MESON Chess Problem Database

Problem Display
PID: 117558 (R6R/1p2k2r/7q/p2Pp2P/4N1n1/8/K2p4/5Q2 w - - 0 1)

Marin y Llovet, Valentin

Deutsche Schachzeitung, 1906

R6R/1p2k2r/7q/p2Pp2P/4N1n1/8/K2p4/5Q2

#2

7 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3
      • 2.Rxh7#
    • 1...Qa6
      • 2.Rxh7#
    • 1...Qb6
      • 2.Rxh7#
    • 1...Qc6
      • 2.Rxh7#
    • 1...Qd6
      • 2.Rxh7#
    • 1...b5
      • 2.Ra7#
    • 1...b6
      • 2.Ra7#
  • Tries
    • 1.Rxh7+?
      • 1...Qg7
        • 2.Rxg7#
      • 1...Qxh7!
    • 1.Qb5?
      • threat
        • 2.Qe8#
        • 2.Qxb7#
      • 1...Kf7
        • 2.Qd7#
        • 2.Qxb7#
      • 1...Qxh5
        • 2.Qxb7#
      • 1...Rxh8
        • 2.Qxb7#
      • 1...Qc6
        • 2.Rxh7#
      • 1...Qf8
        • 2.Qxb7#
      • 1...Qa6
        • 2.Rxh7#
        • 2.Qe8#
      • 1...Qb6
        • 2.Rxh7#
        • 2.Qe8#
      • 1...Qd6
        • 2.Rxh7#
        • 2.Qe8#
      • 1...Qe6
        • 2.Qe8#
      • 1...Qg6
        • 2.Qxb7#
      • 1...b6
        • 2.Ra7#
        • 2.Qe8#
      • 1...Sf6!
    • 1.Qf8+?
      • 1...Kd7
        • 2.Qd8#
      • 1...Qxf8!
  • Keys
    • 1.Qa6!
      • threat
        • 2.Qxb7#
      • 1...Kd7
        • 2.Qxb7#
      • 1...Kf7
        • 2.Qxb7#
      • 1...Qxa6
        • 2.Rxh7#
      • 1...bxa6
        • 2.Ra7#
      • 1...Qb6
        • 2.Rxh7#
      • 1...Qc6
        • 2.Rxh7#
      • 1...Qd6
        • 2.Rxh7#
      • 1...Qe6
        • 2.Qxe6#
      • 1...Sf6
        • 2.Qe6#
      • 1...b5
        • 2.Ra7#
        • 2.Qb7#
        • 2.Qa7#
      • 1...b6
        • 2.Ra7#
        • 2.Qb7#
        • 2.Qa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • Q(e);N_GUARD::R(G),XR(h)
    • P(f);OGATEB::R(F)
  • Tries
    • Try
      • R(G);CHECK,XR(h)
      • Vars
        • Q(e);N_GUARD,P_SPINQ(e)::R(G),XQ(e)
      • Refutation
        • Q(e);XR(G)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(e);XP(E)::QAR(A),XP(f)
        • R(h);XR(G)::QAR(A),XP(f)
        • Q(e);N_GUARD::R(G),XR(h)
        • Q(e);::QAR(A),XP(f)
        • Q(e);P_PINP(D)::QAR1(A)
      • Refutation
        • S(b);
    • Try
      • Q(A);CHECK
      • Vars
        • K(g);P-FLIGHT::QAR1(A)
      • Refutation
        • Q(e);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR(A),XP(f)
    • Vars
      • K(g);P-FLIGHT::QAR2(A),XP(f)
      • K(g);P-FLIGHT::QAR(A),XP(f)
      • Q(e);N_GUARD,XQ(A)::R(G),XR(h)
      • P(f);OGATEB,XQ(A)::R(F)
      • Q(e);N_GUARD::R(G),XR(h)
      • Q(e);N_GUARD,P_PINP(D)::QAR1(A),XQ(e)
      • S(b);S_CUTQ(e)::QAR1(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).