MESON Chess Problem Database

Problem Display
PID: 249608 (3n4/2p5/5p2/3k1N1K/P2P4/1nR3p1/2P1Q3/7b w - - 0 1)

Valle, Giovanni Batista

Deutsche Schachzeitung, 1891

3n4/2p5/5p2/3k1N1K/P2P4/1nR3p1/2P1Q3/7b

#2

7 + 7

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Be4
      • 2.Qc4#
    • 1...Sa1
      • 2.Rc5#
    • 1...Sc1
      • 2.Rc5#
    • 1...Sd2
      • 2.Rc5#
    • 1...Sa5
      • 2.Rc5#
    • 1...Sc5
      • 2.Rxc5#
  • Tries
    • 1.Se7+?
      • 1...Kxd4
        • 2.Rc4#
        • 2.Qe3#
      • 1...Kd6!
    • 1.Rxc7?
      • threat
        • 2.c4#
      • 1...Be4
        • 2.Qc4#
      • 1...Sd2
        • 2.Rc5#
      • 1...Sa5
        • 2.Rc5#
      • 1...Bf3+!
  • Keys
    • 1.Rc6!
      • 1...Bf3+
        • 2.Qxf3#
      • 1...Kxc6
        • 2.Qb5#
      • 1...Sxd4
        • 2.Se7#
      • 1...Sxc6
        • 2.c4#
      • 1...Bg2
        • 2.Qxg2#
      • 1...Be4
        • 2.Qc4#
      • 1...Sa1
        • 2.Rc5#
      • 1...Sc1
        • 2.Rc5#
      • 1...Sd2
        • 2.Rc5#
      • 1...Sa5
        • 2.Rc5#
      • 1...Sc5
        • 2.Rxc5#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sb7
        • 2.Qe6#
      • 1...Sf7
        • 2.Qe6#
      • 1...g2
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • B(a);SBLOCK::QAB1(B)
    • S(b);N_GUARD::R1(C)
    • S(b);N_GUARD::R1(C),XS(b)
  • Tries
    • Try
      • S(F);CHECK
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • R(C);XP(f)
      • Threat
        • P(A)
      • Vars
        • B(a);SBLOCK::QAB1(B)
        • S(b);N_GUARD::R1(C)
      • Refutation
        • B(a);CHECK
  • Actual
    • R(C);
    • Vars
      • B(a);CHECK,N_GUARD::QAB(B),XB(a)
      • K(d);S_FLIGHT,XR(C)::QAB1(B)
      • S(b);SBLOCK,XP(E)::S(F)
      • S(g);SBLOCK,XR(C)::P(A)
      • B(a);N_GUARD::QAB(B),XB(a)
      • B(a);SBLOCK::QAB1(B)
      • S(b);N_GUARD::R1(C)
      • S(b);N_GUARD::R1(C),XS(b)
      • S(g);N_GUARD::QAB1(B),XS(g)
      • S(g);N_GUARD::QAB1(B)
      • P(c);S_CUTB(a)::QAB(B)
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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).