MESON Chess Problem Database

Problem Display
PID: 262350 (3Q2R1/7n/8/4K2k/8/8/4R3/5n2 w - - 0 1)

Beauruel, M

Europe Echecs, 1974

3Q2R1/7n/8/4K2k/8/8/4R3/5n2

#2

4 + 3

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kh6
      • 2.Qh4#
    • 1...Sd2
      • 2.Rh2#
    • 1...Sh2
      • 2.Rxh2#
    • 1...Se3
      • 2.Rh2#
    • 1...Sg3
      • 2.Rh2#
    • 1...Sg5
      • 2.Qxg5#
    • 1...Sf8
      • 2.Qg5#
  • Tries
    • 1.Kd4?
      • 1...Kh6
        • 2.Qh4#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Sd2
        • 2.Rh2#
      • 1...Sh2
        • 2.Rxh2#
      • 1...Se3
        • 2.Rh2#
      • 1...Sg3
        • 2.Rh2#
      • 1...Sf8
        • 2.Qg5#
      • 1...Sf6!
    • 1.Kf4?
      • 1...Kh6
        • 2.Qh4#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Sd2
        • 2.Rh2#
      • 1...Sh2
        • 2.Rxh2#
      • 1...Se3
        • 2.Rh2#
      • 1...Sg3
        • 2.Rh2#
      • 1...Sf8
        • 2.Qg5#
      • 1...Sf6!
    • 1.Kd6?
      • 1...Kh6
        • 2.Qh4#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Sd2
        • 2.Rh2#
      • 1...Sh2
        • 2.Rxh2#
      • 1...Se3
        • 2.Rh2#
      • 1...Sg3
        • 2.Rh2#
      • 1...Sf8
        • 2.Qg5#
      • 1...Sf6!
    • 1.Rf2?
      • 1...Kh6
        • 2.Qh4#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Sd2
        • 2.Rh2#
      • 1...Sh2
        • 2.Rxh2#
      • 1...Se3
        • 2.Rh2#
      • 1...Sg3
        • 2.Rh2#
      • 1...Sf8
        • 2.Qg5#
      • 1...Sf6!
    • 1.Reg2?
      • 1...Kh6
        • 2.Qh4#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Sd2
        • 2.Rh2#
      • 1...Sh2
        • 2.Rxh2#
      • 1...Se3
        • 2.Rh2#
      • 1...Sg3
        • 2.Rh2#
      • 1...Sf8
        • 2.Qg5#
      • 1...Sf6!
    • 1.Re4?
      • threat
        • 2.Rh4#
        • 2.Qh4#
      • 1...Kh6
        • 2.Rh4#
        • 2.Qh4#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Sf6!
    • 1.Qf6?
      • 1...Sg5
        • 2.Qxg5#
      • 1...Sd2
        • 2.Rh2#
      • 1...Sh2
        • 2.Rxh2#
      • 1...Se3
        • 2.Rh2#
      • 1...Sg3
        • 2.Rh2#
      • 1...Sf8
        • 2.Qg5#
      • 1...Sxf6!
    • 1.Qe7?
      • threat
        • 2.Qxh7#
      • 1...Kh6
        • 2.Qh4#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Sf8
        • 2.Qg5#
      • 1...Sf6!
    • 1.Qd3?
      • threat
        • 2.Qxh7#
        • 2.Qh3#
      • 1...Kh4
        • 2.Qxh7#
      • 1...Kh6
        • 2.Qg6#
        • 2.Qh3#
      • 1...Se3
        • 2.Rh2#
        • 2.Qxh7#
      • 1...Sg3
        • 2.Rh2#
        • 2.Qxh7#
      • 1...Sf6
        • 2.Qh3#
      • 1...Sf8
        • 2.Qh3#
      • 1...Sg5!
    • 1.Qd7?
      • threat
        • 2.Qh3#
        • 2.Qxh7#
      • 1...Kh4
        • 2.Qg4#
        • 2.Qxh7#
      • 1...Kh6
        • 2.Qh3#
      • 1...Sf6
        • 2.Qh3#
      • 1...Sf8
        • 2.Qh3#
      • 1...Sg5!
    • 1.Qc8?
      • threat
        • 2.Qh3#
      • 1...Kh4
        • 2.Qg4#
      • 1...Kh6
        • 2.Qh3#
      • 1...Sg5!
