MESON Chess Problem Database

Problem Display
PID: 187739 (1n2r2b/7r/2N1p3/1kP5/4K2p/3N4/Q1P5/6R1 w - - 0 1)

Gold, Samuel

Pesti Naplo, 1909

1n2r2b/7r/2N1p3/1kP5/4K2p/3N4/Q1P5/6R1

#2

7 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rh5
      • 2.Sa7#
    • 1...Rh6
      • 2.Sa7#
    • 1...Ra7
      • 2.Sxa7#
    • 1...Rg7
      • 2.Sd4#
    • 1...Bd4
      • 2.Sxd4#
    • 1...Bg7
      • 2.Sa7#
    • 1...Sxc6
      • 2.c4#
    • 1...Sd7
      • 2.Sa7#
  • Tries
    • 1.Sce5?
      • threat
        • 2.Rb1#
        • 2.c4#
      • 1...Sa6
        • 2.c4#
      • 1...Sc6
        • 2.c4#
      • 1...Bxe5!
    • 1.Sxb8?
      • threat
        • 2.Qa6#
        • 2.c4#
      • 1...Ra7
        • 2.c4#
      • 1...Bc3
        • 2.Qa6#
      • 1...Rxb8!
    • 1.Rb1+?
      • 1...Bb2
        • 2.Sd4#
      • 1...Kxc6!
    • 1.Qb3+?
      • 1...Ka6
        • 2.Qb6#
      • 1...Kxc6!
    • 1.Qa5+?
      • 1...Kc4
        • 2.Qb4#
      • 1...Kxc6!
  • Keys
    • 1.Rg7!
      • threat
        • 2.Sd4#
        • 2.Sa7#
      • 1...Kxc6
        • 2.Qa4#
      • 1...Rxg7
        • 2.Sd4#
      • 1...Bxg7
        • 2.Sa7#
      • 1...Sxc6
        • 2.c4#
      • 1...Re7
        • 2.Sd4#
      • 1...Rd8
        • 2.Sa7#
      • 1...e5
        • 2.Sa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • R(d);N_GUARD::S(G)
    • R(d);N_GUARD::S(G),XR(d)
    • R(d);S_CUTB(g)::S(G)
    • B(g);N_GUARD::S(G),XB(g)
    • B(g);S_CUTR(d)::S(G)
    • S(e);SBLOCK,XS(G)::P(C)
    • S(e);S_CUTR(d)::S(G)
  • Tries
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • S(e);::P(C)
      • Refutation
        • B(g);XS(G)
    • Try
      • S(G);XS(e)
      • Threat
        • DUALS(2)
      • Vars
        • R(d);::P(C)
        • B(g);::QAB1(B)
      • Refutation
        • R(f);XS(G)
    • Try
      • R(A);CHECK
      • Vars
        • B(g);P_SPINB(g)::S(G)
      • Refutation
        • K(b);S_FLIGHT,XS(G)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT,XS(G)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT,XS(G)
  • Actual
    • R(A);
    • Threat
      • DUALS(2)
    • Vars
      • K(b);S_FLIGHT,XS(G)::QAB(B)
      • R(d);XR(A)::S(G)
      • B(g);XR(A)::S(G)
      • S(e);SBLOCK,XS(G)::P(C)
      • R(f);::S(G)
      • P(c);::S(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).