MESON Chess Problem Database

Problem Display
PID: 174152 (4R3/1KN2p1b/1pN1q3/2p5/2p1k3/2P3P1/3P4/5Q2 w - - 0 1)

Buchner, Richard

Volk und Zeit, 1925

4R3/1KN2p1b/1pN1q3/2p5/2p1k3/2P3P1/3P4/5Q2

#2

8 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Rxe5#
    • 1...Qe7
      • 2.Rxe7#
    • 1...Bf5
      • 2.Qe2#
    • 1...f5
      • 2.Rxe6#
      • 2.Qe2#
    • 1...f6
      • 2.Rxe6#
  • Tries
    • 1.Sb4?
      • threat
        • 2.Qf4#
      • 1...Ke5
        • 2.Qf4#
      • 1...cxb4!
    • 1.Sd4?
      • threat
        • 2.Qe2#
      • 1...Ke5
        • 2.Qf4#
      • 1...cxd4!
    • 1.d3+?
      • 1...cxd3
        • 2.Qf4#
      • 1...Ke3!
  • Keys
    • 1.Se7!
      • threat
        • 2.Qe2#
      • 1...Qd5+
        • 2.Sexd5#
      • 1...Qc8+
        • 2.Sxc8#
      • 1...Qc6+
        • 2.Sxc6#
      • 1...Ke5
        • 2.Qf4#
      • 1...Qxe7
        • 2.Rxe7#
      • 1...Qg4
        • 2.Sf5#
      • 1...Qh6
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • Q(e);OGATE::R1(H),XQ(e)
    • Q(e);OGATEB,P_PINS(G)::R(H),XQ(e)
    • B(g);SBLOCK::QAR2(A)
    • P(f);N_GUARD::R(H),XQ(e)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAR1(A)
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
      • Refutation
        • P(c);XS(E)
    • Try
      • S(E);
      • Threat
        • QAR2(A)
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
      • Refutation
        • P(c);XS(E)
    • Try
      • P(B);CHECK
      • Vars
        • P(a);SBLOCK,XP(B)::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • S(E);N_PINQ(e)
    • Threat
      • QAR2(A)
    • Vars
      • Q(e);CHECK::R(H)+S(E),XQ(e)
      • K(b);P-FLIGHT::QAB1(A)
      • Q(e);OGATE,P_PINS(G),P_SPINQ(e),XS(E)::R(H),XQ(e)
      • Q(e);::R(H)+S(E)
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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).