    • 1.Qe8+?
      • 1...Kh6
        • 2.Qg6#
      • 1...Kh4!
  • Keys
    • 1.Qd2!
      • 1...Kh4
        • 2.Qh6#
      • 1...Sxd2
        • 2.Rh2#
      • 1...Se3
        • 2.Rh2#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Sh2
        • 2.Rxh2#
      • 1...Sg3
        • 2.Rh2#
      • 1...Sf6
        • 2.Qg5#
      • 1...Sf8
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(b);N_GUARD,P-FLIGHT::QAR2(C)
    • S(a);N_GUARD::R(A)
    • S(a);N_GUARD::R(A),XS(a)
    • S(c);N_GUARD::QAR1(C),XS(c)
    • S(c);N_GUARD::QAR1(C)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR2(C)
        • S(c);N_GUARD::QAR1(C),XS(c)
        • S(a);N_GUARD::R(A)
        • S(a);N_GUARD::R(A),XS(a)
        • S(c);N_GUARD::QAR1(C)
      • Refutation
        • S(c);
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR2(C)
        • S(c);N_GUARD::QAR1(C),XS(c)
        • S(a);N_GUARD::R(A)
        • S(a);N_GUARD::R(A),XS(a)
        • S(c);N_GUARD::QAR1(C)
      • Refutation
        • S(c);
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR2(C)
        • S(c);N_GUARD::QAR1(C),XS(c)
        • S(a);N_GUARD::R(A)
        • S(a);N_GUARD::R(A),XS(a)
        • S(c);N_GUARD::QAR1(C)
      • Refutation
        • S(c);
    • Try
      • R(A);
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR2(C)
        • S(c);N_GUARD::QAR1(C),XS(c)
        • S(a);N_GUARD::R(A)
        • S(a);N_GUARD::R(A),XS(a)
        • S(c);N_GUARD::QAR1(C)
      • Refutation
        • S(c);
    • Try
      • R(A);
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR2(C)
        • S(c);N_GUARD::QAR1(C),XS(c)
        • S(a);N_GUARD::R(A)
        • S(a);N_GUARD::R(A),XS(a)
        • S(c);N_GUARD::QAR1(C)
      • Refutation
        • S(c);
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);N_GUARD::QAR1(C),XS(c)
      • Refutation
        • S(c);
    • Try
      • Q(C);
      • Vars
        • S(c);N_GUARD::QAR1(C),XS(c)
        • S(a);N_GUARD::R(A)
        • S(a);N_GUARD::R(A),XS(a)
        • S(c);N_GUARD::QAR1(C)
      • Refutation
        • S(c);XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAR2(C),XS(c)
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR2(C)
        • S(c);N_GUARD::QAR1(C),XS(c)
        • S(c);N_GUARD::QAR1(C)
      • Refutation
        • S(c);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P-FLIGHT::QAR(C),XS(c)
        • S(c);::QAR2(C)
      • Refutation
        • S(c);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P-FLIGHT::QAR(C)
        • S(c);::QAR2(C)
      • Refutation
        • S(c);
    • Try
      • Q(C);
      • Threat
        • QAR2(C)
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR1(C)
        • K(b);P-FLIGHT::QAR(C)
      • Refutation
        • S(c);
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(b);N_GUARD,P-FLIGHT::QAR2(C)
      • S(a);N_GUARD,XQ(C)::R(A)
      • S(a);N_GUARD::R(A)
      • S(c);N_GUARD::QAR1(C),XS(c)
      • S(a);N_GUARD::R(A),XS(a)
      • S(c);N_GUARD::QAR1(C)
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).