N_SPINB(b),P_SPINP(c),S_FLIGHT::B(B)
      • K(f);N_SPINB(b),P_SPINR(e),S_FLIGHT::QAB(G)
      • P(c);OGATE::QAB1(G)
      • R(e);N_GUARD,SBLOCK::S(E)
      • R(e);::QAB(G)
      • P(h);SBLOCK::QAB(G)
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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).